作者机构：
[Fengjiao Quan; Pengfei Xu; Xiaolan Chen; Wenjuan Shen; Yun He; Jianfen Li] College of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Falong Jia] College of Chemistry, Central China Normal University, Wuhan 430079, China;[Guangming Zhan] School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
通讯机构：
[Falong Jia] C;College of Chemistry, Central China Normal University, Wuhan 430079, China
摘要：
Nitrate (NO3–) is a widespread pollutant in high-salt wastewater and causes serious harm to human health. Although electrochemical removal of nitrate has been demonstrated to be a promising treatment method, the development of low-cost electro-catalysts is still challenging. In this work, a phosphate modified iron (P-Fe) cathode was prepared for electrochemical removal of nitrate in high-salt wastewater. The phosphate modification greatly improved the activity of iron, and the removal rate of nitrate on P-Fe was three times higher than that on Fe electrode. Further experiments and density functional theory (DFT) calculations demonstrated that the modification of phosphoric acid improved the stability and the activity of the zero-valent iron electrode effectively for NO3– removal. The nitrate was firstly electrochemically reduced to ammonium, and then reacted with the anodic generated hypochlorite to N2. In this study, a strategy was developed to improve the activity and stability of metal electrode for NO3– removal, which opened up a new field for the efficient reduction of NO3– removal by metal electrode materials.
摘要：
The recovery of Au(III) has become a focal point of interest due to its significance in resource utilization and addressing environmental contamination. In this study, [C(3)NH(2)Mim]Cl-CMPS and PPh3-CMPS were successfully developed by immobilizing [C(3)NH(2)Mim]Cl and triphenylphosphine (PPh3) onto chloromethylated polystyrene beads (CMPS). The adsorbents demonstrated consistently high adsorption efficiency (>95 %) at a wide pH range. The [C(3)NH(2)Mim]Cl-CMPS and PPh3-CMPS exhibited exceptional selective adsorption ability for Au(III), and the adsorption process adhered to the PSO and Langmuir model. The adsorption efficiency of Au(III) remained constant after five consecutive cycles, highlighting outstanding reusability performance. Furthermore, as the existence of multiple coexisting metal ions, [C(3)NH(2)Mim]Cl-CMPS and PPh3-CMPS could efficiently and selectively capture Au(III) from the gold slag and PCBs lixivium, which is promising for Au recovery in practice.
摘要：
Poly (ethylene oxide) (PEO) is a potential material for solid-state lithium batteries. However, the present polymer electrolyte is hampered by its low ionic conductivity at room temperature and poor mechanical properties, which are significant barriers to its practical application. Herein, we designed a high-performance composite solid electrolyte (PLSP) by incorporating PEO, LiTFSI, and the solid plasticizer butanedinitrile into a 3D polyethylene terephthalate (PET) nonwoven framework with excellent mechanical properties. The PLSP achieved an impressive ionic conductivity of 5.45 x 10-4S cm-1, nearly 100 times higher than the original PEO electrolyte (6.1 x 10-6 S cm -1) at room temperature. Additionally, the optimized composite electrolyte exhibited an extended electrochemical window of up to 5.2 V vs. Li+/Li and a remarkable tensile strength exceeding 8.55 MPa. The stability of the lithium symmetrical battery's charge and discharge voltage platform after 400 h of cycling indicated favorable interfacial compatibility between the PLSP and lithium metal. Furthermore, the assembled Li/PLSP/LFP configuration displayed a discharge specific capacity of 131.4 mA h g-1 and a capacity retention of 93.8 % after 100 cycles at 1C at room temperature, highlighting the promising potential of the composite electrolyte for solid-state lithium batteries.
