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SSRN 2023年

作者： Liu, Xueqin Wang, Jingnan Lin, Kaijie Cao, Yu Ran, Jianhua Chen, Yihuang Li, Yingzhe Hu, Xiaoqin Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing Wuhan Textile University Wuhan430200 China State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan430074 China College of Chemistry and Materials Engineering Wenzhou University Wenzhou325035 China

Hematite (α-Fe2O3) has emerged as a promising candidate for photoelectrochemical (PEC) water oxidation. Modulating its composition is pivotal for obtaining highly efficient PEC performance. However, an oxygen-rich surface is formed from the FeOOH precursor, resulting in poor surface charge transfer. In this work, for the first time, Fe nanoparticles were deposited on the surface of α-Fe2O3 to reduce the surface oxygen content. Subsequently, the oxygen vacancy (Vo) and hydrogen (H) impurity defects were introduced to further control the chemical composition of Fe2O3. The introduction of Vo can increase the charge carrier density, while the charge transport mobility is reduced due to the low hopping process of small polarons induced by Vo. To address the problem, we show that a shallow-level defects are created via H doping, which extracts the trapped electrons out of the Vo-induced trap states. Due to the formation of homogeneous distribution of Fe and O, introduction of Vo and the incorporation of shallow-level defects by H impurity, charge separation efficiency were markedly improved. Consequently, the photocurrent density of α-Fe2O3 photoanode was increased from 0.76 to 1.71 mA cm-2 at the potential of 1.23 V versus the reversible hydrogen electrode. Our work verifies the relationship between the PEC performance of semiconductor photoanode and its composition and provides promising opportunities for further optimization. © 2023, The Authors. All rights reserved.

关键词： Charge transfer

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Corrosion Products Regulation of Pretreated Zero-Valent Iron by Aluminum Chloride for Enhanced Chromium (Vi) Removal and Longevity Under Aerobic Conditions

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SSRN 2024年

作者： Long, Xuejun Li, Rui Wan, Jun Zhong, Zhenxing Ye, Yuxuan Yang, Jiazhi Luo, Jun Xiao, Zhonghua Xia, Jin Liu, Yaomeng School of Environmental Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China Engineering Research Center of Ministry of Education for Clean Production of Textile Dyeing and Printing Wuhan Textile University Wuhan430200 China Jiangsu Huashui Water Engineering Co. Ltd Nanjing210009 China Hubei Industrial Construction Group Co. Ltd Wuhan430076 China

The zero-valent iron (ZVI)-based material has been applied for hexavalent chromium (Cr(VI)) decontamination in wastewater treatment and groundwater remediation, but the passivation problem limited their field application. Currently, it is still a challenge to improve ZVI’s longevity and reactivity cost-effectively. In this study, we combined dissolved oxygen and aluminum chloride to regulate the corrosion products of pretreated ZVI (pcZVI-AlCl3) for enhancing its longevity and Cr(VI) removal behavior under aerobic conditions. The optimal pre-corrosion conditions were found to be 2.5 g/L ZVI, 0.5 mM AlCl3, and a 4-hour preconditioning period. Different kinds of techniques were applied to detect the properties of pre-conditioned ZVI and corrosion products. The 57Fe Mössbauer spectra showed proportions of ZVI, Fe3O4, and FeOOH in pcZVI-AlCl3 were 49.22%, 34.03% and 16.76%, respectively. Both Al3+ and Cl− contributed to iron corrosion, and the formation of Al(OH)3 in the corrosion products remarkably improved its pHpzc (point of zero charge), favoring Cr(VI) adsorption. Continuous-flow experiments showed it maintained an effluent concentration of less than 0.1 mg/L for over 1400 BV, indicating its great potential for Cr(VI) removal in field applications. The ZVI and corrosion products showed a synergistic effect in enhancing electron transfer for Cr(VI) removal. The acidic environment was beneficial to Cr(VI) removal by pcZVI-AlCl3, and it performed effectively in a high hardness condition. The mechanisms underlying Cr(VI) removal by pcZVI-AlCl3 included adsorption, reduction and precipitation. This work provides a new strategy on ZVI pre-corrosion for improving its longevity, and insights into corrosion products regulation for enhancing Cr(VI) removal. © 2024, The Authors. All rights reserved.

