作者： Ren, Zhandong;Tian, Miaojie;Cong, Ning;Jiang, Hucheng;Jiang, Hongwei;...

期刊： Chemical Communications,2022年58(98):13588-13591 ISSN：1359-7345

通讯作者： Ren, Zhandong(renzhandong@163.com);Zhu, Yuchan(zhuyuchan@163.com)

作者机构： [Jiang, Hongwei; Jiang, Hucheng; Zhu, Yuchan; Tian, Miaojie; Cong, Ning; Xie, Zhiqiang; Han, Juanjuan; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Ren, Zhandong] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, P. R. China.

摘要： Nano-network Ru with definite lattice defects on amorphous Co nanosheets is obtained for the first time. Amorphous Co support can promote the surface Ru to obtain special morphology and modified electronic structure, thus improving HER activity in alkaline solution. A current density of 10 mA cm−2 can be obtained only with an overpotential of 33.5 mV. © 2022 The Royal Society of Chemistry.

语种： 英文

作者： Huang, Yanjun;Liu, Heng;Wang, Yi;Song, Guangsen;Zhang, Lei

期刊： Separation and Purification Technology,2022年289:120724 ISSN：1383-5866

通讯作者： Zhang, L

作者机构： [Huang, Yanjun; Wang, Yi; Song, Guangsen; Liu, Heng; Zhang, Lei] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Zhang, L ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： Cold-rolling emulsion wastewater;Ceramic membranes;Ultrafiltration;Membrane fouling;Operating conditions

摘要： A commercial ZrO2/α-Al2O3 ceramic ultrafiltration (UF) membrane system with a capacity of 24 m3 h−1 and cut off of 20 kDa was used to treat cold-rolling emulsion wastewater (CREW) from an iron and steel industry in Central China. The ceramic membrane exhibited high removal efficiency for oil and chemical oxygen demand (COD), with an average removal rate of 99.88% and 98.41%, respectively, which were better than other reported state-of-the-art ceramic membranes. In order to solve the problems of membrane fouling and low permeation flux in the treatment of CREW, the control strategies were proposed. The results showed that the membrane fouling can be mitigated by controlling the feed concentration in circulation tank, increasing the cross-flow velocity, and proper chemical cleaning. The membrane fouling mechanism revealed that the experimental data were well described by the combined model of cake filtration and pore blocking at low cross-flow velocity (4.0–4.3 m s−1). At high cross-flow velocity (5.2 m s−1), the pore blocking models fit the data well. After optimizing the process operation parameters, the continuous operation time of the UF membrane was prolonged by 1.5–2 times, the cleaning times were reduced by 40%. The total operating cost of this system is about $3.01/m3, which is cheaper than the conventional treatment process. In addition, the service life of the ceramic membrane tube was greatly extended to more than 8 years, thus saving the cost of replacement. These results indicate that the process is an economical and efficient method in the treatment of CREW. © 2022

语种： 英文

作者： Zheng, Mingming;Wang, Yuhang;Yuan, Lianxin;Chen, Nan;Kong, Shaofei

期刊： Science of The Total Environment,2022年824:153708 ISSN：0048-9697

通讯作者： Kong, SF;Wang, YH

作者机构： [Zheng, Mingming] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Kong, Shaofei; Zheng, Mingming] China Univ Geosci Wuhan, Sch Environm Studies, Wuhan 430074, Peoples R China.;[Wang, Yuhang; Zheng, Mingming] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA.;[Chen, Nan; Yuan, Lianxin] Hubei Environm Monitoring Ctr, Wuhan 430072, Peoples R China.

通讯机构： [Kong, SF ] C;[Wang, YH ] G;China Univ Geosci Wuhan, Sch Environm Studies, Wuhan 430074, Peoples R China.;Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA.

关键词： Emission reduction;Inorganic particles;Effectiveness;Critical total ammonia concentration

摘要： Ammonia emission reduction is increasingly being considered one of the control measures to mitigate wintertime fine particulate matter (PM2.5) pollution. Three wintertime observations from 2012 to 2018 in Wuhan, China, were analyzed to examine the effectiveness of ammonia control in wintertime PM2.5 reduction based on the critical total ammonia concentration (CTAC, i.e., the inflection point of effective ammonia control for PM2.5 mass reduction based on the asymmetric response of PM2.5 to ammonia control). The CTAC gradually approached 0% (immediate effectiveness), with values of −26% in 2012, −23% in 2015, and −9% in 2018. At the observed ambient conditions, there were significant positive correlations of the CTAC with sulfate and total nitrate changes, in contrast to the negative correlation of the CTAC with total ammonia change. An approximately 10% total ammonia reduction could offset the decline in CTAC attributed to a 30–40% sulfate or 20–30% total nitrate reduction in Wuhan. This study indicates that the combined control of SO2 + NOx (NO+NO2) remains the preferred way to reduce inorganic particles in Central China at present, despite a tendency of the ambient chemical state moving towards effective ammonia control. However, as the CTAC approaches 0%, the effectiveness of ammonia and NOx reduction measures targeting wintertime PM2.5 can greatly exceed that observed during the 2012–2018 period in Central China. © 2022 Elsevier B.V.

语种： 英文

作者： Zheng, Mingming;Cao, Menghua;Yang, Danhua;Tu, Shuxin;Xiong, Shuanglian;...