摘要：
In this work, hydrogel beads with 3D network structure were successfully prepared using montmorillonite nanosheets (MMTNS) combined with macromolecule polymers. Batch adsorption tests revealed that the increase in exfoliation degree of MMTNS was beneficial to improve the methylene blue (MB) adsorption on hydrogel beads (HB). In addition, the HB with 25 % MMTNS-3 dosage achieved high mechanical strength and reached the maximum adsorption capacity of 543.1 mg/g. Effects of MB concentration (40-120 mg/L), adsorbent dosage (1-1.5 g) and flow rate (5-15 mL/min) on fixed -bed column adsorption indicated that the HB column exhibited an excellent dynamic adsorption performance and recycling performance, much better than the D113 resin. The good fits of Pseudo -first -order model and Pseudo -second -order model and a better Langmuir model fitting result implied a monolayer chemical adsorption and physical adsorption nature of MB on HB. Moreover, scanning electron microscope combined with the energy dispersive spectrometer, fourier transform infrared spectroscope and X-ray photoelectron spectroscopy measurements indicated that the adsorption mechanism was mainly attributed to Ca ion -exchange and chemical bonding of -COOH and -OH groups with MB. Such hydrogel beads showed a good potential in the application of practical wastewater treatment.
作者机构：
[Yi, Liu; Xu, Zhao] School of Electrical and Electronic Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China;[Lisha, Xu] School of Physics, Hubei University, Wuhan, 430062, China;[Yunjun, Mei] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, Hubei, China;[Luocheng, Chen] Hubei Sino-Australian Nano Material Technology Co., Ltd., Guangshui, 432700, China;[Kuibo, Yin; Anqi, Zheng] SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, 210096, People's Republic of China
摘要：
In the last few decades, nanoparticles have been a prominent topic in various fields, particularly in agriculture, due to their unique physicochemical properties. Herein, molybdenum copper lindgrenite Cu(3)(MoO(4))(2)(OH)(2) (CM) nanoflakes (NFs) are synthesized by a one-step reaction involving α-MoO(3) and CuCO(3)⋅Cu(OH)(2)⋅xH(2)O solution at low temperature for large scale industrial production and developed as an effective antifungal agent for the oilseed rape. This synthetic method demonstrates great potential for industrial applications. Infrared spectroscopy and X-ray diffraction (XRD) results reveal that CM samples exhibit a pure monoclinic structure. TG and DSC results show the thermal stable properties. It can undergo a phase transition form copper molybdate (Cu(3)Mo(2)O(9)) at about 300°C. Then Cu(3)Mo(2)O(9) nanoparticlesdecompose into at CuO and MoO(3) at 791°C. The morphology of CM powder is mainly composed of uniformly distributed parallelogram-shaped nanoflakes with an average thickness of about 30nm. Moreover, the binding energy of CM NFs is measured to be 2.8eV. To assess the antifungal properties of these materials, both laboratory and outdoor experiments are conducted. In the pour plate test, the minimum inhibitory concentration (MIC) of CM NFs against Sclerotinia sclerotiorum (S. sclerotiorum) is determined to be 100ppm, and the zone of inhibiting S. sclerotiorum is 14mm. When the concentration is above 100nm, the change rate of the hyphae circle slows down a little and begins to decrease until to 200ppm. According to the aforementioned findings, the antifungal effects of a nano CM NFs solution are assessed at different concentrations (0ppm (clear water), 40ppm, and 80ppm) on the growth of oilseed rape in an outdoor setting. The results indicate that the application of CM NFs led to significant inhibition of S. sclerotiorum. Specifically, when the nano CM solution was sprayed once at the initial flowering stage at a concentration of 80ppm, S. sclerotiorum growth was inhibited by approximately 34%. Similarly, when the solution was sprayed once at the initial flowering stage and once at the rape pod stage, using a concentration of 40ppm, a similar level of inhibition was achieved. These outcomes show that CM NFs possess the ability to bind with more metal ions due to their larger specific surface area. Additionally, their semiconductor physical properties enable the generation of reactive oxygen species (ROS). Therefore, CM NFs hold great potential for widespread application in antifungal products.