关键词： Magnetite

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In situ synthesis of oriented Zn-Mn-Co-telluride on precursor free CuO: An experimental and theoretical study of hybrid electrode paradigm for advanced supercapacitors

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Nano materials Science 2024年

作者： Ahmad, Muhammad Nawaz, Tehseen Hussain, Iftikhar Chen, Xi Khan, Shahid Ali Eddahani, Yassine Abraham, B. Moses Ali, Shafqat Wang, Ci Zhang, Kaili Department of Mechanical Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel University 3141 Chestnut Street PhiladelphiaPA19104 United States Department of Chemistry The University of Hong Kong Hong Kong Department of Chemical Engineering Indian Institute of Technology Kanpur Kanpur208016 India State Key Laboratory of New Textile Materials and Advanced Processing Technologies National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan430200 China Key Lab of In-fiber Integrated Optics Ministry Education of China Harbin Engineering University Harbin150001 China

The evolution of energy storage technology has seen remarkable progress, with a shift from pure metals to sophisticated, tailor-made active materials. The synthesis of nanostructures with exceptional properties is crucial in the advancement of electrode materials. In this regard, our study highlights the fabrication of a novel, oriented heterostructure comprised of Zn-Mn-Co-telluride grown on a pre-oxidized copper mesh using a hydrothermal method followed by a solvothermal process. This innovative approach leads to the formation of the Zn-Mn-Co-telluride@CuO@Cu heterostructure, which demonstrates the unique oriented morphology. It outperforms both Zn-Mn-Co-telluride@Cu and CuO@Cu by exhibiting lower electrical resistivity, increased redox activity, higher specific capacity, and improved ion diffusion characteristics. The conductivity enhancements of the heterostructure are corroborated by density functional theory (DFT) calculations. When utilized in a hybrid supercapacitor (HSC) alongside activated carbon (AC) electrodes, the Zn-Mn-Co-telluride@CuO@Cu heterostructure-based HSC achieves an energy density of 75.7 Wh kg−1. Such findings underscore the potential of these novel electrode materials to significantly impact the design of next-generation supercapacitor devices. © 2024 Chongqing University

关键词： Electrodes

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Accurate Data-Driven Sliding Mode Parking Control for Autonomous Ground Vehicles with Efficient Trajectory Planning in Dynamic Industrial Scenarios

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SSRN 2023年

作者： Jiang, Liquan Deng, Yuxuan Jiang, Zhihui He, Ruhan Yu, Hao Meng, Jie Xu, Weilin State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430074 China State Key Laboratory of Maritime Technology and Safety Wuhan University of Technology Wuhan430063 China School of Computer Science Yangtze University Jingzhou434022 China School of Computer Science and Artificial Intelligence Wuhan Textile University Wuhan430074 China National Engineering Research Center for Water Transport Safety Wuhan University of Technology Wuhan430063 China

Autonomous Ground Vehicles (AGVs) can transfer or load and unload material in industrial scenarios due to their flexibility and operability, freeing people from tedious and repetitive labour. However, the dynamic scene and the system model uncertainty reduce the parking accuracy of AGVs in industrial scenes, which seriously affects the autonomous operation robustness and accuracy. This paper proposes a data-driven parking control-planning integration solution for AGVs in complex industrial scenes, which combines sliding mode parking control with trajectory planning based on iterative error compensation, allowing AGVs to park accurately and converge to the target parking site quickly. First, a data-driven discrete sliding mode controller is designed to iteratively reduce parking error, which is insensitive to disturbance during erratic iterative error compensation, ensuring the rapid and asymptotic convergence of the parking error in industrial scenarios. Then, to achieve efficient planning with the target parking site constantly being corrected, an improved Bi-RRT based trajectory planning scheme considering operational constraints and node expanding region division is proposed, which provides the trajectory that contributes to parking convergence for the proposed controller promptly. Finally, the efficiency of the proposed method is verified by real-world experiments with self-developed AGV in industrial scenes, and experimental results show that the proposed method achieves accurate parking control with efficient trajectory planning and rapid parking error convergence. © 2023, The Authors. All rights reserved.

关键词： Error compensation

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Cell-Penetrating Peptides Transport Red Phosphorescence Nanoparticles Sensitized by Thermally Activated Delayed Fluorescent Polymer for Time-Resolved Luminescence Imaging

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SSRN 2023年

作者： Luo, Zihan Zhou, Zhuofan Pan, Yiwen Yuan, Huanxiang Hong, Yi Zhu, Zece Xu, Li Department of Pharmacy Hubei University of Chinese Medicine Wuhan430065 China Department of Chemistry College of Chemistry and Materials Engineering Beijing Technology and Business University Beijing100048 China Wuhan Textile University Department of Chemistry and Chemical Engineering State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan4320200 China

Ir complexes have received considerable attention in time-resolved luminescence imaging due to their long luminescence lifetimes. In this study, we devised and synthesized a red phosphorescent nanoparticle comprised of an Ir complex in a straightforward manner, significantly improving its bioimaging efficacy. The PMD-Ir quantum yield was elevated through energy transfer from the thermally activated delayed fluorescent (TADF) polymer PCzDP-20 inside the nanoparticle. Additionally, we successfully self-assembled a cell-penetrating peptide (CPP) F6G6(rR)3R2 (FR-20) into well-dispersed nanoparticles with PMD-Ir and PCzDP-20 in an aqueous solution. The resulting nanoparticle has good water dispersibility and cellular uptake rate, making it more effective for time-resolved luminescence imaging. © 2023, The Authors. All rights reserved.