期刊： Environmental Pollution,2022年296:118688 ISSN：0269-7491

通讯作者： Cao, MH

作者机构： [Shen, Wenjuan; Zheng, Mingming] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Cao, Menghua; Cao, MH; Yang, Danhua; Xiong, Shuanglian; Tu, Shuxin] Huazhong Agr Univ, Coll Resources & Environm, Hubei Key Lab Soil Environm & Pollut Remediat, Wuhan 430070, Peoples R China.;[Zhou, Haiyan] Guangdong Prov Acad Environm Sci, Inst Ecoenvironm & Soil Remediat, Guangzhou 510045, Peoples R China.

通讯机构： [Cao, MH ] H;Huazhong Agr Univ, Coll Resources & Environm, Hubei Key Lab Soil Environm & Pollut Remediat, Wuhan 430070, Peoples R China.

关键词： Anionic metal/metalloid;Cationic metal;Ferrous sulfide;Soil washing;Tetrapolyphosphate

摘要： In this study, a novel approach was employed for the remediation of cationic and anionic metals/metalloids co-contaminated soil by tetrapolyphosphate enhanced soil washing coupled with ferrous sulfide treatment. Tetrapolyphosphate could simultaneously enhance the desorption of cationic metals (Pb and Zn) and anionic metal/metalloid (Cr and As) from the contaminated soil in the whole tested pH range of 2–10. With addition of 0.15 mol/L tetrapolyphosphate at pH 7.0, the removal ratio of Pb, Zn, As and Cr could achieve 83.1%, 70.4%, 75.7% and 66.4% respectively. The fractionation analysis of heavy metals/metalloids demonstrated the release of exchangeable and Fe/Mn bound forms contributed to most desorption of Pb and Zn. The decreases of non-specifically sorbed form and amorphous and poorly-crystalline hydrous oxides of Fe and Al bound form were responsible for most removal of As. The comparison with other common washing agents (EDTA, oxalate and phosphate) under their respective optimal dosage could confirm that tetrapolyphosphate was superior to simultaneously desorb the cationic and anionic metals/metalloids with higher efficiency. After 12 h, applying 150 mg/L FeS at pH 3.5 could totally remove Pb, Zn, As and Cr from the washing effluent by sulfide precipitation, reduction and adsorption processes. Higher pH would inhibit the removal of As and Cr by FeS. Meanwhile, the residual of tetrapolyphosphate could be totally recovered from the washing effluent by employing anion exchange resin. This study suggests tetrapolyphosphate enhanced soil washing coupled with ferrous sulfide treatment is a promising approach for remediation of cationic and anionic metals/metalloids co-contaminated soil in view of its high efficiency and simple operation. © 2021 Elsevier Ltd

语种： 英文

作者： Gao, Renbo;Zhao, Yunliang;Chen, Licai;Zhang, Tingting;Miao, Yanhui;...

期刊： Colloids and Surfaces A: Physicochemical and Engineering Aspects,2022年650:129661 ISSN：0927-7757

通讯作者： Zhao, Yunliang(zyl286@whut.edu.cn)

作者机构： [Gao, Renbo; Chen, Licai; Miao, Yanhui; Zhou, Yakun; Zhao, Yunliang; Song, Shaoxian] Wuhan Univ Technol, Hubei Key Lab Mineral Resources Proc & Environm, 122 Luoshi Rd, Wuhan 430070, Hubei, Peoples R China.;[Gao, Renbo; Chen, Licai; Miao, Yanhui; Zhou, Yakun; Zhao, Yunliang; Song, Shaoxian] Wuhan Univ Technol, Sch Resources & Environm Engn, 122 Luoshi Rd, Wuhan 430070, Hubei, Peoples R China.;[Zhang, Tingting] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Yunliang Zhao; Licai Chen] H;Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei 430070, China<&wdkj&>School of Resources and Environmental Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei 430070, China

关键词： Exfoliation degree;Functional composites;Montmorillonite nanosheets;Performance

摘要： Montmorillonite (MMT) is easily exfoliated into two-dimensional(2D) nanosheets, which are widely used to prepare functional composites. However, there are few studies on the differences in the performance of MMT nanosheets (MMTNS) with different exfoliation degrees, which seriously limits the further breakthrough in the preparation of high-performance MMTNS based materials. In this work, some representative performance of MMTNS with different exfoliation degrees was investigated, and the performance was closely related with making functional composites. The exfoliation degrees of MMTNS were controlled by different ultrasonic exfoliation powers. The performance of MMTNS was studied by the measurements of atomic force microscopy (AFM), Zeta potential, turbidity, viscosity, scanning electron microscopy (SEM) and molecular dynamics simulation. The results show that MMTNS with high exfoliation degree had more negative electrical sites exposed and stronger repulsive potential energy between particles, which exhibited high surface negative electricity and excellent dispersion stability. Moreover, the MMTNS with high exfoliation degree had better gelling property. It can be seen that the “house-of-cards” structure in the structure after gelation of MMTNS with high exfoliation degree was more intensive. Also, with the increase of MMTNS exfoliation degree, its adsorption capacity for organic matter was better and its reaction with organic was more active. These findings might be helpful to select the suitable MMTNS for making functional composites by controlling its exfoliation degree. © 2022 Elsevier B.V.

