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Single-atomic tungsten-doped Co_(3)O_(4) nanosheets for enhanced electrochemical kinetics in lithium–sulfur batteries

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Carbon Energy 2023年第8期5卷 31-41页

作者： Sangni Wang Riming Hu Ding Yuan Lei Zhang Chao Wu Tianyi Ma Wei Yan Rui Wang Liang Liu Xuchuan Jiang Hua Kun Liu Shi Xue Dou Yuhai Dou Jiantie Xu National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangdong Provincial Key Laboratory of Atmospheric EnvironmentPollution Control School of Environment and EnergySouth China University of TechnologyGuangzhouChina Shandong Institute of Advanced Technology JinanChina School of Materials Science and Engineering Institute for Smart Materials&EngineeringUniversity of JinanJinanChina Institute of Energy Materials Science University of Shanghai for Science and TechnologyShanghaiChina Institute for Superconducting and Electronic Materials University of WollongongWollongongAustralia School of Science RMIT UniversityMelbourneVictoriaAustralia State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghaiChina

The practical application of lithium–sulfur batteries(LSBs)is severely hindered by the undesirable shuttling of lithium polysulfides(LiPSs)and sluggish redox kinetics of sulfur ***,a series of ultrathin singleatomic tungsten-doped Co_(3)O_(4)(Wx-Co_(3)O_(4))nanosheets as catalytic additives in the sulfur cathode for LSBs are rationally designed and *** from the enhanced catalytic activity and optimized electronic structure by W doping,the Wx-Co_(3)O_(4) not only reduces the shuttling of LiPSs but also decreases the energy barrier of sulfur redox reactions of sulfur species,leading to accelerated electrode *** a result,LSB cathodes with the use of 5.0 wt%W0.02-Co_(3)O_(4) as the electrocatalyst show the high reversible capacities of 1217.0 and 558.6 mAh g^(-1) at 0.2 and 5.0 C,respectively,and maintain a high reversible capacity of 644.6 mAh g^(-1) at 1.0 C(1.0 C=1675 mA g^(-1))after 500 *** a high sulfur loading of 5.5 mg cm^(-2) and electrolyte–electrode ratio of 8μL_(electrolyte) mg_(sulfur)^(-1),the 5.0 wt%W_(0.02)-Co_(3)O_(4)-based sulfur cathode also retains a high reversible areal capacity of 3.86 mAh cm^(-2) at 0.1 C after 50 cycles with an initial capacity retention of 84.7%.

关键词： catalytic additives lithium-sulfur batteries single-atomic dopant sluggish redox kinetics

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Failure Mode Risk Analysis of DC Charger Based on Cloud Model and TOPSIS

Failure Mode Risk Analysis of DC Charger Based on Cloud Mode...

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Prognostics and System Health Management Conference (PHM-Qingdao)

作者： Li Yuan Tan Wen Yan Su Zichao Yi Yu Wang State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Nanjing China Nanjing University of Aeronautics and Astronautics College of Civil Aviation Nanjing China

This paper overcomes the shortcomings of the traditional Risk assessment method of Risk Priority Number (RPN). The evaluation process is established by combining the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) with the cloud model theory. And applied to solve the DC charger failure mode risk assessment, analysis and determination of DC charger key failure mode and failure mechanism. Firstly, the expert assessment information of DC charger fault mode was converted into a cloud model, and then the risk assessment index and expert weight of risk assessment were calculated. Finally, the TOPSIS method was used to determine the risk priority of the fault mode, and the failure mechanism of the high-priority fault mode was analyzed to determine the failure physical model.

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Unveiling microplastic distribution and interactions in the benthic layer of the Yangtze River Estuary and East China Sea

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Environmental Science and Ecotechnology 2024年第4期20卷 114-122页

作者： Xinyu Ge Feng Xu Bo Li Lili Liu Xiao Lu Lijuan Wang Yunxiao Zhang Jiangpeng Li Jiawei Li Yuanyuan Tang School of Environmental Science and Engineering College of EngineeringSouthern University of Science and TechnologyShenzhen518055China State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process School of Resource and Environmental EngineeringEast China University of Science and TechnologyShanghai200237China School of Marine Science and Technology Zhejiang Ocean UniversityZhoushan316004China