关键词： Energy transfer

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Recent Advances in Fibrous materials for Hydroelectricity Generation

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Nano-Micro Letters 2025年第2期17卷 109-133页

作者： Can Ge Duo Xu Xiao Feng Xing Yang Zheheng Song Yuhang Song Jingyu Chen Yingcun Liu Chong Gao Yong Du Zhe Sun Weilin Xu Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123People’s Republic of China National Engineering Laboratory for Modern Silk Soochow UniversitySuzhou 215123People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Department of Electrical and Computer Engineering University of MassachusettsAmherstMA 01003USA Department of Materials Imperial College LondonSouth Kensington CampusLondon SW72AZUK College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418People’s Republic of China

Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable *** generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy *** materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first ***,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are ***,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in ***,the potential applications including power supply,energy storage,electrical sensor,and information expression are also ***,some existing challenges are considered and prospects for future development are sincerely proposed.

关键词： Hydroelectricity Fibrous material Streaming potential Ion diffusion

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Growth of AgBr/Ag_(3)PO_(4) Heterojunction on Chitosan Fibers for Degrading Organic Pollutants

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advanced Fiber materials 2020年第5期2卷 246-255页

作者： Si-wei Xiong Yan Yu Pei Wang Man Liu Shao-hua Chen Xian-ze Yin Luo-xin Wang Hua Wang College of Materials Science and Engineering State Key Laboratory of New Textile Materials and Advanced Processing TechnologyWuhan Textile UniversityWuhan 430073People’s Republic of China Sichuan Textile Science Research Institute Chengdu 610072People’s Republic of China

Using Fiber as the based material for photocatalyst particles is favorable for their recovery,thereby avoiding the photocatalyst particles cause secondary pollution to water *** this work,the AgBr and Ag_(3)PO_(4) photocatalyst particles were loaded onto the surface of chitosan fiber(CF)via chelation and in situ anion-exchange *** photocatalytic results illustrated that the AgBr/Ag_(3)PO_(4)/CF composites displayed the best photocatalytic performance when the mass ratio of Ag_(3)PO_(4) and AgBr onto the CF was approximately 1:0.15,their degradation rate can reach 98.1%for the methyl orange(MO)solution,this value far exceeded those of pure CF,AgBr/CF composites,and Ag_(3)PO_(4)/CF ***,the AgBr/Ag_(3)PO_(4)/CF composites also shown excellent durability,after the fifth cycle,they still maintained a decolorization rate of 86.4%for the MO solution,while the Ag_(3)PO_(4)/CF composites maintained a decolorization rate of only 70.7%.Based on these results,we consider that the AgBr/Ag_(3)PO_(4)/CF composites have high practical interest in environmental remediation.

关键词： AgBr Ag_(3)PO_(4) Chitosan fiber Photocatalytic degradation

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Multifunctional Amphibious Superhydrophilic-Oleophobic Cellulose Nanofiber Aerogels for Oil and Water Purification

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SSRN 2023年

作者： Xu, Hao Zhang, Zhong Jiang, Wei Fang, Xinrui Xia, Zhigang Niu, Haitao Zhou, Hua Laboratory for Manufacturing Low Carbon and Functionalized Textiles The Universities of Shandong Province State Key Laboratory for Bio-Fibers and Eco-Textiles College of Textiles & Clothing Qingdao University Qingdao266071 China Collaborative Innovation Center for Eco-textiles of Shandong Province The Ministry of Education Collaborative Qingdao University Qingdao266071 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

Aerogels are of a popular choice for oil-water separation and water purification due to their attractive properties, such as lightweight, large surface area, and high porosity. Developing robust aerogels with multifunctional characteristics is highly desirable but remains challenging nowadays. Herein, we develop a facile one-pot condensation strategy for the fabrication of superhydrophilic-oleophobic (SHI-OP) composite aerogels using cellulose nanofibers (CNF), 3-glycidy-loxypropyl trimethoxysilane (GPTMS), polyethyleneimine (PEI) and fluorine-contained compound (FS-60). The resulted aerogels exhibit a directional lamellar structure with interconnected macropores, super-lightweight with high porosity of 98.30% and low density of 0.0256 ***-3. Also, the aerogels are mechanically durable against repeated compression. Meanwhile, the amphibious SHI-OP feature of the composite aerogels in both air and water states enables them to not only absorb trace amount of water from contaminated oils, but also separate oil-water mixtures with separation efficiency of over 99% and high permeation flux of over 9060 L/m2·h. Moreover, the aerogels also show excellent dye adsorption capability and reusability toward anionic dyes with a maximum adsorption capacity of 1245.68 mg/g. Such robust and multifunctional aerogels with special surface wettability provide good opportunity for liquid purification and dye-containing wastewater treatment. © 2023, The Authors. All rights reserved.

