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A self-cleaning window for high-efficiency photodegradation of indoor formaldehyde

Chinese Chemical Letters 2024年第9期35卷 340-345页

作者： Changzhu Huang Wei Dai Shimao Deng Yixin Tian Xiaolin Liu Jia Lin Hong Chen Department of Physics Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric PowerShanghai University of Electric PowerShanghai 200090China Shenzhen key {1. of Interfacial Science and Engineering of Materials State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution ControlGuangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Eastern Institute for advanced Study Eastern Institute of TechnologyNingbo 315200China

Formaldehyde(HCHO)as an indoor air pollutant released by new furniture and decorative materials is of great *** a self-cleaning device to remove HCHO is an ideal way to improve indoor air *** this study,a self-cleaning window with a multilayered structure constructed from fluorinedoped tin oxide/bismuth tungstate/resorcinol-formaldehyde resin(FTO/Bi_(2)WO_(6)/RF)has been fabricated,which is capable of degrading HCHO in natural indoor *** as-fabricated device could utilize the natural room light and promote the generation and transfer of the photocatalytic carriers in Bi_(2)WO_(6),which subsequently delivers a good catalytic oxygen reduction efficiency in RF to produce hydrogen peroxide(H_(2)O_(2)).The as-synthesized H_(2)O_(2)could further split into hydroxyl radicals(•OH),then oxide the HCHO molecules in the *** present study demonstrates a novel and efficient strategy to fabricate a transparent multifunctional window for self-cleaning indoor gaseous pollutants,the concept is of great importance to be expanded in a broad range of indoor furniture for in-house air pollution control.

关键词： Bismuth tungstate Resorcinol-formaldehyde Photocatalysis Hydrogen peroxide HCHO degradation

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Nonlinear Impact Damage Evolution of Charpy Type and Analysis of Its key Influencing Factors

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 254-264页

作者： Jianfeng Mao Qian Xu Jiadong Yang Chi Cao Dasheng Wang Fengping Zhong Mingya Chen Institute of Process Equipment and Control Engineering Zhejiang University of TechnologyHangzhou 310032China Taizhou key {1. of advanced Manufacturing technology Taizhou InstituteZhejiang University of TechnologyTaizhou 318014China State key {1. of Nuclear power Safety Monitoring technology and Equipment Shenzhen 518172China Zhejiang Academy of Special Equipment Science Hangzhou 310020China Suzhou Nuclear power Research Institute Suzhou 215004China

The current research of Charpy impact mainly focuses on obtaining the ductile brittle transition temperature of materials by *** with experiments,numerical simulation can study many problems with harsh ***,there are still few studies on the influence of geometric factors such as side *** this paper,the geometry of standard Charpy impact test is *** with different widths and side grooves are *** finite element model of Charpy impact was established by ABAQUS *** test results and simulation results to verify each *** effects of sample width,side groove depth and side groove bottom fillet on the impact fracture resistance of the sample were *** results show that the specimen width is positively correlated with the impact toughness of the *** side groove greatly reduces the impact toughness of the material;the toughness of side groove decreases with the increase of depth;the fracture toughness of side groove decreases with the increase of fillet at the bottom of side *** proportion of toughness energy to impact energy of samples was *** results show that the toughness energy accounts for about 70%of the impact energy of the sample,which has little to do with the geometric characteristics of the *** study presents a reliable method for studying Charpy impact *** influence of geometric parameters is obtained,which provides a reference method for the study of impact toughness of high toughness materials.

关键词： Johnson-Cook model Impact toughness Charpy impact

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Electrochemical converting ethanol to hydrogen and acetic acid for large scale green hydrogen production

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Nano Research 2024年第3期17卷 1542-1551页

作者： Yufeng Zhang Wei Zhu Jinjie Fang Zhiyuan Xu Yanrong Xue Jiajing Pei Rui Sui Xingdong Wang Xuejiang Zhang Zhongbin Zhuang State key Lab of Organic-Inorganic Composites and Beijing {1. Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China laboratory of {1. Functional Materials of Nanjing Nanjing Xiaozhuang UniversityNanjing 211171China Beijing key {1. of energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

