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A Selenium Atom Involved Covalent Organic Framework for Window Ledge Photocatalytic Oxidation of Sulfides

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Chinese Journal of Chemistry 2024年第17期42卷 1960-1966页

作者： fan Yang Xia li {2.-Yan Qu Jing-Lan Kan Yuan Guo Yu-bin Dong College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of ShandongKey Laboratory of Molecular and Nano ProbesMinistry of EducationShandong Normal UniversityJinanShandong250014China school of light Industry and Engineering Qilu University of Technology(Shandong Academy of Sciences)JinanShandong 250353China

Covalent organic frameworks(coFs)driven photocatalytic organic transformations especially photooxidation reactions have become a fertile topic and attracted numerous research *** the charge generation and transport process is the key factor for achieving high catalytic *** one of the most effective strategies,the introduction of"heavy atoms"into the long-range ordered conjugated backbones can effectively facilitate the intersystem crossing(isc)process and hence improve the generation of active oxygens,which is beneficial for the *** this work,we designed and synthesized a benzoselenadiazole based covalent organic framework(COF)material,BSe-COF with heavy atom of selenium(Se),and a benzothiadiazole based BT-COF with isomorphic backbone for comparison.

关键词： Covalent organic framework Benzoselenadiazole Density functional theory Heavy atom Photocatalysis Photooxidation Singletoxygen Window ledge reaction

An Overview on Wavelet Software Packages

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wuhan University Journal of Natural Sciences 2001年第Z1期6卷 593-600页

作者： fan qi\|{2. 1, li hong 2.1. school of mathematics and statistics, wuhan University,{2. 2. school of Electronic Information, wuhan University,{2. school of mathematics and {2. Wuhan University Wuhan China school of Electronic Information Wuhan University Wuhan China

Wavelet analysis provides very powerful problem\|solving tools for analyzing, encoding, compressing, reconstructing, and modeling signals and images. The amount of wavelets\|related software has been constantly multiplying. Many wavelet analysis tools are widely available. This overview represents a significant survey for many currently available packages. It will be of great benefit to engineers and researchers for using the toolkits and developing new software. The beginner to learning wavelets can also get a great help from the review. If you browse around at some of the Internet sites listed in the reference of this paper, you may find more plentiful wavelet resources.

关键词： wavelet transforms image compression matching pursuit lifting MATLAB

High-performance broadband photodetector based on PtSe2.MoS2.heterojunction from visible to near-infrared region

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Science china(Information Sciences) 2024年第3期67卷 263-270页

作者： bin WANG Jian YUAN Mengqi CHE Mingxiu {2.U Yuting ZOU Junru AN fan TAN Yaru SHI Nan ZHANG {2.ujian qi Shaojuan {2. State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Applied Optics Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences school of Physics and Electronic Information Huaibei Normal University

Broadband photodetectors based on narrow bandgap 2. materials have garnered considerable interest for application in the field of optoelectronic devices. However, their large dark current hinders device performance. In this work, a PtSe2.MoS2.eterojunction was fabricated for a broadband photodetector operating within the range of visible to near-infrared. The device exhibited suppressed dark currents with a high rectification ratio of 104. The built-in electric field of the heterojunction promoted carrier separation effectively, and the device achieved excellent photoelectric performance with responsivities of 1.7 × 103,2..52. and 2. mA/W at 635, 785, and 1550 nm wavelengths, respectively. Moreover, the specific detectivities(D*) were 2.2.× 1013Jones(635 nm), 3.55 × 1011Jones(785 nm), and 2.72.× 108Jones(1550 nm). The device demonstrated a rise/fall time of 131/2.1.μs under 1550 nm laser illumination. Visible and near-infrared imaging detection was also demonstrated based on the heterojunction device at room temperature. This work sheds light on the remarkable potential of PtSe2.MoS2.eterojunctions in the domain of high-performance broadband photodetectors.

