通讯机构：
[Long Zhao] S;State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
摘要：
Gold recovery from secondary resources involves tremendous environmental and economic implications. In this work, four nucleobase (guanine, xanthine, hypoxanthine and adenine) modified cellulose microspheres were synthesized via radiation method for Au(III) capture from actual gold slag solution. The adsorption rapidly achieved equilibrium within 4 h. It was discovered that the pseudo-second-order and Langmuir model provided a superior match for the Au(III) adsorption process on adsorbents. At the optimal pH, the four adsorbents exhibited the outstanding adsorption capacities for Au(III) with a range of 307.69-510.20 mg/g. Furthermore, cellulose microspheres bearing nucleobase were able to selectively adsorb trace Au(III) with recovery efficiencies of 62 %- 70 % from gold slag leaching solution. In addition, the column separation approach was utilized to better assess the applicability of adsorbents, proving that cellulose microspheres bearing nucleobase exhibited great benefits and prospects in industrial applications. The N-containing groups on adsorbents captured Au(III) by ion ex-change, chelation and oxidation-reduction. The low-cost nucleobase-bearing adsorbents offer a new prospect for nucleobase in environmental remediation and water treatment.
关键词：
Two-dimensional nanochannel membrane;Montmorillonite;Separation of Li + and Mg 2+;Porous nanochannel
摘要：
Recent innovations have created various two-dimensional membranes to break the Li+/Mg2+ selectivity limit of traditional separation membranes. However, the simultaneous achievement of ultrafast transport and high selectivity is still below the theoretical prediction. Herein, for overcoming these shortcomings, the twodimensional montmorillonite membrane (2D MMT membrane) consisting of sulfonated polyvinyl alcohol (SPVA), ethylene glycol (EG), and polyacrylamide (PAM) is proposed based on the design of porous 2D nano channels. It is found that the SPVA can effectively improve the membrane stability, but will densify the channel, and prevent ion transport. When the appropriate EG is included in the membrane component, the transport rate of Li+ can be increased from 0.29 mol h-1 m- 2 to 0.56 mol h-1 m- 2. However, because the transport of Mg2+ needs to overcome the high dehydration energy barrier, the JMg2+ changes little, hence increases in SLi+Mg2+ from 4.1 to 7.3. In addition, the selectivity regulation of PAM can be further integrated, and the permselectivity of the membrane is improved to 9.2 due to the strong selective coordination of amide groups to Mg2+. This novel strategy provides a valuable reference for developing high-performance 2D MMT membranes, which can also promote the application of 2D membranes in the Li+/Mg2+ separation.
摘要：
The magnetic CuFeO2 anchored on nitrogen-doped porous carbon (CuFeO2/NC) hybrid catalysts were further synthesized via hydrothermal reaction without the addition of a chemical reductant. The systematic CuFeO2/NC with larger specific surface areas (SSAs) and abundant active sites exhibited strong adsorption ability and great catalytic performance towards activating peroxymonosulfate (PMS) for sulfamethoxazole (SMX) removal. It was noted that 18 mg/L SMX was completely removed after 40 min of pre-adsorption and 30 min of oxidative degradation in CuFeO2/NC and PMS system. The degradation rate constant (k) was calculated by fitting as 0.166 min-1, being about 7.9 times that in the CuFeO2 and PMS system (0.021 min-1). The SO4 & BULL;-,& BULL;OH, and 1O2 as the dominant reactive oxygen species (ROSs) contributed to sulfamethoxazole degradation. The N species, active oxygen and the redox cycles of Cu(II)/Cu(I) and Fe(III)/Fe(II) were confirmed to play a vital role in the activation of PMS for the generation of ROSs. Based on the LC-MS analysis, the possible degradation routes of SMX in the PMS activation system by CuFeO2/NC were proposed.
