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SSRN 2023年

作者： Huang, Shengnan Chen, Fengxi Zhu, Deyu Li, Jun Liu, Yunling Chen, Rong State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University Hubei Wuhan430200 China School of Chemistry and Environmental Engineering Wuhan Institute of Technology Donghu New & High Technology Development Zone Hubei Wuhan430205 China Henan Institute of Advanced Technology Zhengzhou University Zhengzhou450002 China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University Jilin130012 China

Chlorophenols (CPs) are universal and toxic pollutants in nature, as they have been widely detected in surface water, groundwater, sediment, ambient air, soil, and the human body. In this work, novel FeOOH@BiO2-x binary heterostructure composites with UV-Vis-NIR full-spectrum response were successfully constructed by anchoring highly dispersed amorphous FeOOH on BiO2-x nanosheets. A series characterization indicated the binary components were successfully obtained. The FeOOH@BiO2-x photocatalysts exhibited highly enhanced photocatalytic activity for the degradation of chlorophenols under UV-Vis-NIR full-spectrum irradiation. The amorphous FeOOH could effectively broaden the light response range, modulate the energy band structure and promote the separation and transfer of photogenerated electron-holes pairs, thus boosting the activation of molecular oxygen to generate •O2-. Furthermore, FeOOH@BiO2-x maintained excellent photocatalytic performance upon real solar light of varied irradiance for consecutive 7 days, indicative of great potential towards phenolic pollutants degradation in water. The redox couples of Fe3+/Fe2+ and Bi(3+x)+/Bi3+ also accelerate the efficient generation of reactive oxygen species over FeOOH@BiO2-x with improved durability. This work not only contributes to the design of full-spectrum responsive photocatalysts, but also provides a rational strategy for molecular oxygen activation towards the elimination of emerging contaminants. © 2023, The Authors. All rights reserved.

关键词： Bismuth compounds

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Tunable vortex radiation source driven by free electrons

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Optics Letters 2025年第10期50卷 3333-3336页

作者： Li, Sirui Li, Tianyi Sun, Jingbo Wen, Yongzheng Zhou, Ji State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China State Key Laboratory of Nuclear Physics and Technology Institute of Heavy Ion Physics School of Physics Peking University Beijing100871 China

In this Letter, we propose a scheme to generate tunable vortex radiation through the interaction of free electrons with a dual-layer metasurface. The metasurface combines a field-enhancement layer with a phase-modulation layer to produce enhanced Smith–Purcell radiation (SPR) while enabling gradient phase control. This configuration efficiently converts the free-electron evanescent field into a coherent vortex beam. Simulation results indicate that the proposed structure generates coherent radiation with approximately 4.5 times the intensity of conventional vortex radiation under identical electron-beam conditions. The frequency and direction of the vortex radiation can be tuned by varying the electron velocity. Moreover, the structure enables coherent vortex radiation generation with a small number of electrons, including low-velocity electrons, without requiring strong focusing magnetic fields or periodic electron bunching. This work establishes an innovative approach for developing compact, efficient, and tunable vortex radiation sources based on free electrons. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Particle beam bunching

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Enhanced Flexoelectric and Piezoelectric Pairing of Bent Polyvinylidene Fluoride (Pvdf) Membrane with Two-Dimensional (2d) Stannic Sulfide-Bismuth Oxychloride (Sns2-Biocl) Heterojunction

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SSRN 2024年

作者： Li, Wen-Ming Zhang, Hui Dai, Chen-Min Miao, Jiao-Jiao Fan, Wei Song, Qing-Wen Xia, Liang-Jun Xu, Wei-Lin Key Laboratory of Functional Textile Material and Product of Ministry of Education School of Textile Science and Engineering 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 Polytechnical University Xi’an710072 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

In this study, n-type stannic sulfide (SnS2) nanosheets and p-type bismuth oxychloride (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-based SnS2-BiOCl (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, the 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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Local structural origin of relaxor antiferroelectric behavior in NaNbO3-based ceramics

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Chemical Engineering Journal 2025年 514卷

作者： Meng, Xiangyu Yuan, Liran Li, Dongxu Wang, Pengbin Guo, Qinghu Gan, Xiaoyan Yao, Zhonghua Liu, Hanxing Wu, Jinsong Zhang, Shujun Hao, Hua State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China Nanostructure Research Center Wuhan University of Technology Wuhan430070 China Institute for Superconducting and Electronic Materials Faculty of Engineering and Information Sciences University of Wollongong WollongongNSW2500 Australia