语种： 英文

作者： Gao, Xinlei;Chen, Hao;Lv, Sichao;Zhang, Zhiyong;Wang, Tingting

期刊： Journal of Tribology,2022年144(4):041901 ISSN：0742-4787

通讯作者： Gao, XL

作者机构： [Wang, Tingting; Gao, Xinlei; Gao, XL; Lv, Sichao; Zhang, Zhiyong; Chen, Hao] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.;[Gao, Xinlei; Gao, XL] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China.

通讯机构： [Gao, XL ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.;Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China.

关键词： superlubricity;liquid crystal;nematic phase;polyimide;alignment;friction

摘要： We have studied the friction behavior based on liquid crystal (LC) alignment of a unique tribological system composed of a nematic LC and polyimide (PI). The LC was used as a lubricant and a tribological factor with molecular alignment ability. PI was used as both a rubbing pair part and a LC alignment agent. The LCs used as lubricants included the single LC 5CB and the mixed LCs 5CB-2UTPP3 and 3PEP5-3UTPP4. The PI used as the friction pair was 6FDA-ODA PI, and its counterpart was GCr15 steel. For this system, it was found that under the premise that the nematic phase temperature range of the selected LC meets the operating temperature of the friction test at a suitable ambient temperature, the operating speed and load are controlled to maintain a stable lubricating film thickness between the friction pairs during operation of the system. Moreover, by avoiding excessive or insufficient friction heat generated by the running speed being too high or too low to change the phase state of the LC, with the anchoring energy between the PI and the LC, the LC molecules will align in the rubbing direction, that is, they will arrange parallel to each other along the grooves, which can contribute to achieve superlubricity behavior. © 2022 American Society of Mechanical Engineers (ASME). All rights reserved.

语种： 英文

作者： Huang, Wenwen;Liu, Jiacheng;Rao, Na;Fan, Guozhi;Yan, Juntao;...

期刊： Environmental Technology,2022年43(28):4545-4553 ISSN：0959-3330

通讯作者： Cheng, Qunpeng(cqp627@126.com)

作者机构： [Rao, Na; Cheng, Qunpeng; Liu, Jiacheng; Song, Guangsen; Yan, Juntao; Huang, Wenwen; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan, Peoples R China.

通讯机构： [Qunpeng Cheng] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, People’s Republic of China

关键词： Surfactant;CO2 adsorption;MCM-41;PEI;amine-functionalized

摘要： Concerning the increasing greenhouse effect, the development of efficient CO2 adsorbents is very important. In this study, the influence of surfactant on the adsorption performance of amine-functionalized MCM-41 was analysed. The results showed that the residual amount of surfactant in MCM-41 was gradually decreased with the increase of calcination temperature which improved the pore structure. The maximum adsorption capacity (5.495 mmol/g) appeared at PEI-MCM-41-100°C indicated that the adsorption capacity could be improved under the function of surfactant. By calculating the diffusion coefficient of CO2 adsorption process in PEI-MCM-41-100/200/300/400/550°C, the diffusion resistance of CO2 was the lowest in PEI-MCM-41-100°C, which directly proved that the synergism of surfactant and organic amine could reduce the diffusion resistance of CO2 in the pore. © 2021 Informa UK Limited, trading as Taylor & Francis Group.

语种： 英文

作者： Chen, Shizhong*;Liu, Jinhong;Yan, Juntao;Wang, Chunlei;Lu, Dengbo

期刊： FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT,2022年39(3):499-507 ISSN：1944-0049

通讯作者： Chen, Shizhong

作者机构： [Chen, Shizhong; Lu, Dengbo] Wuhan Polytech Univ, Coll Food Sci & Engn, Wuhan 430023, Peoples R China.;[Wang, Chunlei; Yan, Juntao; Liu, Jinhong] Wuhan Polytech Univ, Coll Chem & Environm Engn, Wuhan, Peoples R China.

通讯机构： [Chen, Shizhong] W;Wuhan Polytech Univ, Coll Food Sci & Engn, Wuhan 430023, Peoples R China.

关键词： Antimony species;in-syringe solid phase extraction;in-syringe vortex-assisted solidified floating organic drop microextraction;graphite furnace atomic absorption spectrometry;rice wines

摘要： The current non-chromatographic speciation methods generally involve the conversion of different species by oxidation/reduction reactions, which may cause inherent problems such as contamination risk, time consumption and complex operations. In this work, in-syringe solid phase extraction (IS-SPE) was combined with in-syringe vortex-assisted solidified floating organic drop microextraction (IS-VA-SFODME) for the detection of Sb(V) and Sb(III) in rice wines by graphite furnace atomic absorption spectrometry. Firstly, IS-SPE involved the use of ZnFe2O4 nanotubes as the sorbent for the isolation and enrichment of Sb(V) and removal of the matrix components such as ethanol, pigment, sugars and carbohydrates. Then, IS-VA-SFODME was used for enriching Sb(III) in the original sample solution after IS-SPE. This technique exhibited good anti-interference ability and high enrichment efficiency without tedious pre-oxidation/pre-reduction and centrifugation/filtration operations, which may cause the contamination of samples. Under the selected conditions, the detection limits were 4.5ngL−1 and 3.2ngL−1 for Sb(III) and Sb(V) with relative standard deviations of 7.3% and 5.1%, respectively. This procedure was used with satisfactory results for the detection of Sb(III) and Sb(V) in rice wine samples and a certified reference material of water sample. Recoveries of spiked experiments ranged from 91.0 to 107%. © 2022 Taylor & Francis Group, LLC.