摘要：
The photocatalytic valorization of glucose has attracted more and more attention for producing value-added chemicals. Herein, value-added chemicals like arabinose and formic acid were obtained by selective photocatalytic oxidation of glucose irradiated with visible light, which was realized using Bi2O3/TiO2 composite as the photocatalyst and atmospheric O2 as the oxidant in water. It was found that the photocatalytic performance of Bi2O3/TiO2 composite in the glucose oxidation was obviously superior to that of pure Bi2O3 and pure TiO2, the significantly enhanced photocatalytic efficiency was mainly attributed to the promotion of photogenerated charge separation and adsorption capacity towards glucose. The influences of mass ratio of Bi2O3 to TiO2 and initial concentration of glucose on the glucose oxidation were further investigated with many details. Additionally, recycling experiments showed that the Bi2O3/TiO2 composite exhibited a favorable stability in the photocatalytic process, and the roles of various active species for glucose oxidation were also determined by the active species trapping experiments. This work could provide some valuable viewpoints for producing value-added chemicals from biomass by photocatalysis.
作者机构：
[Xia, Yang; Ho, Wingkei] Educ Univ Hong Kong, Dept Sci & Environm Studies, Tai Po, Hong Kong 999077, Peoples R China.;[Xia, Yang; Ho, Wingkei] Educ Univ Hong Kong, Ctr Environm & Sustainable Dev CESD, Tai Po, Hong Kong 999077, Peoples R China.;[Zhu, Bicheng; Yu, Jiaguo; Yu, JG] China Univ Geosci, Fac Mat Sci & Chem, Lab Solar Fuel, Wuhan 430074, Peoples R China.;[Xia, Yang] Wuhan Inst Technol, Sch Chem Engn & Pharm, Minist Educ, Key Lab Green Chem Proc, Wuhan 430205, Peoples R China.;[Ho, Wingkei] City Univ Hong Kong, State Key Lab Marine Pollut, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China.
通讯机构：
[Ho, WK ] E;[Yu, JG ] C;Educ Univ Hong Kong, Dept Sci & Environm Studies, Tai Po, Hong Kong 999077, Peoples R China.;Educ Univ Hong Kong, Ctr Environm & Sustainable Dev CESD, Tai Po, Hong Kong 999077, Peoples R China.;China Univ Geosci, Fac Mat Sci & Chem, Lab Solar Fuel, Wuhan 430074, Peoples R China.
摘要：
Sluggish charge kinetics and moderate adsorption-desorption ability of gas molecules are major limitations for photocatalytic NOx elimination of bulk g-C3N4. A hierarchical porous g-C3N4 photocatalyst modified with N vacancies and charge channels (KCNN) was prepared by thermal polymerisation in KCl medium followed by quenching to increase the photocatalytic efficiency. The optimized KCNN sample exhibits highly enhanced photocatalytic NO removal rate (70.5%), which is superior to those of bulk g-C3N4 (38.1%), porous g-C3N4 (54.5%) and K-doped g-C3N4 (58.6%), respectively. X-ray photoelectron spectroscopy and electron paramagnetic resonance data reveal the successful formation of N vacancy in g-C3N4 framework. The enhanced activity of KCNN is ascribed to the enlarged surface area, expanded light absorption, low charge recombination efficiency and strong oxidation capability, respectively. In situ DRIFTS and density functional theory results suggest that the introduction of N vacancies and K+ ions enable control over NO adsorption and activation, leading to the implementation of a preferred pathway (NO -> NO+ -> NO3-) and reduction in the emission of toxic in-termediates. This work presents a potential idea for improving the charge transfer of layered materials and optimising the diffusion/adsorption/activation of gas molecules for photocatalytic NO oxidation.