关键词： photodetector PtSe2.MoS2 heterojunction visible to near infrared high performance

Cobalt-Catalyzed Switchable[4+1]and[4+1+1]Spirocyclization of Aromatic Amides with 2.Diazo-1H-indene-1,3(2.)-dione:Access to Spiro Indene-2.1.-isoindolinones and Spiro Isochroman-3,1'-isoindolinones

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Chinese Journal of Chemistry 2024年第4期42卷 363-369页

作者： bin li Mengmeng Xie Jingyu li Nana Shen Xinying Zhang Xuesen fan State Key Laboratory of Antiviral Drugs Pingyuan LaboratoryKey Laboratory of Green Chemical Media and ReactionsKey Laboratory for Yellow River and Huai River Water Environmental Pollution ControlMinistry of EducationSchool of EnvironmentSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiangHenan453007 China

Herein,we report a condition-controlled divergent synthesis of spiro indene-2.1.-isoindolinones and spiro isochroman-3,1'-isoindolinones through cobalt-catalyzed formal[4+1]and[4+1+1]spirocyclization of aromatic amides with 2.diazo-1H-indene-1,3(2.)-*** the reaction is carried out under air in ethyl acetate,spiro indene-2.1.-isoindolinones are formed through Co(II)-catalyzed C—H/N—H[4+1]*** the reaction is run under O2.in CH3CN,on the other hand,spiro isochroman-3,1'-isoindolinones are generated through Baeyer-Villiger oxidation of the in situ formed spiro indene-2.1.-isoindolinones with O2.as a cheaper and environmental-friendly oxygen *** general,these protocols have advantages such as using non-precious and earth-abundant metal catalyst,no extra additive,high efficiency and regioselectivity.A gram-scale synthesis and the removal of the directing group further highlight its utility.

关键词： Spiro indene-2.1.-isoindolinones Spiro isochroman-3,1'-isoindolinones 3d Transition metals Cobalt-catalyzed C-H Activation Switchable[4+1]and[4+1+1]spirocyclization Aromatic amides 2.Diazo-1H-indene-1,3(2.)-dione

MXene Enhanced 3D Needled Waste Denim Felt for High‑Performance Flexible Supercapacitors

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Nano-Micro Letters 2024年第2期16卷 383-394页

作者： Wei fan qi Wang Kai Rong Yang Shi Wanxi Peng Handong {2. Zhanhu Guo Ben bin Xu Hua Hou Hassan Algadi Shengbo Ge Key Laboratory of Functional Textile Material and Product of the Ministry of Education School of Textile Science and EngineeringInstitute of Flexible electronics and Intelligent TextileXi’an Polytechnic UniversityXi’an 710048People’s Republic of China Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China Henan Province International Collaboration Lab of Forest Resources Utilization School of ForestryHenan Agricultural UniversityZhengzhou 450002People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Electrical Engineering Faculty of EngineeringNajran University11001 NajranSaudi Arabia

MXene,a transition metal carbide/nitride,has been prominent as an ideal electrochemical active material for ***,the low MXene load limits its practical *** environmental concerns and sustainable development become more widely recognized,it is necessary to explore a greener and cleaner technology to recycle textile by-products such as *** present study proposes an effective 3D fabrication method that uses MXene to fabricate waste denim felt into ultralight and flexible supercapacitors through needling and *** 3D structure provided more sites for loading MXene onto Z-directional fiber bundles,resulting in more efficient ion exchange between the electrolyte and ***,the carbonization process removed the specific adverse groups in MXenes,further improving the specific capacitance,energy density,power density and electrical conductivity of *** electrodes achieve a maximum specific capacitance of 1748.5 mF cm-2.and demonstrate remarkable cycling stability maintaining more than 94%after 15,000 galvanostatic charge/discharge ***,the obtained supercapacitors present a maximum specific capacitance of 577.5 mF cm^(-2.,energy density of 80.2.Wh cm^(-2.and power density of 3 mW cm^(-2.,*** resulting supercapacitors can be used to develop smart wearable power devices such as smartwatches,laying the foundation for a novel strategy of utilizing waste cotton in a high-quality manner.