语种： 英文

作者： Zhao, Chenchen;Li, Jianping;Cai, Huihua;Wu, Dingwei;Tao, Suwan;...

期刊： BIOMATERIALS SCIENCE,2022年11(4):1422-1436 ISSN：2047-4830

通讯作者： Xu, Na(naxu@wust.edu.cn);Zhang, Tongcun(zhangtongcun@wust.edu.cn)

作者机构： [Tao, Suwan; Zhang, Tongcun; Zhao, Chenchen; Xu, Na; Wu, Dingwei] Wuhan Univ Sci & Technol, Inst Biol & Med, Coll Life Sci & Hlth, Wuhan 430065, Peoples R China.;[Li, Jianping; Pi, Chaoran] Wuhan Univ Sci & Technol, Inst Adv Mat & Nanotechnol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China.;[Cai, Huihua] Guangdong Acad Med Sci, Guangdong Prov Peoples Hosp, Dept Obstet & Gynecol, Guangzhou 510080, Peoples R China.;[Zhu, Lian] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Na Xu; Tongcun Zhang] I;Institute of Biology and Medicine, College of Life Sciences and Health, Wuhan University of Science and Technology, Wuhan 430065, China

摘要： Chronic endometritis is a common gynecological disease resulting from various long-term recurrent infections, and is closely related to myositis, miscarriage, and even infertility. There is still no satisfactory treatment method currently in clinical therapy. Mesenchymal stem cell (MSC)-derived exosomes, an important kind of paracrine product, have been used to treat inflammatory diseases due to their promising immunomodulatory function and tissue repair ability similar to MSCs. Considering that the exosome contents and functions are regulated by the MSC status and the MSC status is significantly influenced by its surrounding microenvironment, we propose a hypothesis that exosomes derived from inflammation-simulated MSCs will possess stronger inhibition ability for inflammation. Herein, we used IL-1β to activate rat bone MSCs for obtaining β-exo and constructed an injectable polypeptide hydrogel scaffold by loading β-exo (β-exo@pep) for an in situ slow release of β-exo. The results showed that the polypeptide hydrogel can provide a sustained release of exosomes in 14 days. The β-exo@pep composite hydrogel can more effectively inhibit the production of inflammatory factors such as TNF-α, IL-1β, and IFN-γ, while it can promote the production of anti-inflammatory factors such as Arg-1, IL-6, and IL-10. The β-exo@pep composite hydrogel significantly promoted cell migration, invasion, and vessel tube formation in vitro. The experiments in a rat model of endometritis proved that the β-exo@pep composite scaffold possessed excellent ability towards anti-inflammation and endometrial regeneration. The research studies on the molecular mechanism revealed that the protein expressions of HMGB1 and phosphorylated IKB-α and p65 are down-regulated in the cells treated with β-exo@pep, indicating the involvement of the NF-κB signaling pathway. This study provides an effective method for the treatment of chronic endometritis, which is promising for clinical use. © 2023 The Royal Society of Chemistry.

语种： 英文

作者： Qin, Yi;Chai, Bo;Wang, Chunlei;Yan, Juntao;Fan, Guozhi;...

期刊： Colloids and Surfaces A: Physicochemical and Engineering Aspects,2022年655:130197 ISSN：0927-7757

通讯作者： Chai, Bo(willycb@163.com)

作者机构： [Qin, Yi; Wang, Chunlei; Song, Guangsen; Chai, Bo; Yan, Juntao; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Bo Chai] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China

关键词： Adsorption performance;Carbon aerogel;Graphitization;Mechanism;Tetracycline

摘要： Tetracycline (TC) as an organic pollutant causes serious harm due to its difficulty in natural decomposition, and improving its removal performance has become the focus of attention. In this study, carbon aerogel (CA) with hierarchical porous structure was successfully synthesized by cross-linking polymerization of chitosan with glutaraldehyde and combined with high-temperature carbonization procedure. Through optimization, the CA800 obtained by carbonization at 800 °C has a good graphitization structure, which is the essential for its excellent adsorption performance, and the maximum adsorption capacity of TC can reach 210.79 mg/g under the optimal conditions. The process conforms to the pseudo-second-order kinetic model and the Freundlich isotherm model, indicating that chemisorption and multilayer adsorption play a dominant role; thermodynamic analysis confirms that the present adsorption system possesses endothermic and spontaneous properties. In addition, the CA800 adsorbent exhibits good reusability and convenient recovery properties. Normally, pore filling, π-π EDA interactions, hydrogen bonding and electrostatic interactions are considered as the main adsorption mechanisms for TC adsorption on carbon-based materials, but beyond that, the n-π EDA interactions present in this paper also play a prominent role. Consequently, this study makes it possible to optimize the graphitization of carbon-based adsorbents to improve their adsorption performance. © 2022

语种： 英文

作者： Fu, Manjun;Xu, Fang*;Yan, Juntao;Wang, Chunlei;Fan, Guozhi;...