作者机构：
[Shu, Jing; Hu, Jie; Wang, Zhen; Liang, Hongtan; Xu, Bing; Zhang, Zhipeng; Zhang, Lei; Fan, Guozhi; Pan, Dehua] Hubei Provincial Engineering Technology Research Center of Agricultural and Sideline Resources, Chemical Engineering and Utilization, School of Chemistry and Environmental Engineering, Wuhan Polytechnic University Wuhan 430023 China xubing200806@163.com
通讯机构：
[Xu, Bing] H;Hubei Provincial Engineering Technology Research Center of Agricultural and Sideline Resources, Chemical Engineering and Utilization, School of Chemistry and Environmental Engineering, Wuhan Polytechnic University Wuhan 430023 China
摘要：
Polyimide aerogels (PIAs) not only possess excellent thermodynamic properties but also have a high porosity structure, making them an exceptional protective and thermal insulation material, and further broadening their application scope in aerospace and other cutting-edge fields. In this work, a series of anisotropic polyimide aerogels (3,3',4,4'-biphenyltetracarboxylic dianhydride (S-BPDA), p-phenylenediamine (PDA), 4,4'-diaminodiphenyl ether (ODA)) with excellent properties were prepared. These PIAs were obtained by unidirectional freeze-drying and thermal amination of two different precursor solutions mixed in proportion. These PIAs possess an irregularly oval tubular structure, exhibiting pronounced anisotropy. (PIA-2 exhibits outstanding flexible resilience in the radial direction. It can still regain its original form after half an hour of compression by a universal testing machine, yet it cannot do so in the axial direction. The thermal diffusivity of PIA-5 in the radial direction at room temperature is as low as 0.067 mm(2) s(-1), and even at 200 °C, the thermal diffusivity is as low as 0.057 mm(2) s(-1). Meanwhile, the thermal diffusivity in the axial direction at room temperature is 0.11 mm(2) s(-1), surpassing the value of 0.106 mm(2) s(-1) of aerogels prepared from monomeric raw materials and dried under supercritical conditions). PIAs exhibit outstanding thermal stability (the axial strength and modulus retention of PIA-8 at 200 °C are as high as 52.63% and 44.82%), and its weight loss temperature of 5% is as high as 603 °C and it has a glass softening temperature of 387 °C. PIAs also demonstrate exceptional flame retardancy in imitation flame retardant experiments and exhibit outstanding thermal insulation performance when heated on a 150 °C heating plate for 10 minutes (the radial surface temperature of PIA-5 was only 49.9 °C). These anisotropic PIAs materials exhibit outstanding flexible resilience, and thermal protection performance, holding significant importance for their widespread adoption as thermal insulation materials in aerospace, high-precision electronic components, and other domains.
摘要：
The contribution systematically reviews the conceptual proposition, mechanism, catalyst species, applications, existing controversies and future developmental trends of self-immobilized polyolefin catalysts (SIPCs). To avoid the adverse effects in heterogenization of single site catalysts, the concept of self-immobilization was designed in order to not only keep the single site characteristics of catalysts but also improve polyolefin morphology control to reliver reactor fouling. The self-immobilized polyolefin catalysts have extended their territory from early-transition-metal to late-transition-metal ones, and been applied to produce high value-added polyolefins. Due to the lack of direct evidences, the classic self-immobilization mechanism invokes huge controversies, and the nature of self-immobilization needs to be explored in depth and explained by a more insightful theory. Fortunately, the self-immobilized polyolefin catalysts have been developed into the flexible immobilization modes of more robust product morphology control.
摘要：
Ultrasound (US)-mediated sonodynamic therapy (SDT) has received extensive attention in pathogen elimination for non-invasiveness and high spatial and temporal accuracy. Considering that hydrogel can provide a healing-friendly environment for wounds, in this work, hybrid hydrogels are constructed by embedding Ag doped TiO(2) nanoparticles in chitosan-polyvinyl alcohol hydrogels for enhanced sonodynamic antibacterial therapy. With metal silver doped, TiO(2) nanoparticles sonosensitivity is improved to generate more reactive oxygen species (ROS), which endows hybrid hydrogels with high-efficient antibacterial properties. In vivo results show that hybrid hydrogel dressing can prevent infection and promote wound closure within 2days. The healing ratio excess 95% with no pus produced at the end of treatment. The therapeutic mechanism was identified that heterojunction formed in Ag doped TiO(2) facilitates the separation of charge carriers under US irradiation, leading to elevating ROS generation. The generated ROS promote hybrid hydrogels sonodynamic antibacterial therapeutic efficacy to thoroughly eliminate pathogen via disrupting bacterial cell membrane integrity, decreasing membrane fluidity and increasing membrane permeability. Besides, biofilm formation could be effectively inhibited. This work developed a hybrid hydrogel with amplified SDT effect for wound healing, which is expected to provide inspiration of hybrid hydrogels design and Ti-based nanomaterials sonosensitivity enhancement.