关键词： MXene 3D needled waste denim felt Supercapacitors Carbonization

PURP: A Scalable System for Predicting Short-Term Urban TrafficFlow Based on license Plate Recognition Data

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Big Data Mining and Analytics 2024年第1期7卷 171-187页

作者： Shan Zhang qinkai Jiang Hao li {2. Cao Jing fan school of Computer Science and Technology Zhejiang University of TechnologyHangzhou 310000China

Accurate and efficient urban traffic flow prediction can help drivers identify road traffic conditions in real-time,consequently helping them avoid congestion and accidents to a certain ***,the existing methods for real-time urban traffic flow prediction focus on improving the model prediction accuracy or efficiency while ignoring the training efficiency,which results in a prediction system that lacks the scalability to integrate real-time traffic flow into the training *** conduct accurate and real-time urban traffic flow prediction while considering the latest historical data and avoiding time-consuming online retraining,herein,we propose a scalable system for Predicting short-term URban traffic flow in real-time based on license Plate recognition data(PURP).First,to ensure prediction accuracy,PURP constructs the spatio-temporal contexts of traffic flow prediction from license Plate Recognition(LPR)data as effective ***,to utilize the recent data without retraining the model online,PURP uses the nonparametric method k-Nearest Neighbor(namely KNN)as the prediction framework because the KNN can efficiently identify the top-k most similar spatio-temporal contexts and make predictions based on these contexts without time-consuming model retraining *** experimental results show that PURP retains strong prediction efficiency as the prediction period increases.

关键词： traffic flow prediction k-Nearest Neighbor(KNN) license Plate Recognition(LPR)data spatio-temporalcontext

Bifunctional electrolyte addition for longer life and higher capacity of aqueous zinc-ion hybrid supercapacitors

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Rare Metals 2024年第10期43卷 5060-5069页

作者： fan Zhang Si-qi {2. {2.-Nan Xia Chao Yang Lei {2. Kai-Ming Wang Chen-{2.ang Xu Yuan-Yuan Feng bin Zhao Fei Shen Xiao-Gang Han {2.ng-Yun Zhu school of Electric Power Civil Engineering and ArchitectureShanxi University State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi’an Jiaotong University Department of Science Materials and Engineering National University of Singapore school of Materials Science and Engineering Anhui University

Owing to uncontrolled and uneven electrodeposition and side reactions,Zn metal anodes inevitably suffer from issues such as dendrite growth,hydrogen evolution reactions,and surface *** paper proposes an efficient strategy to address these critical issues for realizing long-life and high-capacity aqueous zinc-ion hybrid supercapacitors （ZHSCs） by incorporating low-concentration (0.05 mol·L-1) redox RbI electrolyte ***,rubidium cations have the ability to influence the negative Zn electrode surface via an electrostatic shielding mechanism,effectively protecting the electrode and minimizing undesired side *** an aqueous solution,iodide anions actively solvate Zn2.ions by stabilizing and modulating the solvation shell surrounding Zn2..Moreover,the presence of iodide ions promotes the uniform deposition of Zn2.species by selective adsorption onto the electrode *** synergistic effect of the electrostatic shielding and halogen ions enables the realization of aqueous symmetric Zn||Zn cells with a substantial cycle life of more than 2.00 h Additionally,when applied to commercial activated carbon（AC）,the proposed strategy facilitates the development of aqueous ZHSCs,exhibiting high specific capacitances(148.8 F·g-1at 4 A·g-1) and ultra-long cycling stability.

关键词： Aqueous zinc-ion hybrid supercapacitor Rubidium iodide Synergistic effects of anions and cations Zn dendrite Zn metal anode

Activity Pattern and Habitat Use of Shorebirds in an Artificial Wetland Complex:A Case Study of Breeding Pied Avocet in the Yellow River Delta,china

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Chinese Geographical Science 2024年第4期34卷 618-630页

作者： li Dong li {2. XU He fan Chao WU Yang ZHANG Yuxin HOU Xiyong Yantai Institute of Coastal Zone Research Chinese Academy of SciencesYantai 264003China Beijing VMinFull limited Beijing 100086China CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China University of Chinese Academy of Sciences Beijing 100049China school of Information Engineering Zhejiang Ocean UniversityZhoushan 316022China Key Laboratory for Biodiversity Science and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing 100875China