关键词： Aerogels

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Enhanced Flexoelectric and Piezoelectric Pairing of Bent Pvdf Membrane with 2d Sns2-Biocl Heterojunction

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SSRN 2024年

作者： Li, Wen-Ming Zhang, Hui Dai, Chen-Min Miao, Jiao-Jiao Zhang, Peng-Fei Fan, Wei Song, Qing-Wen Chen, Pei Xia, Liang-Jun Xu, Wei-Lin Key Laboratory ofFunctionalTextile MaterialandProduct ofMinistry ofEducation School ofTextile Science andEngineering Xi'an Polytechnic University Xi’an710048 China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and Technology Suzhou University of Science and Technology Suzhou215009 China Interdisciplinary Research Center of Biology & Catalysis School of Life Sciences Northwestern PolytechnicalUniversity Xi'An710072 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

In this study, n-type SnS2 nanosheets and p-type BiOCl nanosheets prepared by hydrothermal method are utilized to construct the heterostructure SnS2-BiOCl composite through ultrasonication and grinding procedures. The piezoelectric SnS2-BiOCl heterojunction nanosheets are incorporated into the ferroelectric polyvinylidene fluoride (PVDF) membrane to fabricate the PVDF-SnS2-BiOCl flexoelectric strain sensor. The optimal amount of SnS2-BiOCl heterojunction in the PVDF-SnS2-BiOCl membrane is determined. A thorough analysis is conducted on the impact of bending curvature, frequency of bending, size and thickness of the membrane, water flapping, underwater bending, resistance to fatigue from repeated bending, and resistance to corrosions from acid and alkali on the membrane's output current and voltage. The experimental and density functional theory (DFT) calculation results indicate that the PVDF-SnS2-BiOCl(2:1)-10% membrane, functioning as a smart strain sensor, has the ability to monitor human joint movements and water fluctuations in different situations. Additionally, it can be used as a coating for polyester and linen fabrics, and can be connected in series or in parallel. The experimental findings align closely with the results obtained from DFT calculations. The outcomes demonstrate that the PVDF-SnS2-BiOCl membrane strain sensor, which is highly flexible, sensitive, and attachable, is well-suited for smart wearable electronic materials. © 2024, The Authors. All rights reserved.

关键词： Heterojunctions

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On the electrochemical CO2 reduction by Bi-based catalysts: single crystals or mixture phases

arXiv

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arXiv 2024年

作者： Zhou, Mengting Liu, Hongxia Yan, Juntao Chen, Qingjun Chen, Rong Liu, Lei School of Chemistry and Environmental Engineering Wuhan Institute of Technology Wuhan430205 China Center for Computational Chemistry School of Chemistry and Chemical Engineering Wuhan Textile University Wuhan430200 China College of Chemistry and Environmental Engineering Wuhan Polytechnic University Wuhan430023 China Key Laboratory of Rare Earths Chinese Academy of Sciences Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341000 China State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University 430200Wuhan China

Metallic bismuth is both non-toxic and cost-effective. Bi-based catalysts have demonstrated the ability to efficiently produce HCOOH through CO2RR while effectively inhibiting the HER. Although many experiments have been reported concerning its performance towards CO2 reduction, the impact its valence states and crystal faces on CO2RR selectivity (e.g. HCOOH versus CO) it still under debate. Here, we performed a comprehensive study via density functional theory, by including three typical valence states of Bi, such as 0 (Bi), +3 (Bi2O3) and +5 (Bi2O5), as well as their often-studied crystal facets. The results show that metallic Bi demonstrates a poor selectivity for HCOOH, but boasts a higher conversion rate for CO2. While Bi2O3 exhibits a good selectivity for HCOOH production, yet it displays a lower conversion rate for CO2. For Bi2O5, all studied surfaces show high energy barriers in both cases of HCOOH and CO production, and lower energy barriers for HER reactions, indicating that Bi at +5 valence state is not the good choice for 2e transfer reactions. Subsequently, we further examined the effects of oxygen contents on the selectivity of HCOOH and the conversion rate for CO2. Interestingly, we found that partial oxidization of Bi benefits both the selectivity and the conversion rate. With these observations, we suggest that a mixture of Bi (0) and Bi2O3 (+3) phases would be a better choice than single crystals for future experiments. © 2024, CC BY.

关键词： Bismuth compounds

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