Relaxor-antiferroelectrics (relaxor-AFEs), known for their double polarization–electric field (P-E) hysteresis loops and relaxor characteristics, exhibit outstanding energy storage performance compared to other dielectric materials. However, the origins of their antiferroelectric-like behavior and relaxor features remain unclear due to their complex local structure. In this study, we designed relaxor-AFEs with a high degree of relaxor component and stable antiferroelectric behavior. The recoverable energy density (Wrec) of up to 4.6J/cm3 and energy efficiency of ∼ 79 % were achieved in a 0.76NaNbO3-0.16Na0.5Bi0.5TiO3-0.08CaTiO3 ceramic, demonstrating excellent thermal and frequency stability. The multiphase local polarization configuration was confirmed by atomic-resolution annular dark-field scanning transmission electron microscopy (ADF STEM). Additionally, integrated differential phase contrast (iDPC) images revealed an enhanced antiferrodistortion (AFD) induced by incorporating component with low tolerance factor, contributing to stable antiferroelectric behavior. The relationship between chemical heterogeneity, polarization configuration and energy storage performance was systematically established. This work provides insights into the structure origin and underlying mechanisms for relaxor-AFE performance, with potential implications to guide the development of advanced energy-storage dielectric materials. © 2025 Elsevier B.V.

关键词： Antiferroelectric materials

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Composite Polymer Electrolyte Membranes based on Nafion and Modified PVDF Electrospun Nanofiber Mats

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Journal of Wuhan University of technology(materials Science) 2020年第4期35卷 677-681页

作者： HE Yining WANG Di LI Qiong HUANG Leping BAO Haifeng School of Materials Science and Engineering Wuhan Textile UniversityWuhan 430200China High-Tech Organic Fibers Key Laboratory of Sichuan Province Chengdu 610072China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

We fabricated the nanofiber composite membranes by impregnating Nafion into the modified polyvinylidene fluoride(PVDF) electrospinning nanofiber mat for proton exchange membrane fuel cells *** hydrophobic PVDF nanofibers mat became to the hydrophilic state by alkali treatment for the full embedding of Nafion into the PVDF *** fabricated composite membranes exhibit significantly enhanced thermal stabilities,swelling resistance,and observably improved mechanical property compared to the pristine Nafion *** the content of PVDF nanofiber mat is 15.1wt% in the membrane,the proton conductivity of the nanofiber composite membrane is nearly equal to that of pristine Nafion membrane with the same *** experimental results show that the prepared composite membrane can be used as a promising polyelectrolyte membrane for fuel cell applications.

关键词： proton exchange membrane hydrophilic treatment PVDF electrospinning

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Bilayer Compounded Polytetrafluoroethylene Membrane for Enhanced Oil-Water Emulsion Separation

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Chinese Journal of Polymer Science 2024年第6期42卷 838-850页

作者： Yu-Liang Yang Tai-Ran Zhang Yan-Ting Han Shao-Yun Guo Qin-Gong Rong Jia-Bin Shen State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversitySichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing TechnologyChengdu610065China West China Hospital/West China School of Nursing Sichuan UniversityChengdu610041China Shandong Senrong New Materials Co. Ltd.Zibo256401China

In order to achieve efficient and durable oil-water emulsion separation,the membranes possessing high separation efficiency and mechanical strength attract extensive attention and are in great *** present study,a kind of polytetrafluoroethylene(PTFE)-based bilayer membrane was fabricated by electrospinning fibrous PTFE(fPTFE)on an expanded PTFE(ePTFE)*** morphological observation revealed that the fibrous structure of the fPTFE layer could be tailored by controlling the formulation of spinning *** addition of appropriate polyoxyethylene(PEO)would make the fibers in the fPTFE layer finer and more *** a result,the compounded membrane exhibited a small pore size of approximately 1.25µm and a substantial porosity nearing 80%.This led to super-hydrophobicity,characterized by a high water contact angle(WCA)of 149.8°,and facilitated rapid oil *** water-in-oil emulsion separation experiment further confirmed that the compounded membrane not only had a high separation efficiency closing 100%,but such an outstanding separation capacity could be largely retained,either through multiple cycles of use or through strong acid(pH=1),strong alkali(pH=12),or high-temperature(100°C)***,the mechanical behavior of the bilayer membrane was basically contributed by that of each layer in terms of their volume *** significantly,the poor creep resistance of fPTFE layer was suppressed by compounding with ePTFE ***,this study has laid the groundwork for a novel approach to create PTFE-based compounded membranes with exceptional overall characteristics,showing promise for applications in the realm of emulsion separation.

关键词： ePTFE Electrospinning membrane Bilayer compounding Emulsion separation

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Polymersome formation by solvent annealing-induced structural reengineering under 3D soft confinement

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Nano Research 2021年第12期14卷 4644-4649页

作者： Xi Mao Hao Li Jinwoo Kim Shuai Deng Renhua Deng Bumjoon J.Kim Jintao Zhu Key Laboratory of Material Chemistry for Energy Conversion and Storage of Ministry of Education(HUST) and State Key Laboratory of Materials Processing and Die&Mold TechnologySchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan430074China Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon34141Republic of Korea

A solvent annealing-induced structural reengineering approach is exploited to fabricate polymersomes from block copolymers that are hard to form vesicles through the traditional solution self-assembly *** specifically,polystyrene-b-poly(4-vinyl pyridine)(PS-b-P4VP)particles with sphere-within-sphere structure(SS particles)are prepared by three-dimensional(3D)soft-confined assembly through emulsion-solvent evaporation,followed by 3D soft-confined solvent annealing upon the SS particles in aqueous dispersions for structural engineering.A water-miscible solvent(e.g.,THF)is employed for annealing,which results in dramatic transitions of the assemblies,e.g.,from SS particles to *** approach works for PS-b-P4VP in a wide range of block ***,this method enables effective encapsulation/loading of cargoes such as fluorescent dyes and metal nanoparticles,which offers a new route to prepare polymersomes that could be applied for cargo release,diagnostic imaging,and nanoreactor,etc.

