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SSRN 2024年

作者： Li, Xiaohui Qiu, Dan Zhou, Qiancheng Yang, Ze Zhou, Xing Wang, Wenping Wei, Chenchen Zou, Ting Yu, Ying Institute of Nanoscience and Nanotechnology College of Physical Science and Technology Central China Normal University Wuhan430079 China State Key Laboratory of Advanced Technology for Materials Synthesis and processing Wuhan University of Technology Wuhan430070 China

Rechargeable aqueous zinc-ion batteries have been plagued by the well-known problem of zinc dendrite formation. This issue mainly arises from the inherent depletion of anions in the vicinity of the zinc anode during deposition process, leading to a strong spatial electric field that influences Zn2+ cations deposition and triggers dendrite growth. Herein, the anti-anionic-depletion strategy is proposed that involves anions anchored in the surface region of zinc anode to mitigate the adverse effects of the spatial electric field and inhibit dendrite growth. By theoretical calculations and experimental verification, layered double hydroxides (LDHs) materials were selected to immobilize SO42- anions and construct a protective coating layer against anion depletion (anti-anionic-depletion layer). Furthermore, the deposition flux of Zn2+ cations was also regulated by in-situ growing LDH nanosheets. Benefiting from these modifications, the in-situ grown ZnAl-LDH modified electrode (Zn@ZnAl) exhibits outstanding stability (5500 cycles at 40 mA cm-2), and shows negligible capacity degradation in both Zn-Mn full cells and zinc hybrid capacitors. © 2024, The Authors. All rights reserved.

关键词： Positive ions

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S-scheme photocatalyst Bi2O3/TiO2 nanofiber with improved photocatalytic performance

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Journal of materials Science & technology 2020年第17期52卷 145-151页

作者： Rongan He Haijuan Liu Huimin Liu Difa Xu Liuyang Zhang Hunan Province Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha 410022China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

In this study,a hierarchical Bi2O3/TiO2 fibrous composite was in-situ fabricated on an electrospun TiO2 nanofiber at ambient *** the Bi2O3/TiO2 composite,S-scheme electron migration occurred between Bi2O3 and *** the photocatalytic degradation of phenol under simulated sunlight,the asprepared Bi2O3/TiO2 nanofibers considerably outperformed Bi2O3 nanoparticles and TiO2 *** improvement is contributed by maintaining and effectively utilizing the useful carriers and consuming the useless holes and electrons,realized by the S-scheme heterojunction and hierarchical *** study also provides an alternative design fashion for photocatalysts.

关键词： Electrospinning Bismuth Fiber In-situ synthesis

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Electrically variable interfaces in polymer nanocomposite dielectrics

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Physical Review B 2024年第18期109卷 184205-184205页

作者： Wen-Zhi Luo Zhong-Hui Shen Yang Shen Long-Qing Chen Ce-Wen Nan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology Wuhan 430070 China School of Materials and Microelectronics Wuhan University of Technology Wuhan 430070 China School of Materials Science and Engineering State Key Lab of New Ceramics and Fine Processing Tsinghua University Beijing 100084 China Department of Materials Science and Engineering The Pennsylvania State University University Park Pennsylvania 16802 United States

Polymer nanocomposites generally exhibit unexpected dielectric/electrical performance far beyond the sum of every component, which is mainly due to the interface effect induced by the differences in structures and properties between the nanofillers and the polymer matrix. However, understanding the capricious interface effect in different polymer nanocomposites remains a major challenge. Here, we perform density functional theory calculations to investigate the atomic/molecular configurations and local charge behaviors of heterogeneous interfaces between the fillers of perovskites, oxides, two-dimensional materials, and polar/nonpolar polymers. Our findings demonstrate that atomic reconfiguration takes place during the formation of the inorganic/organic interface in order to minimize the overall energy of the system. Significant charge accumulation occurs at heterogeneous interfaces due to electron redistribution, especially for the examples of HfO2 and negatively charged Ca2Nb3O10. When applying an electric field, local polarization, especially around the interface, will be distorted and enhanced as a result of interfacial interaction. Even for the nonpolar polymer with linear dielectric oxides such as TiO2, induced dipole moments also appear near the interface, leading to the improvement of overall polarizability. The outcomes of our study verify that the variable electrical behaviors at the interfaces are highly dependent on the feature of every component constituting the inorganic/organic interface, which offers valuable insights for optimizing the experimental design of heterogeneous interfaces in polymer nanocomposites.