期刊：
Chemical Engineering Journal,2024年481:148501 ISSN：1385-8947
通讯作者：
Bo Chai
作者机构：
[Junxin Huang; Bo Chai; Jiangrong Xiao; Guozhi Fan; Guangsen Song] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China;[Xiaohu Zhang] College of Chemistry, Huazhong Agricultural University, Wuhan 430070, P. R. China
通讯机构：
[Bo Chai] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China
摘要：
One of the most crucial strategies for transforming solar energy into sustainable hydrogen energy is photocatalytic H2 evolution, and constructing an effective and durable photocatalyst remains a difficult task. Herein, a 1D/3D Co9S8/Mn0.3Cd0.7S Schottky heterojunctions were successfully fabricated by three-step hydrothermal procedure, in which 3D Mn0.3Cd0.7S solid solution particles were immobilized on the 1D tube-like Co9S8 surface, allowing for extremely effective charge separation and transfer. Through coupling Co9S8 with Mn0.3Cd0.7S, the photocatalytic H2 evolution activity and stability were significantly boosted. The 7 % Co9S8/Mn0.3Cd0.7S heterojunction possessed the highest photocatalytic activity with the H2 evolution rate of 1586.4 μmol⋅h−1, which was 3.73 times larger than that of pristine Mn0.3Cd0.7S, corresponding to 21.8 % apparent quantum efficiency (AQE) at 420 nm monochromatic light. The Schottky heterojunction mechanism between Co9S8 and Mn0.3Cd0.7S could plausibly explain the enhanced photocatalytic H2 evolution performance, according to density functional theory (DFT) calculations and ultraviolet photoelectron spectroscopy (UPS) measurements. This investigation would offer the useful insights to develop Co9S8 cocatalyst for application in photocatalytic H2 evolution.
摘要：
BACKGROUND: This study reported a canola meal-based biochar adsorbent for highly efficient organic dyes removal. SEM, BET, Zeta-potential and XPS etc. were employed to characterize the micro-structure and chemical composition of the biochar, demonstrating the impact of compression treatment on its inner pore structure.RESULTS: KOH-activated carbonized canola meal-compressed (KCCM-C) showed a high specific surface area of up to 2135 m(2) g(-1) with an average pore size of 2.65 nm, which exhibited excellent adsorption capacity for both positively and negatively charged dyes with maximum values of 985 mg g(-1) and 813 mg g(-1) for methylene blue (MB) and methyl orange (MO) respectively, exceeding majority of the biochar adsorbents reported so far. The dye adsorption behavior was dominated by monolayer coverage with both physical adsorption and chemisorption. Langmuir isotherm model fitted well with the adsorption data, and the adsorption kinetic followed the pseudo-second-order model. Negative Gibbs free energy and positive enthalpy change indicated that the adsorption was a spontaneous endothermic process. XPS analysis indicated that the amino groups of proteins inside the canola meal as the active sites were oxidated by KOH prior to other components, while the compact structure of compressed canola meal was more conducive to the formation of uniform meso-pores inside canola meal-derived biochar improving its adsorption performance.CONCLUSIONS: This high-quality porous biochar, directly synthesized from the compressed canola meal, simplifies the grinding process and presents a valuable opportunity for the value-added application of canola meal.(c) 2023 Society of Chemical Industry (SCI).