With the loss of substantial natural wetlands in coastal zones,artificial wetlands provide alternative habitats for many *** management of artificial wetlands used by shorebirds plays an important role in maintaining the stability of shorebird *** tracking technique can obtain high-precision location information of individuals day and night,providing a good technical support for the study of quantitative relationship between waterfowls and their *** this study,satellite tracking method,Remote Sensing(RS)and Geographic Information System(GIS)technology were used to analyze the activity pattern and habitat utilization characteristics of Pied Avocet during breeding period in an artificial wetland complex in the Yellow River Delta(YRD),*** results showed that the breeding Pied Avocets had a small range of activity,with a total core and main home range of 33.10 km^(2. and 2.6.30 km^(2.,*** species tended to forage in the pond and salt pan during the day and night,respectively,with an unfixed staying time in the breeding *** distance between breeding ground and feeding ground was less than 6 *** is emphasized that in addition to improving the conditions of the remaining natural habitats,effective managing artificial habitats is a priority for shorebird *** research could provide reference for the management of artificial wetlands in coastal zones and supply technique support for the protection of shorebirds and their habitats,and alleviate human-bird conflicts and sustainable development of coastal zones.

关键词： satellite tracking home range habitat use artificial wetland coastal zone Pied Avocet Yellow River Delta china

Improved photocatalytic performance of acetaldehyde degradation via crystal plane regulation on truncated octahedral CeO_(2.

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Rare Metals 2024年第5期43卷 2026-2038页

作者： bin Xu Lu Jia Hui Yang Yue Wang Si-Yu fan Sai-Sai Yuan {2.-TaoZhang Ming Zhang Teruhisa Ohno school of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China College of Environmental Science and Engineering Yangzhou UniversityYangzhou225127China Department of Applied Chemistry Faculty of EngineeringKyushu Institute of TechnologyKitakyushu804-8550Japan school of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212000China National&Local Joint Engineering Research Center for Mineral Salt Deep Utilization Huaiyin Institute of TechnologyHuaian 223003China school of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471000China International Collaborative Laboratory of 2. Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

In this study,the truncated octahedral CeO_(2.(CeO_(2.-to)with special morphology was prepared by the solvothermal method with oleic acid(OA)and oleamine(OM)as the morphology-directing ***-resolution transmission electron microscopy(HRTEM)results show that CeO_(2.-to exposes composite{100}and{111}facets,while CeO_(2.cubic(CeO_(2.-c)and CeO_(2.octahedral(CeO_(2.-o)only expose single crystal facets of{100}plane and{111}plane,***,this CeO_(2.-to photocatalyst exhibits remarkable photooxidation performance of gaseous acetaldehyde(CH_(3)CHO)degradation,in which CO_(2.generation value reaches 1.78 and 7.97-times greater than that of CeO_(2.-c and CeO_(2.-o,*** addition,the active species trapping experiment signifies that superoxide(·O_(2.^(-))and holes(h^(+))are the main reactive substances during the CH_(3)CHO degradation process,and the electron paramagnetic resonance(EPR)spectra indicates that the former is the major ***,the electron transfer mechanism between CeO_(2.-to{100}and{111}facets and the surface oxygen adsorption ability are revealed via density functional theory(DFT)*** is also confirmed that{100}facets are more conducive to the absorption of acetaldehyde than{111}***,a reasonable mechanism for improved photocatalytic CH_(3)CHO degradation on CeO_(2.-to is proposed based on relevant experiments and DFT *** study demonstrates that the systematic development of surface homojunction structured photocatalysts can efficiently increase the degradation activity for volatile organic compounds(VOCs).It also offers additional direction for optimizing the photocatalytic activity of other ceriumbased photocatalysts.

关键词： Truncated octahedral CeO_(2.(CeO_(2.-to) Composite crystal faces Surface energy level Efficient electrontransfer