关键词： Electric polarization Solid-solid interfaces Density functional calculations

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Polyoxometalated metal-organic framework superstructure for stable water oxidation

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Science (New York, N.Y.) 2025年第6745期388卷 430-436页

作者： Yue, Kaihang Lu, Ruihu Gao, Mingbin Song, Fei Dai, Yao Xia, Chenfeng Mei, Bingbao Dong, Hongliang Qi, Ruijuan Zhang, Daliang Zhang, Jiangwei Wang, Ziyun Huang, Fuqiang Xia, Bao Yu Yan, Ya State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai China School of Chemistry and Chemical Engineering State Key Laboratory of Materials Processing and Die & Mould Technology Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology (HUST) Wuhan China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing China School of Chemical Sciences University of Auckland Auckland New Zealand National Engineering Laboratory for Methanol to Olefins Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai Synchrotron Radiation Facility Shanghai China Center for High Pressure Science and Technology Advanced Research Shanghai China Key Laboratory of Polar Materials and Devices (MOE) Department of Electronics East China Normal University Shanghai China Multiscale Porous Materials Center Institute of Advanced Interdisciplinary Studies and School of Chemistry and Chemical Engineering Chongqing University Chongqing China College of Energy Material and Chemistry Inner Mongolia Key Laboratory of Low Carbon Catalysis Inner Mongolia University Hohhot China State Key Lab of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai China Center for Next-Generation Energy Materials and School of Chemical Engineering Sungkyunkwan University (SKKU) Seobu-ro Jangan-guGyeonggi-do Suwon South Korea

Stable, nonprecious catalysts are vital for large-scale alkaline water electrolysis. Here, we report a grafted superstructure, MOF@POM, formed by self-assembling a metal-organic framework (MOF) with polyoxometalate (POM). In situ electrochemical transformation converts MOF into active metal (oxy)hydroxides to produce a catalyst with a low overpotential of 178 millivolts at 10 milliamperes per square centimeter in alkaline electrolyte. An anion exchange membrane water electrolyzer incorporating this catalyst achieves 3 amperes per square centimeter at 1.78 volts at 80°C and stable operation at 2 amperes per square centimeter for 5140 hours at room temperature. In situ electrochemical spectroscopy and theoretical studies reveal that the synergistic interactions between metal atoms create a fast electron-transfer channel from catalytic iron and cobalt sites, nickel, and tungsten in the polyoxometalate to the electrode, stabilizing the metal sites and preventing dissolution.

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用于紫外线成像和无线报警的水凝胶基可伸缩、高稳定性和高性能的光电传感器

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Science China materials 2024年第6期67卷 1926-1937页

作者：洪杰钊姚帝杰王浩丁琼玲罗艺冰于家豪张鹤曾令兴杨柏儒王冰陶凯吴进 State Key Laboratory of Optoelectronic Materials and Technologies and Guangdong Province Key Laboratory of Display Material and Technology School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute of Northwestern Polytechnical University in Shenzhen Northwestern Polytechnical UniversityShenzhen 518063China State Key Laboratory of Transducer Technology Shanghai 200050China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing National Engineering Research Center of Novel Equipment for Polymer ProcessingKey Laboratory of Polymer Processing Engineering(SCUT)Ministry of EducationSouth China University of TechnologyGuangzhou 510641China Engineering Research Center of Polymer Green Recycling of Ministry of Education College of Environment and ResourcesFujian Normal UniversityFuzhou 350007China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China

柔性可穿戴的紫外线探测器在个体紫外线暴露监测、智能仿生眼和军事领域受到广泛关注.然而,传统不可拉伸的材料和器件结构设计限制了设备在可动态变形的人体皮肤和非平面表面上的精确监测应用和稳定附着.在本研究中,我们提出了基于氧化... 详细信息

柔性可穿戴的紫外线探测器在个体紫外线暴露监测、智能仿生眼和军事领域受到广泛关注.然而,传统不可拉伸的材料和器件结构设计限制了设备在可动态变形的人体皮肤和非平面表面上的精确监测应用和稳定附着.在本研究中,我们提出了基于氧化铜/碳-水凝胶-氧化锌/碳的新型应变隔离异质结构的本征可拉伸(拉伸应变或弯曲高达150%)紫外线探测器,该探测器具有高灵敏度(开/关比为2100%)、高稳定性(大于4000次循环),以及快速响应和恢复时间(分别为1.5和4 s).值得注意的是,该探测器通过水凝胶桥在氧化铜/碳和氧化锌/碳电极之间引入的p-n结能带结构,以及离子导电水凝胶中I^(-)/I_(3)^(-)的电化学反应机制,显著提高了其载流子效率和紫外线响应强度.本文通过集成传感器与所设计的电路板,进一步开发了一种无线紫外线报警系统,用于紫外线强度超标警报.此外,本文还设计了一种光电传感器阵列,并将其用作视网膜假体,以实现对环境紫外线强度的实时监测和成像.本文基于水凝胶基异质结构为开发可穿戴、可拉伸的光电紫外线传感器单元和成像阵列提供了一种新的可行方法.