Electrochemical coupling hydrogen evolution with biomass reforming reaction(named electrochemical hydrogen and chemical cogeneration(EHCC)),which realizes green hydrogen production and chemical upgrading simultaneously,is a promising method to build a carbon-neutral ***,we analyze the EHCC process by considering the market *** ethanol to acetic acid and hydrogen approach is the most feasible for large-scale hydrogen *** develop AuCu nanocatalysts,which can selectively oxidize ethanol to acetic acid(>97%)with high long-term *** isotopic and in-situ infrared experiments reveal that the promoted water dissociation step by alloying contributes to the enhanced activity of the partial oxidation reaction path.A flow-cell electrolyzer equipped with the AuCu anodic catalyst achieves the steady production of hydrogen and acetic acid simultaneously in both high selectivity(>90%),demonstrating the potential scalable application for green hydrogen production with low energy consumption and high profitability.

关键词： selective ethanol electrooxidation gold alloy catalyst electrochemical-coupled hydrogen production market assessment interfacial water activation

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Laser-upgraded coal tar for smart pavements in road and bridge monitoring applications

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Microsystems & Nanoengineering 2024年第2期10卷 231-239页

作者： Jincai Huang Man Zhang Haoyun He Qingang Li Yixin Zhao Qiulin Tan Xining Zang Department of Mechanical Engineering Tsinghua UniversityBeijing100084China State key {1. of Clean and Efficient Turbomachinery power Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing100084China key {1. for advanced Materials Processing technology Ministry of EducationBeijing100084China Science and technology on Electronic Test and Measurement {1. North University of ChinaTaiyuan030051China School of energy and Mining Engineering China University of Mining and Technology(Beijing)Beijing100083China

The implementation of an intelligent road network system requires many sensors for acquiring data from roads,bridges,and vehicles,thereby enabling comprehensive monitoring and regulation of road *** this large number of required sensors,the sensors must be cost-effective,dependable,and environmentally ***,we show a laser upgrading strategy for coal tar,a low-value byproduct of coal distillation,to manufacture flexible strain-gauge sensors with maximum gauge factors of 1..20 and 254.1. for tension and compression ***,we completely designed the supporting processes of sensor placement,data acquisition,processing,wireless communication,and information decoding to demonstrate the application of our sensors in traffic and bridge vibration *** novel strategy of using lasers to upgrade coal tar for use as a sensor not only achieves the goal of turning waste into a resource but also provides an approach to satisfy large-scale application requirements for enabling intelligent road networks.

关键词： gauge bridge smart

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Biphase-to-monophase structure evolution of Na_(0.766+x)Li_(x)Ni_(0.33-x)Mn_(0.5)Fe_(0.1.Ti_(0.07)O_(2) toward ultradurable Na-ion batteries

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Carbon energy 2024年第9期6卷 66-79页

作者： Mengting Liu Zhiwei Cheng Xu Zhu Haojie Dong Tianran Yan Liang Zhang Lu Zheng Hu-Rong Yao Xian-Zuo Wang Lianzheng Yu Bing Xiao Yao Xiao Peng-Fei Wang State key {1. of Electrical Insulation and power Equipment School of Electrical EngineeringCenter of Nanomaterials for Renewable EnergyXi'an Jiaotong UniversityXi'anShaanxiChina Jiangsu key {1. of advanced Negative Carbon Technologies Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhouJiangsuChina Fujian Provincial key {1. of Quantum Manipulation and New energy Materials College of Physics and EnergyFujian Normal UniversityFuzhouFujianChina Wenzhou key {1. of Sodium-Ion Batteries Institute for Carbon NeutralizationWenzhou University Technology InnovationWenzhouZhejiangChina

Layered composite oxide materials with O3/P2 biphasic crystallographic structure typically demonstrate a combination of high capacities of the O3 phase and high operation voltages of the P2 ***,their practical applications are seriously obstructed by difficulties in thermodynamic phase regulation,complicated electrochemical phase transition,and unsatisfactory cycling ***,we propose an efficient structural evolution strategy from biphase to monophase of Na_(0.766+x)Li_(x)Ni_(0.33-x)Mn_(0.5)Fe_(0.1.Ti_(0.07)O_(2) through Li+*** role of Li+substitution not only simplifies the unfavorable phase transition by altering the local coordination of transition metal(TM)cations but also stabilizes the cathode–electrolyte interphase to prevent the degradation of TM cations during battery *** a result,the thermodynamically robust O_(3)-Na_(0.826)Li_(0.06)Ni_(0.27)Mn_(0.5)Fe_(0.1.Ti_(0.07)O_(2) cathode delivers a high capacity of 1.9.4 mAh g^(-1. at 0.1.C and shows prolonged cycling life at high rates,with capacity retention of 81.6%at 5 C over 500 *** work establishes a solid relationship between the thermodynamic structure evolution and electrochemistry of layered cathode materials,contributing to the development of long-life sodium-ion batteries.