作者机构：
[Shen Y.-Q.; 张智勇; 宋垚; 王新杰; 兰庚; 吴胜莉] Department of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, China;[汪相如] School of Electronic Science and Engineering, University of Electronic Science and Technology, Chengdu, 611730, China
通讯机构：
[Zhang, Z.-Y.] D;Department of Chemistry and Environmental Engineering, China
关键词：
三苯二炔类液晶;低熔点;高双折射;合成;高频介电性能
摘要：
液晶微波通信器件所用的液晶材料都是高双折射率（Δn）液晶化合物组合而成，这些化合物的熔点大多较高，使得液晶组合物的低温共熔点较高，不利于微波通信器件的发展。本文合成了8种侧乙基三苯二炔类液晶化合物，将其按照一定的比例配置成低温共熔点在-46 ℃的液晶组合物MA，并以此为液晶母体，将其与另外几种液晶混合，采用矩形谐振腔微扰法测试液晶组合物在微波频段（11~35 GHz）的介电性能，得到了在18 GHz时的介电常数值（Δεr）为0.954，最大介电损耗（tanδεr max）为0.008 6，可满足微波用低熔点液晶材料的性能要求。 The liquid crystal materials used for liquid crystal microwave communication devices are composed of high birefringence liquid crystal compounds, most of which have higher melting points, making the liquid crystal compositions have higher low temperature eutectic points, unfavorable for the development of microwave communication devices. In this paper, eight kinds of fluorinated ethyl triphenyldialkyne liquid crystal compounds were designed and synthesized, and configured them in a certain ratio to form a liquid crystal composition MA with a low-temperature co-melting point around -46 ℃. And we mixed them with several other liquid crystals and tested the dielectric properties of the liquid crystal compositions in the microwave frequency band (11~35 GHz) using the rectangular resonant cavity perturbation method, and obtained a dielectric constant value (Δεr) of 0.954 at 18 GHz, the maximum dielectric loss is (tanδεr max) 0.008 6, which meets the performance requirements of low melting point liquid crystal materials for microwave applications.
作者：
Min Tu;Yin Li;Junli Chang;Guangyuan He;Yaqiong Wang
期刊：
Foods,2023年12(5):976- ISSN：2304-8158
通讯作者：
Chang, J.;Li, Y.
作者机构：
[Guangyuan He] The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan 430074, China;These authors contributed equally to this work.;Hubei Technical Engineering Research Center for Chemical Utilization and Engineering Development of Agricultural and Byproduct Resources, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China;Authors to whom correspondence should be addressed.;[Min Tu] Hubei Technical Engineering Research Center for Chemical Utilization and Engineering Development of Agricultural and Byproduct Resources, School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China<&wdkj&>These authors contributed equally to this work.
通讯机构：
[Yin Li; Junli Chang] T;The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, The Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan 430074, China<&wdkj&>Authors to whom correspondence should be addressed.
摘要：
Cereal crops are of great importance in the development of human civilization and fall into two groups, major crops and minor crops [...]
摘要：
Manganese dioxides (MnO2) and biochar materials are both desirable candidates for environmental remediation of toxic organic pollutants (TOPs) in water due to wide availability and environmental-friendly. In practical application, however, MnO2 suffers from low redox activity owing to deprotonation, while biochar is subject to limited removal capacity. Herein, a difunctional engineering sulfuric acid-pretreated biochar supporting MnO2 composite (MBC-A) was firstly synthesized and optimized to remove various TOPs from aqueous solution. Specifically, sulfuric acid not only served as an active agent to improve the specific surface area of biochar for improvement of adsorption capacity and more MnO2 loading, but also facilitated the introduction of sulfonic acid groups (-SO3H) as an internal proton reservoir to inhibit inactivation of MnO2 due to deprotonation in alkaline. Thanks to adsorption and oxidation, MBC-A showed excellent removal capacity (214.9 mg/g) and fast reaction kinetics (360 min) for tetracycline (TC), exceeding precursor and other materials reported in literature. Importantly, the effective operation pH range of MBC-A was broadened to 1-13 with the help of buffering capacity of -SO3H groups. The dominant driving force of adsorption were pi-pi interaction and hydrogen bond; while reactive oxidative species were mainly ascribed to singlet oxygen (O-1(2)), hydroxyl radical (center dot OH) and reactive Mn3+. The possible reactive sites and pathway were investigated by combining experimental results with density functional theory (DFT) calculation. Further, the results of multiple cyclic runs, removal in real river water and toxicity assessment demonstrated well reusability, high environmental security, and excellent practical applicability of MBC-A.
摘要：
Traumatic nerve defects result in dysfunctions of sensory and motor nerves and are usually accompanied by pain. Nerve guidance conduits (NGCs) are widely applied to bridge large-gap nerve defects. However, few NGCs can truly replace autologous nerve grafts to achieve comprehensive neural regeneration and function recovery. Herein, a three-dimensional (3D) sponge-filled nanofibrous NGC (sf@NGC) resembling the structure of native peripheral nerves was developed. The conduit was fabricated by electrospinning a poly(L-lactide-co-glycolide) (PLGA) membrane, whereas the intraluminal filler was obtained by freeze-drying a collagen-based matrix (ColM) resembling the extracellular matrix. The effects of the electrospinning process and of the composition of ColM on the physicochemical performance of sf@NGC were investigated in detail. Furthermore, the biocompatibility of the PLGA sheath and ColM were evaluated. The continuous and homogeneous PLGA nanofiber membrane had high porosity and tensile strength. ColM was shown to exhibit an ECM-like architecture characterized by a multistage pore structure and a high porosity level of over 70%. The PLGA sheath and ColM were shown to possess stagewise degradability and good biocompatibility. In conclusion, sf@NGC may have a favorable potential for the treatment of nerve reconstruction.