期刊： Colloids and Surfaces A: Physicochemical and Engineering Aspects,2022年641:128610 ISSN：0927-7757

通讯作者： Xu, Fang;Chai, B

作者机构： [Wang, Chunlei; Song, Guangsen; Chai, Bo; Xu, Fang; Fu, Manjun; Yan, Juntao; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Chai, B ; Xu, F] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： Ascorbic acid;Ce-MOF;Colorimetric detection;Oxidase-like activity

摘要： It is indispensable to establish a simple, effective and accurate method for ascorbic acid (AA) detection since it plays a crucial role in human health. Herein, a novel oxidase mimic of mixed valence state cerium metal organic framework (MVCM) was successfully synthesized by in-situ partial oxidation of cerium metal organic framework (Ce-MOF). On account of the Ce (Ⅲ)/Ce (Ⅳ) redox couple inside, MVCM could directly catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to generate a blue color product (ox TMB) without adding H2O2, exhibiting a prominent intrinsic oxidase mimetic activity compared to Ce-MOF. Moreover, this catalytic mechanism of MVCM was further clarified by means of cyclic voltammetry (CV) test, UV–vis absorption spectra with O2 or N2 saturated condition and electron paramagnetic resonance (EPR) measurements. In the presence of AA, a redox reaction occurred between AA and ox TMB, and then resulting in a conspicuous blue color fading. By optimizing the testing conditions, a linear absorbance response was well correlated with the AA concentration ranging from 20 to 500 μM with a detection limit of 3.57 μM. MVCM also displayed the excellent selectivity and anti-interference performance for AA detection. Benefitting from the above, this AA detection method was applied in real Vitamin C effervescent tablets, showing a favorable reproducibility and feasibility. These results strongly indicated that the proposed method based on MVCM as an oxidase mimic might be a promising candidate for AA detection in food field. © 2022 Elsevier B.V.

语种： 英文

作者： Yang, Tao;Zhang, Yufei;Xu, Liujia;Zhu, Hao;Zhang, Juntao;...

期刊： ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2022年10(21):6963-6972 ISSN：2168-0485

通讯作者： Zheng, Mingming(zhengmingming@caas.cn)

作者机构： [Yang, Tao; Xu, Liujia; Zhang, Yufei; Huang, Fenghong; Zhu, Hao; Zheng, Mingming] Chinese Acad Agr Sci, Oil Crops Res Inst, Hubei Key Lab Lipid Chem & Nutr, Key Lab Oilseeds Proc,Minist Agr, Wuhan 430062, Peoples R China.;[Zheng, Mingming; Zhang, Juntao] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.;[Guo, Zheng] Aarhus Univ, Fac Tech Sci, Dept Biol & Chem Engn, DK-8000 Aarhus, Denmark.

通讯机构： [Mingming Zheng] O;Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Key Laboratory of Oilseeds Processing, Ministry of Agriculture, Wuhan 430062, China<&wdkj&>School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430023, China

关键词： pH-switchable;Pickering interface biocatalysis;enzymatic cascade reaction;rice bran oil;hollow mesoporous silica nanospheres

摘要： Herein, a pH-switchable Pickering interfacial biocatalysis (PIB) system is proposed and applied to a solvent-free biphasic biocatalysis. The oil-in-water emulsion was stabilized by amine-functionalized hollow mesoporous silica nanospheres (HMSS-N), which is functioned as emulsifiers of PIB and carriers of lipase AYS. The smart emulsifiers exhibited switch of the surface wettability behaviors in response to abrupt changes of pH. Under the optimality conditions, the immobilized lipase loading amount, activity, and expressed activity were 174.1 mg g-1, 9073 U g-1, and 52.1 U g-1 protein, respectively, at pH 6. Based on it, the hydrolysis of rice bran oil and esterification with phytosterols to produce phytosterol esters (PEs) were successfully performed. Compared with the conventional free enzyme one-phase system, the PIB system displays a higher reaction efficiency (catalytic efficiency value 6.88 mmol g-1 h-1, 20-fold enhancement). In addition, the system maintains 95% residual activity after 10 reaction cycles with 38.3 g products/g biocatalyst average productivity, complying with the requirements of industry-accepted standards. In each cycle, the demulsification is realized simply by in situ pH regulation. Therefore, this paper provides a powerful and green platform for oil-fat modification and stimuli-responsive interfacial biocatalysis with the advantages of a high efficiency, sustainability, a solvent-free process, and multi-recyclability. © 2022 The Authors. Published by American Chemical Society.

语种： 英文

作者： Xiong, Minghui;Yan, Juntao;Fan, Guozhi;Liu, Yanyu;Chai, Bo;...

期刊： Chemical Engineering Journal,2022年444:136589 ISSN：1385-8947

通讯作者： Chai, Bo(willycb@163.com)

作者机构： [Wang, Chunlei; Song, Guangsen; Chai, Bo; Xiong, Minghui; Yan, Juntao; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Liu, Yanyu] Tianjin Univ, Sch Sci, Dept Appl Phys, Tianjin 30072, Peoples R China.