关键词： electrochemistry Li+substitution Na-ion batteries O_(3)phase phase transition

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Pressure-induced magnetic phase and structural transition in SmSb2

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Chinese Physics B 2024年第6期33卷 484-489页

作者：李涛王舒阳陈绪亮陈春华房勇杨昭荣 Science Island Branch of Graduate School University of Science and Technology of China Anhui key {1. of Low-energy Quantum Materials and Devices High Magnetic Field LaboratoryHFIPS Chinese Academy of Sciences Jiangsu laboratory of {1. Functional Materials Department of Physics Changshu Institute of Technology Institutes of Physical Science and Information technology Anhui University Collaborative Innovation Center of advanced Microstructures

Motivated by the recent discovery of unconventional superconductivity around a magnetic quantum critical point in pressurized CeSb2,here we present a high-pressure study of an isostructural antiferromagnetic（AFM） SmSb2through electrical transport and synchrotron x-ray diffraction *** PC～2.5 GPa,we found a pressure-induced magnetic phase transition accompanied by a Cmca→P4/nmm structural phase *** the pristine AFM phase below PC,the AFM transition temperature of SmSb2is insensitive to pressure;in the emergent magnetic phase above PC,however,the magnetic critical temperature increases rapidly with increasing *** addition,at ambient pressure,the magnetoresistivity（MR） of SmSb2increases suddenly upon cooling below the AFM transition temperature and presents linear nonsaturating behavior under high field at 2 *** increasing pressure above PC,the MR behavior remains similar to that observed at ambient pressure,both in terms of temperature-and field-dependent *** leads us to argue an AFM-like state for SmSb2above *** the investigated pressure of up to 45.3 GPa and the temperature of down to 1.8 K,we found no signature of superconductivity in SmSb2.

关键词： high pressure antiferromagnet magnetoresistivity structural transition

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Effective Ultra-High-Speed Identification Scheme of Lightning Strikes Suitable for VSC-Based DC Grids

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CSEE Journal of power and {1. Systems 2024年第2期10卷 548-561页

作者： Longlong Chen Xiangyu Pei Xiaoguang Wei Pengzhi Li Guangfu Tang North China Electric power University(NCEPU) Beijing 102206China Changsha University of Science and technology Changsha 410114China State key {1. of advanced power Transmission technology State Grid Smart Grid Research Institute Co.Ltd.Beijing 102209China

To ensure their sound and continuous operation to the greatest extent,VSC-based DC girds have extremely stringent requirements for transmission line relay *** terms of guaranteeing their reliability,accurate identification of lightning strikes on DC transmission lines is one of the urgent key problems to be *** effective ultra-high-speed identification scheme of lightning strikes suitable for the VSC-based DC grid is proposed in this ***,an 1.mode reverse voltage traveling wave(RVTW)is constructed applying the pole-mode transformation ***,fault traveling wave propagation characteristics along the DC transmission line are analyzed in depth utilizing Peterson's ***,differences of time-frequency electromagnetic transient characteristics of 1.mode RVTWs between disturbances and faults caused by lightning strikes are distinguished in detail by means of the classical wavelet transformation multi-resolution analysis ***,extensive simulations are carried out to evaluate the performance of the proposed identification scheme,and by which its excellent rapidity,reliability and robustness are *** Terms-Lightning-strike identification,Multi-resolution analysis,Relay protection,Traveling-wave protection,VsC-based DC grid,Wavelet transformation.