关键词： polymersome block copolymer three-dimensional(3D)confinement self-assembly solvent annealing

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Optimal design approach of interpenetrating pre-stressed metal-ceramic composites based on deep learning neural network

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Composite Structures 2025年 368卷

作者： Liu, Kun Lai, Xin Liu, Lisheng Zhang, Jinyong Liu, Yifei Hubei Longzhong Laboratory Wuhan University of Technology Demonstration Zone XiangYang537134 China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China University of Rochester RochesterNY14527 United States

In this work, we proposed a new pre-stressed metal-ceramic interpenetrating structure to improve the apparent tensile strength of ceramic. In addition, an optimization design framework was constructed by integrating machine learning and gradient descent optimization algorithm for the optimization design of ceramic interpenetrating composites. The optimized metal-ceramic interpenetrating structure can achieve a balance of the stress state of the ceramic phase between intensity and distribution by ingeniously control the confinement and topology of the metal phase. More specifically, the surrogate model we constructed through deep neural network (DNN) can efficiently predict the relationship between the structure and its stress state. The final result obtained can achieve excellent pre-stress effect while making the structure lightweight. © 2025 Elsevier Ltd

关键词： Deep neural networks

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Reversible Zn^(2+) Insertion in Tungsten Ion-Activated Titanium Dioxide Nanocrystals for Electrochromic Windows

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Nano-Micro Letters 2021年第12期13卷 120-131页

作者： Yi Liang Sheng Cao Qilin Wei Ruosheng Zeng Jialong Zhao Haizeng Li William WYu Bingsuo Zou MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237People’s Republic of China Department of Chemistry and Physics Louisiana State UniversityShreveportLA 71115USA

Zinc-anode-based electrochromic devices(ZECDs) are emerging as the next-generation energy-e cient transparent electronics. We report anatase W-doped TiO_(2) nanocrystals(NCs) as a Zn^(2+) active electrochromic material. It demonstrates that the W doping in TiO_(2) highly reduces the Zn^(2+) intercalation energy,thus triggering the electrochromism. The prototype ZECDs based on W-doped TiO_(2) NCs deliver a high optical modulation(66% at 550 nm),fast spectral response times(9/2.7 s at 550 nm for coloration/bleaching),and good electrochemical stability(8.2% optical modulation loss after 1000 cycles).

关键词： Electrochromism Smart windows TiO_(2) Doping Zn^(2+)-based electrochromic

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Enhanced electroless metallization of aramid fibers via non-destructive π–π surface engineering for EMI shielding

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Composites Science and technology 2025年 269卷

作者： Zhang, Tianyi Guo, Jinglun Liu, Shuaijie Gong, Lang Hao, Xiaoyu Ye, Qian Kang, Jingyu Cao, Le Liu, Xuqing State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal Materials Northwestern Polytechnical University Shaanxi Xi'an710072 China School of Electric and Control Engineering Xi'an University of Science and Technology Xi'an710054 China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Shandong Yantai264006 China

Electromagnetic pollution has become a growing concern with the rapid expansion of 5G and 6G technologies, creating an urgent need for lightweight, flexible materials that can shield against electromagnetic interference (EMI) while also offering high electrical conductivity, strong mechanical properties, and reliable environmental stability. Aramid fiber-reinforced composites, already widely used in aerospace electronics due to their excellent strength and heat resistance, show significant potential for effective EMI shielding. However, because aramid fibers are chemically inert, it is challenging to achieve strong adhesion between EMI coatings and the fiber surface, which limits practical applications. Although chemical etching can create active sites for metal particle attachment, it often compromises the fibers’ intrinsic mechanical properties. To address this issue, a non-destructive π–π modification method was introduced. This process adds active sites to the otherwise inert fiber surface without damaging the fibers, thereby enabling a uniform and well-controlled electroless metal coating. Composites prepared using this approach display exceptional EMI shielding performance, exceeding 90 dB. Furthermore, computer simulations were conducted to evaluate the feasibility of applying these modified aramid fiber preforms in larger composite structures. The simulation outcomes are consistent with experimental findings, indicating that the dual-metal Cu/Ni@AF composite delivers outstanding EMI shielding performance. Overall, this method offers a new way to safely modify aramid fibers and paves the way for more sustainable, high-performance shielding materials. © 2025

关键词： Aramid fibers

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