通讯机构： [Bo Chai] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China

关键词： Biochar;Built-in electric field;Peroxymonosulfate;Radical and non-radical

摘要： The strong electronic interaction between heterogeneous composite catalysts facilitates the charge separation and transfer, which is favorable for the enhancement of catalytic performance. Herein, the rape straw derived biochar (BC) supported ultrafine Co3O4 composites were synthesized for tetracycline hydrochloride (TC) degradation via activating peroxymonosulfate (PMS), and the built-in electric field (BIEF) driven catalytic degradation mechanism was proposed. The results indicated that 20 wt% Co3O4/BC catalyst could achieve 90% degradation efficiency of TC within 20 min, and demonstrated that BC not only served as a support to significantly inhibit the agglomeration of Co3O4 nanoparticles and improve the stability of catalyst, but also behaved as an activator of PMS to participate in the catalytic degradation reaction. Both radical pathway (SO4·-, ·OH and O2·-) and non-radical process (1O2 and direct electron transfer) were involved in the Co3O4/BC/PMS system, and the role of the latter is more prominent, in which Co2+/Co3+ redox cycle and C = O groups on the BC were the possible active sites. Furthermore, the density functional theory (DFT) calculations revealed that a BIEF pointing from BC to Co3O4 at the interface was formed, which could act as the internal driving force for electron transfer to accelerate the redox cycle of Co2+/Co3+ and induce the direct electron transfer, and thus resulting in the better degradation of TC. This work not only offered a mechanistic insight into synergistic effects of composite catalyst in PMS activation, but also provided a win–win strategy of realizing the resource utilization of agricultural waste and environmental remediation simultaneously. © 2022 Elsevier B.V.

语种： 英文

作者： Chen, Wen-Qi;Yu, Ying-Qi;Cao, Ling;Yin, Miao-Miao;Liu, Yi;...

期刊： Chemical Communications,2022年58(100):13911-13914 ISSN：1359-7345

通讯作者： Jiang, Feng-Lei(fljiang@whu.edu.cn)

作者机构： [Cao, Ling; Liu, Yi; Jiang, Feng-Lei; Yu, Ying-Qi; Chen, Wen-Qi] Wuhan Univ, Coll Chem & Mol Sci, Sauvage Ctr Mol Sci, Wuhan 430072, Peoples R China.;[Yin, Miao-Miao] Hubei Normal Univ, Coll Chem & Chem Engn, Hubei Key Lab Pollutant Anal & Reuse Technol, Huangshi 435002, Peoples R China.;[Liu, Yi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Feng-Lei Jiang] S;Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China

摘要： Three common types of reversible inhibitors, namely competitive, noncompetitive and uncompetitive inhibitors, were designed and constructed by using enzymes with different surface charges and gold nanoparticles with different surface ligands and particle sizes. To our knowledge, it is the first time that an uncompetitive nano inhibitor has been discovered.

语种： 英文

作者： Xiong, Minghui;Qin, Yi;Chai, Bo*;Yan, Juntao;Fan, Guozhi;...

期刊： Chemical Engineering Journal,2022年428:131069 ISSN：1385-8947

通讯作者： Chai, Bo;Xu, Fang

作者机构： [Qin, Yi; Wang, Chunlei; Song, Guangsen; Chai, Bo; Xu, Fang; Xiong, Minghui; Yan, Juntao; Fan, Guozhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Chai, B; Xu, F] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： MCS-0.5;CoP nanoplates;Photocatalytic H-2 evolution;Charge separation

摘要： A series of MnxCd1-xS (0 < x < 1, marked as MCS-x) photocatalysts were synthesized by a facile hydrothermal method. The Mn-Cd-S solid solution and impurity phase of alpha-MnS would coexist in the as-prepared products once x >= 0.3. Among these photocatalysts, the MCS-0.5 sample exhibited the highest photocatalytic H-2 evolution rate of 5.540 mmol.g(-1).h(-1) with the lactic acid as sacrificial reagent, which may be due to the joint action of the formation of Mn-Cd-S solid solution promoting conduction band potential to enhance the reduction ability and Mn5 as the recombination center of photogenerated electron-hole pairs. Moreover, the photocatalytic H-2 evolution performance of MCS-0.5 sample was further significantly improved on coupling with CoP nanoplates as the cocatalysts, and the optimal loading content was 5 wt% with a H-2 evolution rate of 42.95 mmol.g(-1) h(-1), which was nearly 7.75 times higher than that of bare MCS-0.5 and even exceeded that of 1 wt% Pt/MCS-0.5. It could be found from the results of multiple characterization technologies that the excellent photocatalytic H-2 evolution activity of CoP/MCS-0.5 composites might be probably attributed to the more efficient transfer and separation of photogenerated charge carriers at the interface between CoP and MCS-x, and more active sites provided by the CoP nanoplates. This current work would clarify the role of Mn-Cd-S solid solution and impurity phase of MnS in the MCS-x samples during the photocatalytic reaction, and reveal that CoP nanosheets might replace Pt as an effective and non-noble metal cocatalyst for the photocatalytic H-2 evolution.

语种： 英文

作者： Sun, Ya;Guo, Minghui;Shu, Siwei;Ding, Deng;Wang, Chunlei;...

期刊： Applied Surface Science,2022年585:152605 ISSN：0169-4332

通讯作者： Yan, JT;Zhang, YX

作者机构： [Ding, Deng; Guo, Minghui; Wang, Chunlei; Sun, Ya; Shu, Siwei; Yan, Juntao] Wuhan Polytechn Univ, Coll Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Zhang, Youxiang; Zhang, YX] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.

通讯机构： [Yan, JT ; Zhang, YX ] W;Wuhan Polytechn Univ, Coll Chem & Environm Engn, Wuhan 430023, Peoples R China.;Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.