关键词： flexible hydrogel sensors stretchable UV sensors UV imaging array optoelectronic sensors wireless alarm

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Enhanced photocatalytic activity and mechanism of CeO_(2) hollow spheres for tetracycline degradation

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Rare Metals 2021年第9期40卷 2369-2380页

作者： Dan Wang Fang-Xin Yin Bei Cheng Yang Xia Jia-Guo Yu Wing-Kei Ho State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Department of Science and Environmental Studies The Education University of Hong KongTai Po 999077Hong KongChina State Key Laboratory of Marine Pollution City University of Hong KongKowloon 999077Hong KongChina

Recently, researchers have focused on designing and fabricating highly efficient catalysts for photocatalytic organic pollutant removal. Herein, CeO_(2) hollow spheres were prepared through a simple template method followed by calcination at different temperatures for the tetracycline(TC) degradation under simulated solar light illumination. With a calcination temperature ranging from400 to 800 ℃, the as-prepared CeO_(2) hollow structure annealed at 600 ℃(C_(600)) exhibited the best degradation performance with a degradation rate constant of0.066 min-1, which was about six and five times higher than those of the uncalcined sample(C_(0)) and the sample calcined at 800 ℃(C_(800)), respectively. Moreover, sample C_(600)was also superior to the CeO_(2) solid particle photocatalyst. The characterisation results showed that the improved photocatalytic performance was mainly ascribed to the synergistic effect of large specific surface areas, high crystallisation and excellent light scattering ability. Furthermore, the results of active species trapping experiments demonstrated that the superoxide anion(·O_(2)^(-)) radical and hole(h^(+)) played dominant roles in TC degradation. Subsequently, the possible TC degradation pathways and photocatalytic mechanism of CeO_(2) hollow spheres were proposed on the basis of high-performance liquid chromatography–mass spectrometry analysis, main active species and band edge positions of CeO_(2). The results of this study provide a basis for designing and exploring hollow structure catalysts for energy conversion and environmental remediation.

关键词： CeO_(2)hollow spheres Photocatalytic degradation Tetracycline Mechanism Reaction pathway

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Magnetic Ordering Boost Excellent Thermoelectric Performance of Flexible Films

SSRN

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SSRN 2023年

作者： Ke, Shaoqiu Nie, Xiaolei Ai, Xiaoling Li, Xiangyu Xu, Wenjie Fu, Kai Chen, Tiantian Liu, Chengshan Zhu, Wanting Wei, Ping Zhao, Wenyu Zhang, Qingjie State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Nanostructure Research Center Wuhan University of Technology Wuhan430070 China

The poor electrical transport performance of flexible thermoelectric (TE) films is a major bottleneck for the development of in-plane heat dissipation technology based on Peltier effect. Herein, ordered Fe nanoparticles (Fe-NPs) and in-situ Fe3O4 nanoparticles (Fe3O4-NPs) as magnetic functional elements (MFEs) were embedded into Bi0.5Sb1.5Te3 (BST)/epoxy flexible films in order to enhance the TE performance. The remarkable increases in electrical conductivity of BST/MFEs/BST/epoxy flexible films have been confirmed to originate from the carrier mobility increases. The retention of large Seebeck coefficient is attributed to the negative magnetoresistance (MR-) induced by spin-dependent scattering and weak localization effect from MFEs. As a result, the maximum power factor of BST/MFEs/BST/epoxy flexible films increased by 45%, and the maximum cooling temperature difference enhanced by 1.6 times. This work reveals that the ordered MFEs can significantly boost the electro-thermal conversion performance of flexible TE films and the magnetoresistance theory can reveal the scattering mechanism of charge carriers in thermo-electromagnetic flexible films. © 2023, The Authors. All rights reserved.

关键词： Magnetoresistance

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Microstructuring Conductive Electrospun Mats for Enhanced Electro‑active Biofilm Growth and High‑Performance Bioelectrocatalysis

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advanced Fiber materials 2023年第5期5卷 1699-1711页

作者： Min Li Hao Lu Jiadong Hu Xuemei Xiang Yanling Zheng Wenhu Gao Wei Sun Wei Wang Zhisong Lu Yan Qiao Institute for Clean Energy and Advanced Materials School of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China Sino‑Singapore Joint Laboratory of Materials and Technologies for Proactive Health Monitoring School of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China Experimental Center for Virtual Simulation of Sports and Health Southwest UniversityChongqing 400715People’s Republic of China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University TechnologyWuhan 430070People’s Republic of China Hubei Longzhong Lab Xiangyang 441000People’s Republic of China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158People’s Republic of China Singapore Institute of Manufacturing Technology Singapore 138669Singapore