Microplastics(MPs),recognized as an emerging global environmental concern,have been extensively detected worldwide,with specific attention directed towards the Yangtze River Estuary(YRE)and East China Sea(ECS)*** their critical research significance,there remains a knowledge gap concerning the distribution of MPs in the benthic layer within this area,particularly regarding interactions governing their *** we illuminate the distribution of MPs within the benthic layer and unravel the intricate interplay between bottom water and sediment in the YRE and *** find that MPs are notably more abundant in bottom water,ranging from 8 to 175 times higher than in surface *** MPs predominantly consist of polyester fibers,exhibit a size range between 0.5 and 5.0 mm,and display distinct ***-occurrence network analysis and Principal Coordinate Analysis confirm a robust correlation between MPs in bottom water and sediment,signifying the pivotal role of bottom water in mediating the distribution and transportation of MPs within the benthic ***,a positive correlation between MPs in sediment and bottom water turbidity underscores the impact of surface sediment resuspension and upwelling on MPs *** study clarifies the intricate interactions within the benthic layer and highlights the crucial role of bottom water as a mediator in the vertical distribution of MPs,advancing our understanding of the“source-to-sink”transport processes governing MPs within water-sediment systems.

关键词： Microplastics Bottom water Sediment Distribution Correlation analysis

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Dynamic response of ultralight all-metallic sandwich panel with 3D tube cellular core to shallow-buried explosives

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Science China(Technological Sciences) 2021年第7期64卷 1371-1388页

作者： ZHANG DuJiang ZHAO Zhen Yu DU ShaoFeng CHEN WeiJie YANG Fan NI ChangYe YANG ZhiKun LU TianJian State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures(MLMS) Nanjing University of Aeronautics and AstronauticsNanjing210016China State Key Laboratory of Smart Manufacturing for Special Vehicles and Transmission System Baotou014030China State Key Laboratory for Strength and Vibration of Mechanical Structures Xi’an Jiaotong UniversityXi’an710049China

The underbody of a vehicle system, either military or civil, is typically made of a relatively thin metallic plate, thus vulnerable to mine blast attacks. To improve the blast resistance, a multitude of protective structures have been proposed as attachments to the thin plate. In the present study, a novel ultralight all-metallic sandwich panel with three-dimensional(3D) tube cellular cores mounted to the vehicle underbody was envisioned as such a protective system. A metallic substrate(mimicking vehicle bottom)was placed above the proposed sandwich panel to construct a sandwich-substrate combinative structure. A series of sandwich panels having 3D tube cellular cores were fabricated via argon protected welding and laser welding. Mechanical responses of the combinative structure subjected to the denotation of 6 kg TNT explosives shallow-buried in dry sand were experimentally measured. Full numerical simulations with the method of finite elements(FE) were subsequently carried out to explore the physical mechanisms underlying the observed dynamic performance and quantify the effects of key geometrical parameters and connection conditions of the protective system. The performance of the proposed sandwich panel under shallow-buried explosives was also compared with competing sandwich constructions having equal mass. Finally, a preliminary optimal design of the 3D tube cellular core was carried out.

关键词： shallow-buried explosive sand blast test 3D tube cellular core sandwich panel numerical simulation

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Health of plateau soil environment: Corresponding relationship of heavy metals in different land use/cover types (LULCC)

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Science of the Total Environment 2025年 973卷 179162页

作者： Fu, Zhenghui Liu, Yong Jiang, Xia Guo, Huaicheng Wang, Shuhang Li, Zheng State Key Laboratory of Environmental Criteria and Risk Assessment National Engineering Laboratory for Lake Pollution Control and Ecological Restoration State Environmental Protection Key Laboratory for Lake Pollution Control Chinese Research Academy of Environmental Sciences Beijing100012 China College of Environmental Sciences and Engineering Peking University Beijing100871 China

The study of land use and land cover change (LULCC) in the Qinghai Tibet Plateau is an important part of regional land science and global change science research. Due to their sensitive response to climate change, plateau lakes undergo changes in their surrounding land use types and soil physicochemical properties, which in turn affect soil environmental health. In the context of global climate change, more scholars are focusing on the relationship between climate change and the transformation of land use types, while research on the response relationship between land use types and pollutant accumulation at the end of the entire system is scarce. This study systematically analyzed the bioavailability and migration dynamics of heavy metals in soils of different land use types in the Qinghai Tibet Plateau watershed, providing solid data support for ecological protection and high-quality development of the plateau watershed, and offering new research ideas for water environment security in the Qinghai Tibet Plateau under the background of climate change. © 2025