关键词： Cathode;Li-ion batteries;Li2MnO3;Nanowires;Structural defects

摘要： Li2MnO3, as a member of Li-rich and Mn-rich (LMR) layered oxides, has been considered as an appealing candidate for cathode preparation due to its high capacity and high voltage. Nevertheless, its commercialized application has been hindered by its demerits of poor ratability and capacity decay. Meanwhile, structural defects have been proven to influence the electrochemical activities of Li2MnO3. Herein, Li2MnO3 nanowires with varying numbers of structural defects were prepared and measured as cathode materials. rLMO-2 nws with the highest level of oxygen vacancies and the largest amount of Mn3+ were found to exhibit higher specific capacities, higher capacity retention rates, and better rate performances. In order to demonstrate the superiority of nanowire materials with large surface areas, the performance of nanowires materials was compared with that of nanobelt materials. As LIB cathodes within the voltage window of 2.0–4.8 V and at the rate of 0.1C, R-LMO-30 nbs were found to reach the specific capacities of 98.7, 119.1, 137.7, and 146.8 mAh g−1 in the 2nd, 5th, 10th, and 20th cycles, respectively, while rLMO-2 nws delivered the relatively high values of 170.7, 189.4, 196.4, and 162.3 mAh g−1, respectively. The rLMO-2 nws sample also showed an enhanced rate capacity. The superior electrochemical properties of the rLMO-2 sample were associated with the nanowire structure's large surface area, which could not only activate the Li2MnO3 phase quite easily but also enhance electron and ion transportation properties. This research revealed the influences of morphological control on the formation of surface structural defects in Li-rich layered oxides. And we believe our research findings will be helpful in providing a feasible strategy to enhance the electrochemical performance of Li-rich and Mn-rich layered oxides materials. © 2022 Elsevier B.V.

语种： 英文

作者： Jha, Sunil Kumar*;Zhang, Jian;Hayashi, Kenshi;Liu, Chuanjun

期刊： Journal of Food Science and Technology,2022年59(1):402-408 ISSN：0022-1155

通讯作者： Jha, Sunil Kumar

作者机构： [Jha, Sunil Kumar] Karnavati Univ, Unitedworld Sch Computat Intelligence, Gandhinagar 382422, India.;[Zhang, Jian] Wuhan Polytech Univ, Sch Chem & Environm Engn, Changqing Garden, Wuhan 430023, Hubei, Peoples R China.;[Liu, Chuanjun; Hayashi, Kenshi] Kyushu Univ, Grad Sch Informat Sci & Elect Engn, Dept Elect, Fukuoka 8190395, Japan.

通讯机构： [Jha, Sunil Kumar] K;Karnavati Univ, Unitedworld Sch Computat Intelligence, Gandhinagar 382422, India.

关键词： Banana;Odor;Characterization;Discrimination;PCA;HCA

摘要： The study aims identification of discriminating chemical constituents in the banana odor grown in Philippines and Ecuador using GC–MS characterization. Ester is recognized as a major chemical class in selected banana odor. Odors discriminating compounds like, 2-hexenal, ethyl acetate, and hexanoic acid, ethyl ester, etc. have been identified. Besides, other odors generating chemical compounds (alcohols, esters, aldehydes, and ketones) have been recognized. Furthermore, principal component analysis (PCA) and hierarchical cluster analysis were implemented to differentiate banana odors. PCA achieved 100% discrimination of selected bananas odors using the peak area information about recognizing chemical compounds. Odor identity and discrimination of selected bananas have been achieved successfully. © 2021, Association of Food Scientists & Technologists (India).

语种： 英文

作者： Zhang, Tingting;Bai, Haoyu*;Zhao, Yunliang;Ren, Bo;Wen, Tong;...

期刊： ACS Nano,2022年16(3):4930-4939 ISSN：1936-0851

通讯作者： Bai, Haoyu;Zhao, YL;Bai, HY

作者机构： [Zhang, Tingting] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.;[Bai, Haoyu; Chen, Licai; Zhao, YL; Ren, Bo; Zhao, Yunliang; Song, Shaoxian; Wen, Tong] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China.;[Bai, Haoyu; Chen, Licai; Zhao, YL; Ren, Bo; Zhao, Yunliang; Song, Shaoxian; Wen, Tong] Wuhan Univ Technol, Hubei Key Lab Mineral Resources Proc & Environm, Wuhan 430070, Hubei, Peoples R China.;[Bai, Haoyu] Imperial Coll London, Dept Mat, London SW7 2AZ, England.;[Komarneni, Sridhar] Penn State Univ, Dept Ecosyst Sci & Management, Energy & Environm Lab 204, University Pk, PA 16802 USA.

通讯机构： [Bai, HY; Zhao, YL ] W;[Bai, HY ] I;Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China.;Wuhan Univ Technol, Hubei Key Lab Mineral Resources Proc & Environm, Wuhan 430070, Hubei, Peoples R China.;Imperial Coll London, Dept Mat, London SW7 2AZ, England.