作者机构：
[Zhu, Yu-Ying; Liu, Yi; Li, Shu-Lan; Hou, Hua-Ying] State Key Laboratory of Separation Membrane and Membrane Process, School of Chemistry & School of Electronic and Information Engineering, Tiangong University, Tianjin 300387, P. R. China;[Zhang, Yu-Juan; Duan, Meng-Die; Liu, Yi; Chu, Xu] School of Materials Science and Engineering & School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, P. R. China;[Liu, Junyi] Albany Medical College, New York 12208, United States;[Liu, Yi] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China
摘要：
Tumor-associated macrophages (TAMs) play pivotal roles in tumor development. As primary contents of tumor environment (TME), TAMs secrete inflammation-related substances to regulate tumoral occurrence and development. There are two kinds of TAMs: the tumoricidal M1-like TAMs and protumoral M2-like TAMs. Reprogramming TAMs from immunosuppressive M2 to immunocompetent M1 phenotype is considered a feasible way to improve immunotherapeutic efficiency. Notably, nanomaterials show great potential for biomedical fields due to their controllable structures and properties. There are many types of nanomaterials that exhibit great regulatory activities for TAMs' reprogramming. In this review, the recent progress of nanomaterials-involved TAMs' reprogramming is comprehensively discussed. The various nanomaterials for TAMs' reprogramming and the reprogramming strategies are summarized and introduced. Additionally, the challenges and perspectives of TAMs' reprogramming for efficient therapy are discussed, aiming to provide inspiration for TAMs' regulator design and promote the development of TAMs-mediated immunotherapy.
作者机构：
[Yadong Tang; Guoliang Bai; Zhenbin Wu] State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China;School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;University of Chinese Academy of Sciences, Beijing 100049, China;[Huan Liao] School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;[Qingjun Fang; Hang Yang] State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China<&wdkj&>School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
通讯机构：
[Hang Yang; Yi Zhang] S;State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China<&wdkj&>School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China<&wdkj&>State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China<&wdkj&>University of Chinese Academy of Sciences, Beijing 100049, China
关键词：
West Lake;Overlying water;Spatial variations;Seasonal differences;Sediments
摘要：
A comprehensive investigation of the physicochemical properties of overlying water and sediments in Hangzhou West Lake, China was conducted. A wide range of crucial physical parameters were analyzed, revealing significant spatial and seasonal differences. Total nitrogen (TN), total phosphorus (TP), and chemical oxygen demand (COD) concentrations in overlying water met the Class III limits (TN ≤2 mg/L, TP ≤0.2 mg/L, COD ≤20 mg/L) of the Environmental Quality Standard for Surface Waters (GB3838–2002), indicating relatively good overall water quality. However, concerns were raised regarding potential eutrophication, particularly evident during summer with explosive chlorophyll-a growth in certain lake areas like WH (266 mg/L) and XLH (239 mg/L). Lakes receiving direct diversion showed lower TN and TP versus non-diverted lakes. This research provides valuable insight into the complex nutrient dynamics and conditions of West Lake, improving understanding of lake ecosystem management and sustainable conservation strategies.
期刊：
Separation and Purification Technology,2024年339:126707 ISSN：1383-5866
通讯作者：
Yunliang Zhao<&wdkj&>Tingting Zhang
作者机构：
[Tong Wen; Bowen Kuang; Yupeng Sun; Ying Li; Huatao Wang; Licai Chen; Renbo Gao] School of Resources and Environmental Engineering, Wuhan University of Technology, 34 Wenzhi Street, Wuhan, Hubei 430070, China;State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei 430070, China;Wuhan Clayene Technology Co., Ltd., 36 Tangxunhu North Road, Wuhan, Hubei 430223, China;Facultad de Ciencias, Universidad Autonoma de San Luis Potosi, Av. Parque Chapultepec 1570, San Luis Potosi 78210, Mexico;[Tingting Zhang] School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, 68 Xuefu South Road, Wuhan, Hubei 430023, China
通讯机构：
[Yunliang Zhao; Tingting Zhang] S;School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, 68 Xuefu South Road, Wuhan, Hubei 430023, China<&wdkj&>School of Resources and Environmental Engineering, Wuhan University of Technology, 34 Wenzhi Street, Wuhan, Hubei 430070, China<&wdkj&>State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, Wuhan, Hubei 430070, China<&wdkj&>Wuhan Clayene Technology Co., Ltd., 36 Tangxunhu North Road, Wuhan, Hubei 430223, China
摘要：
The novel two-dimensional (2D) channel membranes have great potential for effective Li+/Mg2+ separation due to the rapid ion transport and precise adjustment of their channels. However, the solution composition greatly affects the control of channel height, resulting in an unsatisfactory selectivity performance. Herein, the 2D montmorillonite membranes are used to understand the causes of channel instability and explore the effective solutions. It is found that the changes in solution component can enlarge the channel height by changing the cross-linking constraint of Fe3+ between MMT nanosheets, thus leading to a weak sieving effect. To improve the channel constraint and its Li+/Mg2+ separation, the end face and interfacial layer constraint of nanosheets are proposed. As an effective strategy to strengthen the constraint effect, glutathione can modify the end faces of nanosheets and enhance the mutual binding force between them through its oxidative transformation. Besides, the construction of an interfacial layer can also limit channel swelling by altering the membrane hydration and wetting. These strategies will also form a synergistic regulatory effect. Consequently, a superior membrane is obtained and presents an improved selectivity of 8.89 at 100:1 Mg2+/Li+ ratio. These innovative approaches offer a valuable framework for creating high-performance 2D channel membranes, which can also support their wider application in the Li+/Mg2+ separation.