Electrospun materials have attracted considerable attention in microbial fuel cells(MFC)owing to their porous structures,which facilitate the growth of electro-active biofilms(EABs).However,the impact of fiber diameter-controlled porous architectures on EAB growth and MFC performance has not been extensively ***,a highly conductive polypyrrole-modified electrospun polyacrylonitrile(PAN)mat was prepared as an electrode material for Shewanella putrefaciens CN32-based *** dominant pore size of the corresponding mat increases from 1 to around 20μm as the fiber diameter increases from 720 to 3770 *** variation affects the adhesion and growth behaviors of electrochemically active bacteria on the mat-based *** electrodes with poresranging from 2 to 10μm allow bacterial penetration into the interior,leading to significant biofilm loading and effective ***,the tight lamination of the electrospun fibers restricts bacterial growth in the deep interior *** developed a friction-induced triboelectric expanding approach to rendering the mats with layered structures to overcome this *** inter-layer spaces of the expanded conductive mat can facilitate bacterial loading from both sides of each layer and serve as channels to accelerate the catalysis of organic ***,the expanded conductive mat with appropriate pore sizes delivers superior bioelectrocatalytic performance in MFCs and dye *** on the findings,a mechanism for the porous structure-controlled EAB formation and bioelectrocatalytic performance was *** work may provide helpful guidance and insights for designing microfiber-based electrodes for microbial fuel cells.

关键词： Electrospun mat Porous structure Bioelectrocatalysis Microbial fuel cells Polypyrrole

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Simultaneous optimization of lattice and spin configurations in atomic scale simulation of magnetic materials

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Physical Review B 2025年第13期111卷 134412-134412页

作者： Zhengtao Huang Teng Yang Hanxing Liu Ben Xu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Smart Materials and Device Integration School of Material Science and Engineering Wuhan University of Technology Wuhan 430070 People's Republic of China Graduate School of China Academy of Engineering Physics Beijing 100088 People's Republic of China School of Materials Science and Engineering Tsinghua University Beijing 100084 People's Republic of China

Large scale atomistic simulations involving spin-lattice coupling are at the forefront of research in condensed matter physics and materials science. A key challenge lies in determining the ground state configurations of spins and lattices given this strong coupling, complicated by their evolution adherence to distinct governing equations. Unlike first-principles calculations, where the magnetic configuration is naturally determined by minimizing the electronic energy, no existing algorithm can simultaneously optimize both lattice and spin degrees of freedom at the atomic scale. This paper introduces a synergistic optimization framework for lattice and spin optimization in magnetic materials, overcoming the conventional separation approach. Employing a “pseudoatomic” method, the simultaneous optimization of atomic and spin configurations enhances accuracy and speed, enabling both atomic scale precision and large scale calculations. Applied to face-centered-cubic iron and BiFeO3, this approach demonstrates effective convergence, offering a robust tool for complex spin-lattice coupling problems, which paves a path for addressing high-dimensional optimization problems.

关键词： Atoms

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Carbon nanotubes modified MXene film as a high-performance electrode for supercapacitor

Carbon nanotubes modified MXene film as a high-performance e...

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2022 International Conference on Optoelectronic Information and Functional materials, OIFM 2022

作者： Wang, Yesheng Kong, Dongqing Cui, Yongpeng Xing, Wei State Key Laboratory of Heavy Oil Processing School of Material Science and Engineering China University of Petroleum Qingdao266580 China Weifang Key Lab of Advanced Light Materials Manufacturing and Forming Weifang University of Science and Technology Weifang262700 China

ISBN: (数字)9781510655126

ISBN: (纸本)9781510655119

As a new family of 2D material, MXene has shown a huge potential in the application of supercapacitor because of their superior conductivity, abundant active sites and the stable layered structure. However, the electrochemical performance of MXene-based electrodes is limited by the stacking of the nanosheets. Herein, the flexible carbon nanotube (CNT) modified Ti3C2 (CNT@Ti3C2-300) film was obtained via facile filtration of the MXene and CNT suspension mixture followed by annealing. The CNT could effectively pillar the interlayer space of the nanosheets to avoid the layeraggregation and create a cross-linked conductive network in the film. The hybrid film exhibits high capacitance of 366.7 F g-1 at a current density 1 A g-1, excellent rate performance up to 75.1% at 20 A g-1 and long cycling life (98.7 % capacitance retention after 8000 cycles at 20 A g-1). The above results indicate its huge potential application as flexible supercapacitors electrode. © 2022 SPIE.

关键词： Carbon nanotubes

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