关键词： Lakes

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Influence of kaolinite and montmorillonite on benzo[a]pyrene biodegradation by Paracoccus aminovorans HPD-2 and the underlying interface interaction mechanisms

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Pedosphere 2022年第2期32卷 246-255页

作者： Xinhong GAN Ying TENG Jian XU Ning ZHANG Wenjie REN Ling ZHAO Peter CHRISTIE Yongming LUO Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Nanjing Institute of Environmental ScienceMinistry of Ecology and Environment(MEE)of ChinaNanjing 210042China University of Chinese Academy of Sciences Beijing 100049China

Clay minerals play an important role in biogeochemical ***,kaolinite and montmorillonite,the two most abundant and widespread clay minerals with typical layered structures,were selected to investigate and compare their effects on the biodegradation of benzo[a]pyrene(BaP)by Paracoccus aminovorans HPD-2 and to investigate the underlying interface ***,the BaP degradation efficiency was significantly higher 7 d after montmorillonite addition,reaching 68.9%(P<0.05),when compared with that of the control without addition of clay minerals(CK,61.4%);however,the addition of kaolinite significantly reduced the BaP degradation efficiency to 45.8%.This suggests that kaolinite inhibits BaP degradation by inhibiting the growth of strain HPD-2,or its strong hydrophobicity and readily agglomerates in the degradation system,resulting in a decrease in the bio-accessibility of BaP to strain *** may buffer some unfavorable factors,and cells may be fixed on the surface of montmorillonite colloidal particles across energy ***,the adsorption of BaP on montmorillonite may be weakened after swelling,reducing the effect on the bio-accessibility of BaP,thus promoting the biodegradation of BaP by strain *** experimental results indicate that differential bacterial growth,BaP bio-accessibility,interface interaction,and the buffering effect may explain the differential effects of the different minerals on polycyclic aromatic hydrocarbon *** observations improve our understanding of the mechanisms by which clay minerals,organic pollutants,and degrading bacteria interact during the biodegradation process and provide a theoretical basis for increasing the biodegradation of soil pollutants by native microorganisms under field conditions.

关键词： bio-accessibility cell viability clay mineral degrading bacteria nano-scale secondary ion mass spectrometry polycyclic aromatic hydrocarbon

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Adsorptive removal of PPCPs from aqueous solution using carbon-based composites:A review

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Chinese Chemical Letters 2022年第8期33卷 3585-3593页

作者： Tong Wang Jie He Jian Lu Yi Zhou Zhaohui Wang Yanbo Zhou State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration School of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China

Far-ranging and improper uses of pharmaceuticals and personal care products(PPCPs)over the last few decades have led to severe water contamination that imposes serious effects on human beings and the ecological ***,there is an increasing demand for a highly-efficient and environmentally friendly technology for the removal of PPCPs from aqueous *** technology is an appropriate technology to solve this ***-based composites,ranging from modified activated carbon to functionalized biochar,show great potential for this *** review hence elaborates on the environmental occurrences and risks of PPCPs and summarizes the recent progress in removing PPCPs from water using carbon-based *** pore structure,relatively large specific surface area(SSA),abundant surface functional groups,highly aromatic structures and the extra excellent characteristics of the cooperative materials contribute to their outstanding adsorption ***,the biochar-clay material is cost effective and more efficient compared to traditional activated carbon regarding the adsorption of *** the emerging adsorbents,graphene and carbon nanotubes composites show superior adsorption *** adsorption mechanisms,such as electrostatic interactions,hydrogen bonding,and pore filling,are discussed in details.

关键词： Adsorption Carbon-based composites PPCPs Adsorbent Water treatment

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Research on Chinese Word Segmentation Algorithm based on Dictionary and Statistical Method and Its Application in the field of Power Grid control

Research on Chinese Word Segmentation Algorithm based on Dic...