期刊：
Journal of Electroanalytical Chemistry,2023年929:117093 ISSN：1572-6657
通讯作者：
Lihong Xue<&wdkj&>Wuxing Zhang
作者机构：
[Chen, Weilun; Xue, Lihong; Liao, Yaqi; Guo, Yixuan; Zhang, Wuxing; Peng, Jiayu] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China.;[Chen, Kongyao] Zhongyuan Univ Technol, Ctr Adv Mat Res, Henan Key Lab Funct Salt Mat, Zhengzhou 450007, Peoples R China.;[Wan, Min; Zeng, Rui] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Meng, Jintao] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect WNLO, Wuhan 430074, Peoples R China.
通讯机构：
[Lihong Xue; Wuxing Zhang] S;State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
摘要：
The instability of the solid-liquid interface is a crucial problem of the silicon (Si) anode, which seriously affects the performance of the battery. Therefore, constructing an artificial interface for silicon (Si) anodes is an effi-cient way to restrain the volume expansion and reduce the side reactions. Herein, we develop a poly(acryloni-trile)-Sulfur (PAN-S) based artificial solid-electrolyte interphase (SEI) film on Si, which significantly improves the cycling and rate performance owing to its mechanical strength and ion transport ability. The PAN-S coated silicon anode exhibits outstanding electrochemical performance, which shows a good cycle life of 1370 mAh g-1 capacity retained after 500 cycles at 0.5C (1C = 4000 mA g-1) and outstanding rate performance of 1103 mAh g-1 retained at 4C. This work provides a facile surface engineering strategy for designing electrode mate-rials with significant volume expansion and poor electrochemical kinetics.
通讯机构：
[Zhandong Ren; Yuchan Zhu] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, PR China<&wdkj&>School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan, 430023, PR China
摘要：
The research and development of high-efficiency low-temperature disinfection technology in all aspects of coldchain food has begun to receive attention. This paper aims to develop low temperature acidic electrolyzed water (LT-AEW) disinfectant. The anti-freezing temperature, disinfection efficiency and practical application effect were evaluated in detail. The results had shown that the freezing point of AEW can be reduced to -18 degrees C by adding 25% CaCl2, 20% NaCl, 30% ethylene glycol (EG) and 35% propylene glycol (PG). At the low temperature (-1, -10 and -18 degrees C), the bactericidal efficiencies of all EG-acidic electrolyzed waters (EG-AEWs) with different EG contents were close. The reason is that although the low temperature environment will reduce the sterilization efficiency of EG-AEW, the addition of EG can promote the increase of HClO content in EG-AEW, thus increasing the sterilization efficiency. As long as the HClO content reached 35.2, 50.8 and 64.3 mg L-1, the killing logarithm (KL) value had achieved 4.50, 4.49 and 5.07 log10(CFU mL-1). Finally, the KL values of EGAEW against Escherichia coli on the corrugated board and stainless-steel board both exceeded 3 log10(CFU mL-1) at the low temperature, which indicates that EG-AEW can be applied in food cold chain.
摘要：
A novel procedure of dual direct immersion single-drop microextraction (DDI-SDME) was developed for the sequential separation and preconcentration of Fe(III) and Fe(II) followed by graphite furnace atomic absorption spectrometry determination. At pH 1.5, Fe(III) can selectively react with N-benzoyl-N-phenylhydroxylamine (BPHA) to form the hydrophobic complexes which can be extracted into one organic drop, while Fe(II) remained in the solution. Then, another organic drop containing BPHA was immersed in the sample solution after the extraction of Fe(III) for the preconcentration of Fe(II) at pH 4.5. This procedure eliminated the time-consuming and labor-intensive step of oxidation of Fe(II) or reduction of Fe(III), which may cause the incomplete conversion of the species and sample contamination. Main conditions influencing the separation and enrichment of Fe species were studied. Under the selected conditions, the detection limits of this procedure were 0.058 ng mL(-1) and 0.074 ng mL(-1) for Fe(III) and Fe(II) with relative standard deviations of 4.8% and 5.6%, respectively. Enrichment factors of 300-fold were obtained for Fe species. The proposed procedure was successfully utilized for detecting Fe(III) and Fe(II) in food samples. To evaluate accuracy of this procedure, a certified reference material of milk powder was analyzed, and the determined value was in good agreement with the certified value.