关键词： Lightning-strike identification Multi-resolution analysis Relay protection Traveling-wave protection VsC-based DC grid Wavelet transformation

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Polarized imaging dynamic light scattering for simultaneous measurement of nanoparticle size and morphology

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Particuology 2024年第2期85卷 213-223页

作者： Bingyao Wang Tianyi Cai Xiaoshu Cai Wu Zhou Zeqi Liu Schoolof energy and {1. Engineering University of Shanghai for Science and TechnologyShanghai200093China Shanghai key {1. of Multiphase Flow and Heat Transfer in power Engineering Shanghai200093China Jiaxing MeaParTech Instrument technology Co. LtdZhejiang314000China

The performance of nanoparticles is often affected by particle size and ***,electron microscopy or atomic force microscopy is typically utilized to determine the size and morphology of ***,there are issues such as difficult sample preparation,long processing times,and challenges in quantitative ***,it is of great significance to develop a fast,accu-rate,and statistical method to measure the size and morphology of *** this study,a new method,called polarized imaging dynamic light scattering(PIDLS),is *** nanoparticles are irradiated with a vertical linearly polarized laser beam,and a polarization camera collected the dynamic light scattering images of particles at four different polarization directions(0°,45°,90°,and 1.5°)at a scattering angle of 90°.The average particle size and distribution are obtained using the imaging dy-namic light scattering method at 0°polarization direction,and the morphology of the particles is ob-tained based on the depolarization patterns of the scattered *** optical sphericityΦis defined based on the degree of linear polarization(DoLP).It is also implemented for the quantitative evaluation of the sphericity of the nanoparticles,including spherical,octahedral,nanoplate,nanorod,and linear *** with the Poincarésphere parameterψ,the morphology of the nanoparticles can be roughly *** addition,PIDLS enables the measurement of particle size and morphology distributions simultaneously for evaluating the uniformity of *** effectiveness of PIDLS is verified by the measurement of five kinds of industrial titanium dioxide as well.

关键词： Imaging dynamic light scattering Polarized light scattering Non-spherical nanoparticles Morphology Online measurement

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3D Foam-Based MXene Architectures:Structural and Electrolytic Engineering for advanced Potassium-Ion Storage

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energy & Environmental Materials 2024年第4期7卷 64-73页

作者： Peng Zhang Yanmeng Peng Qizhen Zhu Razium Ali Soomro Ning Sun Bin Xu State key {1. of Organic-Inorganic Composites Beijing Key Laboratory of Electrochemical Process and Technology for Materials Beijing University of Chemical Technology Beijing advanced Innovation Centre for Soft Matter Science and Engineering Beijing University of Chemical Technology

MXenes are emerging rapidly as promising electrode materials for energy storage due to their high electronic conductivity and rich surface chemistry,but their potassium storage performance is unsatisfactory because of... 详细信息

关键词： 3D foam-like scaffold electrolyte chemistry electrostatic neutralization MXene potassium-ion batteries

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Controlled flight of a self-powered micro blimp driven by insect-sized flapping-wing thrusters

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Chinese Journal of Aeronautics 2024年第6期37卷 127-136页

作者： Xian YU Zhiwei LIU Jiaming LENG Mingjing QI Xiaojun YAN School of energy and {1. Engineering Beihang UniversityBeijing 100191China Collaborative Innovation Center of advanced Aero-Engine Beijing 100191China National key {1. of Science and technology on Aero-Engine Aero-thermodynamics Beihang UniversityBeijng 100191China Beijing key {1. of Aero-Engine Structure and Strength Beihang UniversityBeijing 100191China

Micro aerial platforms face significant challenges in achieving long controlled endurance as most of the energy is consumed to overcome the weight of the *** this study,we present a controllable micro blimp that addresses this issue through the use of a helium-filled *** micro blimp has a long axis of 23 cm and is propelled by four insect-sized flapping-wing thrusters,each weighing 80 mg and with a wingspan of 3.5 *** distributed thrusters enable controlled motions and provide the micro blimp with an advantage in flight endurance compared to multirotors or flapping-wing micro aerial vehicles at the same size *** enhance the performance of the controlled flight,we propose a wireless control module that enables manipulation from a distance of up to 1.0 ***,a smartphone application is developed to send instructions to the circuit board,allowing the blimp to turn left and right,ascend and descend,and achieve a combination of these movements *** findings demonstrate that this micro blimp is one of the smallest controlled self-{1.ed micro blimps to date.

关键词： Microairvehicle Aircraft control Self-powered micro blimp Flapping-wing thruster Wireless flight

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