摘要：
Ammonia control has attracted attention due to the possibility for fine particles (PM(2.5)) mitigation. Based on past decade ammonia emissions assessments and future predictions, this study seasonally evaluated the ammonia emissions reduction potential in 2025 and 2030 in Wuhan, a Central China megacity, according to the short-term and long-term predictable policies. Furthermore, combined with the reduction potential, PM(2.5) components observation and thermodynamic model, the effectiveness of implementing ammonia emission control to reduce PM(2.5) by 2025 and 2030 was explored seasonally. Results indicated that the total ammonia emissions are expected to decrease by 19.6-33.9% in 2025 and 2030 under positive reduction scenarios, or increase by 8.9-11.7% in the absence of any intervention. Livestock holds the largest potential for reducing ammonia emissions accounting for 46.4-52.5% of the total. Improvement of human excrement management in rural regions also contributes a 35-37% potential. Despite the implementation of exhaust requirements, ammonia emissions from vehicles in 2030 are expected to continue to increase by 55.3% and 23.5% under the regular (S1) and enhanced (S2) reduction strategy scenarios, respectively. Seasonally, the most potential source of ammonia reduction in spring, summer and fall remains livestock. While in winter, non-agricultural sources dominate the reduction potential. Further results indicated that by ammonia control is expected to decrease PM(2.5) concentration up to 5% (less than 1 μg m(-3)) in 2025-2030. Despite the better effectiveness in winter, ammonia control won't be an effective way to reduce PM(2.5) in Central China in future, from the management policies and areal ammonia-rich conditions.
作者机构：
[Han, Qian; Qin, Zhenhua; Zhang, Wei; Wang, Pingping; Shu, Zaixi; Zhu, Lijie; Liu, Xiuying] School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430028, China;[Han, Qian; Zhang, Wei; Wang, Pingping; Shu, Zaixi; Zhu, Lijie; Liu, Xiuying] Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education Wuhan, Hubei 430028, China;[Zhang, Zexin; Yang, Min; Li, Xuepeng; Bai, Xinwen] College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China;[Qin, Zhenhua] School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430028, China
通讯机构：
[Xiuying Liu; Zhenhua Qin; Lijie Zhu] S;School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430028, China<&wdkj&>Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education Wuhan, Hubei 430028, China<&wdkj&>School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430028, China<&wdkj&>School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430028, China
关键词：
Amine vapor;Fish freshness;Fluorescent film;Ratiometric indicator;Sensing tag
摘要：
In this study, amine vapor-sensitive films with ratiometric fluorescence attributes were developed. The pH-sensitive fluorescein 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium salt (HPTS) and its tetraphenylethylene derivative (TPB) were selected as ratiometric indicators and incorporated into a polyvinyl alcohol (PVA) matrix to produce HPTS/TPB-PVA films. The films responded well to amine vapors, and the interference of aromatic vapors did not substantially affect the fluorescence signals of the films. Under UV light at a wavelength of 365 nm, the fluorescence of the films changed from dark pink to light pink and finally to yellow when the freshness of the fish was visually checked during storage. In addition, the color difference values of the films showed a positive correlation with the total volatile basic nitrogen (TVB-N), ranging from 12.7 to 24.8 mg/100 g at 25 °C and 8.4 to 25.6 mg/100 g at 4 °C, respectively. This indicates that fluorescent films have good potential for quantifying fish freshness in the near future when connected to an automatic data processing system based on color differences.