关键词： 2D nanofluidic channels;clay nanosheets;structural modification;ionic selectivity;clay membranes;separation of lithium and magnesium

摘要： Various kinds of clays occur naturally and are accompanied by particular cations in their interlayer domains. Here we report the reassembled membranes with nanofluidic channel arrays by using the natural clays montmorillonite, mica, and vermiculite, which were imparted with the natural selectivity for realizing precise recognition and directional regulation of the naturally occurring interlayer cations. A typical surface-governed ionic transport behavior was observed in the clay nanofluidic channels. Through asymmetric structural modification, cationic current rectification was realized in montmorillonite channels that performed as a nanofluidic diode. Interestingly, in the mica nanofluidic channel, the K+ that was naturally occurring in the interlayer domain of mica showed a reciprocating motion and resulted in a periodically fluctuating current. Electrodialysis demonstrated that such a fluctuating current reflects a directional selectivity for K+, achieving at least a 6000 times permeation rate difference with Li+ ions. The specific selectivity for Li+/Mg2+ on vermiculite reached up to 856 times with similar cations by the current technique. As-obtained clay membranes possess application prospects in energy conversion, brine resource development, etc. Such a strategy can achieve the designed selectivity through systematic screening of the building blocks, thus imparting them with the inherent characteristics of natural clays, which provides an alternative solution to the present manufacture of selective membranes. © 2022 American Chemical Society.

语种： 英文

作者： Zheng, Mingming;Xu, Ke;Yuan, Lianxin;Chen, Nan;Cao, Menghua

期刊： AEROSOL AND AIR QUALITY RESEARCH,2022年22(5) ISSN：1680-8584

通讯作者： Chen, N;Cao, MH

作者机构： [Zheng, Mingming] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Chen, Nan; Xu, Ke; Chen, N; Yuan, Lianxin] Hubei Environm Monitoring Ctr, Wuhan 430072, Peoples R China.;[Cao, Menghua; Cao, MH] Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China.

通讯机构： [Cao, MH ; Chen, N ] H;Hubei Environm Monitoring Ctr, Wuhan 430072, Peoples R China.;Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China.

关键词： Fine particle pH;Gas-particle partitioning;ISORROPIA;PM2.5 reduction

摘要： Fine particle (PM2.5) acidity greatly affects the formation of secondary aerosol, and the drivers of PM2.5 pH variation are vital in understanding its effects. Moderate PM2.5 acidity was found in Wuhan, a megacity of Central China, wherein 80% of PM2.5 hold pH values ranging from 2–4. Total ammonia (NHx) and sulfate contributed 79.1–93.7% to pH changes in spring and winter, while relative humidity was the largest contributor (33.7–36.3%) in summer and fall. By sensitivity simulations, PM2.5 remained acidic with pH changes less than 0.5 units in spring, summer and fall in foreseeable future even when the concentration varied by two orders of magnitude. While pH changes in winter were three times those in the other seasons, and NHx changes was suggested as the indicator of PM2.5 pH variation in winter. Furthermore, the impact of pH on PM2.5 responses to emissions control was evaluated. The pH has opposite influences on the effect of SO2 and NOx control in reducing PM2.5, the former being more effective at low pH and the latter being more effective at high pH due to ammonium and nitrate gas-particle partitioning. The effect of NHx control on PM2.5 reduction is nonlinearly affected by pH. It is directly effective at low pH, but more ammonia control is required before achieving effectiveness at high pH. For the current particulate pH of 3–4 in Wuhan, both SO2 and NOx control are beneficial for PM2.5 reduction. However, NHx control is less effective before it is reduced by approximately 20%. © The Author(s).

语种： 英文

作者： Yao, Lifeng;Zhang, Shengzu;Wang, Ruobing;Zhang, Lei;Wang, Yi;...

期刊： Desalination,2022年544:116141 ISSN：0011-9164

通讯作者： Zhang, Lei(zhanglei@whpu.edu.cn)

作者机构： [Wang, Ruobing; Yao, Lifeng; Yin, Weiyan; Zhang, Shengzu] Wuhan Text Univ, Sch Chem & Chem Engn, Hubei Key Lab Biomass Fibers & Ecodyeing & Finishi, Wuhan 430073, Peoples R China.;[Wang, Yi; Zhang, Lei] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Yao, Lifeng] Jiangxi Sci & Technol Normal Univ, Sch Chem & Chem Engn, Nanchang 330013, Peoples R China.

通讯机构： [Lei Zhang] S;[Weiyan Yin] H;Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China<&wdkj&>School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China

关键词： Functionalized;Gd(III) capture;Membrane;Oil-water separation;Polyester fabric;Zr-MOF

摘要： Efficient treatment of complex rare earth (RE) smelting wastewater has drawn great attention due to its potential environmental toxicity and the high demand of RE in modern technologies. However, it is still a challenge to achieve the simultaneous recovering RE and separating oil from wastewater. This study makes the first attempt to fabricate a versatile membrane, namely H-UiO-66-PF2, by loading 2-hydroxyphosphono acetic acid functionalized UiO-66 on polyester fabric through one-pot reaction strategy, and reports for the first time the simultaneous separation of oil/water mixtures and recovery of Gd(III). The H-UiO-66-PF2 exhibits standout oil/water separation performance with water flux up to 126,300 L·m−2·h−1 and separation efficiency above 99.8 %. Besides, the maximum adsorption capacity of H-UiO-66-PF2 for Gd(III) is reached 156.5 mg/g, adsorption equilibrium time is within 60 min. Moreover, the H-UiO-66-PF2 possesses high stability and recyclability, even after 20 cycles, separation efficiency and flux are 98.9 % and 105,200 L·m−2·h−1, respectively. Most notably, in addition to the separation of oil/water emulsion, complete Gd(III) capture is achieved from wastewater through filtration process. Therefore, this work provides a new design strategy to fabricate the composite membrane with great prospects for sophisticated smelting wastewater cleanup. © 2022

语种： 英文