通讯机构：
[Peng Jiang; Yi Liu] C;College of Chemistry and Molecular Sciences & School of Pharmaceutical Sciences, Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (MOE), Wuhan University, Wuhan 430072, P. R. China<&wdkj&>School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, P. R. China<&wdkj&>State Key Laboratory of Separation Membrane and Membrane Process & Tianjin Key Laboratory of Green Chemical Technology and Process Engineering, School of Chemistry, Tiangong University, Tianjin 300387, P. R. China<&wdkj&>College of Chemistry and Molecular Sciences & School of Pharmaceutical Sciences, Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (MOE), Wuhan University, Wuhan 430072, P. R. China<&wdkj&>Hubei Jiangxia Laboratory, Wuhan 430023, P. R. China
摘要：
The fibrillation process of human insulin (HI) is closely related to the therapy for type II diabetes (T2D). Due to changes in the spatial structure of HI, the fibrillation process of HI takes place in the body, which leads to a significant decrease in normal insulin levels. L-Lysine CDs with a size of around 5 nm were synthesized and used to adjust and control the fibrillation process of HI. ThT fluorescence analysis and transmission electron microscopy (TEM) characterization of the CDs showed the role of HI fibrillation from the perspective of the kinetics of HI fibrillation and regulation. Isothermal titration calorimetry (ITC) was used to explore the regulatory mechanism of CDs at all stages of HI fibrillation from the perspective of thermodynamics. Contrary to common sense, when the concentration of CDs is less than 1/50 of the HI, CDs will promote the growth of fibres, while a high concentration of CDs will inhibit the growth of fibres. The experimental results of ITC clearly prove that different concentrations of CDs will correspond to different pathways of the combination between CDs and HI. CDs have a strong ability to combine with HI during the lag time, and the degree of combination has become the main factor influencing the fibrillation process.
摘要：
Trioctylphosphine (TOP) is widely used in the synthetic process of colloidal quantum dots (QDs). However, its role has not been fully elucidated yet. Herein, the role of TOP was revealed by kinetic studies with spectroscopic methods. It was found that TOP suppressed the growth rate but increased the solubility; hence, it modulated QDs by controlling both. The extent of impact from TOP varied in the length of acids that was used in QD synthesis. In general, the impact from TOP to QDs synthesized by short acids was mainly the suppressing effect because shorter aliphatic acids had a higher diffusion rate, and they might suffer from TOP a lot. On the contrary, longer aliphatic acids diffused intrinsically slowly, so the reaction rate was rarely influenced by TOP, but the solubility was supposed to be considered at this time. This difference also led to the optimal amount of TOP used in the synthesis. These results pointed out that both the growth rate and solubility were time-dependent and should be considered to obtain high-quality QDs. In addition, the initial nucleation procedure was also seemingly suppressed by TOP. This work not only shed light on the underlying role of TOP and convinced the controllable synthesis of QDs but also provided a method to investigate the behavior of QD growth by considering several conditions synergistically and dynamically.
关键词：
Holocellulose;Wheat straw;Acetylation;Preparation;Bio-based film
摘要：
Holocellulose extracted from wheat straw was acetylated and used to prepare biodegradable composite film. An efficient catalytic system for the acetylation of holocellulose was explored by evaluating the influence of type and the amount of catalyst on the degree of substitution (DS) of acetylated holocellulose (AHC). The DS of AHC reached 2.16 when using p-toluene sulfonic acid and sulfuric acid as co-catalyst. AHC was further used to prepare composite film in the presence of reinforcer and plasticizer, and the influence of DS value of AHC on the properties of composite film was investigated. The tensile strength, elongation at break and Young's modulus of the composite film derived from AHC with DS value of 2.16 were 9.51 MPa, 82.66% and 54.43 MPa when using chitosan and polyvinyl alcohol as the reinforcers, sorbitol and glycerol as the plasticizers. The UV-blocking performance and degradation of AHC-based composite film were also performed. It was found that about 90% UV light was absorbed and 59.2% was decomposed after biodisintegrating for 30 d. The excellent comprehensive performance of the AHC-based composite film reveals application prospect of holocellulose in the field of biodegradable materials.