作者机构：
[Hu, Tao; Dong, Hao; Wang, Guangjin; Gong, Xinghou; Wu, Chonggang; Dong, H; Guo, Lei; Zhu, Chuanhui; Zheng, Xuan; Wang, GJ] Hubei Univ Technol, Sch Mat & Chem Engn, Hubei Prov Key Lab Green Mat Light Ind, Wuhan 436800, Peoples R China.;[Wang, Guangjin] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 52800, Peoples R China.;[Dong, Hao] Zhongkai Univ Agr & Engn, Coll Light Ind & Food Technol, Guangzhou 510225, Peoples R China.;[Hu, Tao; Gong, Xinghou; Wu, Chonggang; Zheng, Xuan] Hubei Longzhong Lab, Xiangyang 441000, Peoples R China.;[Hou, Yuanjing] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430048, Peoples R China.
通讯机构：
[Dong, H ; Zheng, X; Wang, GJ] H;Hubei Univ Technol, Sch Mat & Chem Engn, Hubei Prov Key Lab Green Mat Light Ind, Wuhan 436800, Peoples R China.
关键词：
Ag nanowires;Biosensor;Food safety;MoS(2);Pesticide
摘要：
Thiabendazole (TBZ), a highly toxic phosphorothioate insecticide commonly used in postharvest fruit management, has the potential to cause detrimental effects on human health as an endocrine disruptor. In this study, an electrochemical sensor was developed to detect TBZ by modifying MoS(2) on silver nanowires (Ag NWs@MoS(2)) and integrating them onto a glassy carbon surface. Cyclic voltammetry revealed that TBZ underwent an irreversible, diffusion-controlled process on Ag NWs@MoS(2), leading to a two-fold increase in peak current compared to unmodified MoS(2). Square wave voltammetry facilitated TBZ detection, and the sensor exhibited a linear range of 0.05-10μM with a high coefficient of determination (R(2)=0.9958) and a limit of detection (LOD) of 1.75nM (signal-to-noise ratio=3). The sensor's applicability for food safety monitoring was verified through TBZ analysis in pear and apple samples, achieving recoveries of 95.5-103.6% with RSDs in the range of 1.98-3.25%.
摘要：
Granite waste powder (GWP) is a solid waste produced during stone processing, and its accumulation has brought serious environmental and ecological problems. Due to its rich Si and Al components, GWP is a potential raw material for the preparation of geopolymers, but its low reactivity limits its utilization. This study aimed to enhance the reactivity of GWP toward geopolymer preparation by mechanical activation. During mechanical activation, the particle size of GWP decreased rapidly, and its internal pore volume gradually increased, which made its specific surface area continuously increase. The relative crystallinity of the main mineral phases in GWP decreases continuously with mechanical activation, and the aluminosilicate minerals (including albite, microcline, and biotite) are more easily amorphized than quartz. Leaching tests show that activated GWP can dissolve higher percentages of silicon and aluminum components in alkaline solutions. After 120 min of activation, the dissolution percentage of Si increased from 1.55% to 6.25%, and that of Al increased from 4.83% to 20.86%. The reaction heat result shows that the early geopolymerization involving activated GWP releases higher cumulative heat, which reflects a higher degree of reaction. Also, geopolymer incorporated with activated GWP, its compressive strength increased from 50.83 MPa to 78.94 MPa, and its flexural strength increased from 7.2 MPa to 10.0 MPa. These results confirmed that the reactivity of GWP can be significantly enhanced by mechanical activation. This technology may provide an efficient and promising method to improve the reactivity of GWP and promote its utilization in the preparation of geopolymers.