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作者： Chao Shen Jinxia Dai Mengge Mao Kun Zhao Zhen Yan Kun Huang NARI Group Corporation (State Grid Electric Power Research Institute) State Key Laboratory of Smart Grid Protection and Control

In view of the particularity of Chinese word segmentation in the professional field of power grid regulation,the performance of Chinese word segmentation based on traditional statistical algorithm is frequently limited by the corpus training in the proprietary field,and the insufficient ability of Chinese word segmentation based on dictionary algorithm in identifying new words and disambiguation in the proprietary *** paper proposes a Chinese word segmentation method based on the combination of dictionary and statistical method,and applies it to the application scenario of querying the operation status of power *** method constructs a professional dictionary in the field of power grid regulation by using the Double-Array Tree storage *** using the CRF(Conditional Random Fields)train the text data to generate the model file,and the FMM(Forward Maximum Matching) method is used for Chinese word segmentation combined with the professional dictionary in the field of power grid regulation.A fast and accurate online word segmentation method in the field of power grid regulation is designed and implemented,it performs well in some main performance *** the application scenario of querying the power grid operation status,the Chinese word segmentation results obtained by this method combined with the standard query sentence pattern realize the rapid classification of application scenario query and the accurate execution of operation commands,greatly improve the efficiency and accuracy of querying the power grid operation status,and improve the human-computer interaction experience.

关键词： Chinese word segmentation Dictionary Statistical methods Scenario application of power grid regulation

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A critical review of on-site inorganic arsenic screening methods

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Journal of Environmental Sciences 2023年第3期125卷 453-469页

作者： Yi He Jingyu Liu Yanhua Duan Xiaofei Yuan Lulu Ma Ratan Dhar Yan Zheng Department of Sciences John Jay College and the Graduate CenterThe City University of New YorkNY 10019USA State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Queensland Alliance for Environmental Health Sciences(QAEHS) The University of QueenslandQLD 4102Australia Department of Earth and Physical Sciences York CollegeThe City University of New YorkNY 11451USA

Approximately 94 to 220 million people worldwide are at risk of drinking well water containing arsenic > 10 μg/L, the WHO guideline value. To identify non-compliant domestic wells, assess health risks and reduce exposure, accurate and rapid on-site inorganic arsenic screening methods are desirable because all domestic wells worldwide need to be ***, the principles, advantages and limitations of commonly used colorimetry, electrochemistry, and biosensing methods are critically reviewed, with the performance compared with laboratory-based benchmark methods. Most commercial kits are based on the classic Gutzeit reaction. Despite being semi-quantitative, the more recent and more expensive products display improved and acceptable accuracy and shorter testing time (~10 min). Carried out by trained professionals, electrochemical methods are also feasible for on-site analysis, although miniaturization is desirable yet challenging. Biosensing using whole bacterial cells or bio-engineered materials such as aptamers is promising, if incorporated with function specific nanomaterials and biomaterials. Since arsenic is frequently found as arsenite in reducing groundwater and subject to oxidation during sampling, transportation and storage, on-site separation and sample preservation are feasible but the specific methods should be chosen based on sample matrix and tested before use. To eliminate arsenic exposure among hundreds of millions of mostly rural residents worldwide, we call for concerted efforts in research community and regulatory authority to develop accurate, rapid, and affordable tests for on-site screening and monitoring of arsenic in drinking water. Access to affordable testing will benefit people who are socioeconomically disadvantaged.

关键词： Inorganic arsenic On-site analysis Drinking water Groundwater Field test

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Spatio-temporal Granularity Co-optimization Based Monthly Electricity Consumption Forecasting

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CSEE Journal of Power and Energy Systems 2023年第5期9卷 1980-1984页

作者： Kangping Li Yuqing Wang Ning Zhang Fei Wang Chunyi Huang the College of Smart Energy Shanghai Jiao Tong UniversityShanghai 200240China the Department of Electrical Engineering Tsinghua UniversityBeijing 100084China the Department of Electrical Engineering North China Electric Power UniversityBaoding 071003China the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University) Beijing 102206China the Hebei Key Laboratory of Distributed Energy Storage and Microgrid(North China Electric Power University) Baoding 071003China the Key Laboratory of Control of Power Transmission and Conversion Ministry of Education(Shanghai Jiao Tong University)Shanghai 200240China

Monthly electricity consumption forecasting(ECF)plays an important role in power system operation and electricity market *** popularity of smart meters enables collection of fine-grained load data,which provides an opportunity for improvement of monthly ECF *** this letter,a spatio-temporal granularity co-optimization-based monthly ECF framework is proposed,which aims to find an optimal combination of temporal granularity and spatial clusters to improve monthly ECF *** framework is formulated as a nested bi-layer optimization problem.A grid search method combined with a greedy clustering method is proposed to solve the optimization *** of the proposed method has been verified on a real smart meter dataset.

关键词： Electricity consumption forecasting Greedy clustering Grid searching Spatiotemporal

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