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MoS2 nanorods with inner caves through synchronous encapsulation of sulfur for high performance Li–S cathodes

Journal of Energy Chemistry 2020年第6期29卷 18-24,I0002页

作者： Yikun Yi Zechen Liu Pu Yang Tao Wang Xuewen Zhao Hongyang Huang Yonghong cheng Jinying zhang Mingtao Li Shaanxi Key Laboratory of Energy Chemical Process Intensification School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049ShaanxiChina State Key Laboratory of Electrical Insulation and Power Equipment Center of Nanomaterials for Renewable Energy(CNRE)School of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiChina Guangdong Xi’an Jiaotong University Academy Foshan 528300GuangdongChina School of Environment and Architecture Dongguan University of TechnologyDongguan 523808GuangdongChina

Lithium–sulfur(Li–S)batteries have become one of the most promising candidates for next-generation batteries owing to their high specific capacity,low cost,and *** efforts have been made to mitigate the"shuttle effect"through physical adsorption and chemical ***2 has been proposed as a cathode material to provide effective anchoring sites for lithium polysulfides(Li PSs),but is still limited by its layer ***,we designed novel MoS2 nanorods with inner caves based on our previous work,and performed synchronous encapsulation of sulfur during the synthesis *** outer MoS2 tubular shells physically inhibit the outward diffusion of polysulfide species while the inner particles chemically anchor the polysulfides to prevent *** the cathode matrix in Li–S batteries,the electrochemical results deliver a high initial discharge capacity of 1213 mAhg^-1 for sulfur at 0.1 *** cycling at 1 C for 300 cycles,the cells exhibit a capacity decay of only 0.076%per cycle and high average coulombic efficiency over 95%.The tubular MoS2 structure is an innovative and appealing design,which could be regarded as a prospective substrate for the improved performance of Li–S batteries.

关键词： MoS2 nanorod Inner caves Synchronous encapsulation of sulfur Cathode matrix

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A trifunctional contraceptive gel enhances the safety and quality of sexual intercourse

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Bioactive Materials 2021年第6期6卷 1777-1788页

作者： Mengjie Xie Junlang Li Sichen zhang Dashuai Zhu Xuan Mei Zhenzhen Wang Xiao cheng Zhenhua Li Shaowei Wang Ke cheng The Key Laboratory of Geriatrics Beijing Institute of GeriatricsBeijing HospitalNational Center of GerontologyNational Health CommissionInstitute of Geriatric MedicineChinese Academy of Medical SciencesPR China Department of Molecular Biomedical Sciences North Carolina State UniversityRaleighNC27607USA Joint Department of Biomedical Engineering North Carolina State University&University of North Carolina at Chapel HillRaleighNC27607USA Department of Gynecology and Obstetrics Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesPR China

Current contraceptive methods come with a number of drawbacks,including low efficacy,in the case of commercial contraceptive gels,and a reduction in the quality of sexual intercourse,in the case of *** pharmacologically-active agents to contraceptive gels holds the potential to improve sexual experience,and hardbor safety and *** this study,we fabricated a carbomer-based contraceptive gel consisting of three agents:tenofovir,gossypol acetate,and nitroglycerin(TGN),with pH adjusted to 4.5(to be compatible with the vagina).In vitro,the gossypol component of the contraceptive gel proved to be an effective *** the concentration of gossypol acetate was 10 mg/ml,the spermicidal ability reached 100%after 30 *** addition,tenofovir in the gel significantly inhibited lentiviral transfection efficiency in cell-containing *** 6 pairs of rats,the gel successfully prevented all females from conceiving after successful ***,increased sexual frequency and enhanced erection,which were promoted by the nitroglycerin in the components,were observed in male rats that had the gel applied to their *** novel TGN contraceptive gel yielded a higher contraceptive success rate than that of the commercial contraceptive gel(Contragel®).In addition,it has the added benefits to prevent sexually transmitted diseases and improve male libido and erectile function during sexual *** three FDA-approved and marketed agents together,our trifunctional TGN gel has a great potential for further translation and commercialization.

关键词： Contraceptive Hydrogel Anti-viral Libido Erectile function

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Electronic properties of defects in Weyl semimetal tantalum arsenide

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Chinese Physics B 2018年第9期27卷 462-468页

作者： Yah-Long Fu Chang-Kai Li Zhao-Jun zhang Hai-Bo Sang Wei cheng Feng-Shou zhang Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Beijing Radiation Center Beijing 100875China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of LanzhouLan＇zhou 730000China Ningbo h2stitute of Industrial Technology Chinese Academy of SciencesNingbo 315201China

The tantalum arsenide （TaAs） is a topological Weyl semimetal which is a class of materials of gapless with three- dimensional topological structure. In order to develop a comprehensive description of the topological properties of the Weyl semimetal, we use the density functional theory to study several defects of TaAs after H irradiation and report the electronic dispersion curves and the density of states of these defects. We find that various defects have different influences on the topological properties. Interstitial H atom can shift the Fermi level. Both Ta vacancy with a concentration of 1/64 and As vacancy with a concentration of 1/64 destruct a part of the Weyl points. The substitutional H atom on a Ta site could repair only a part of the Weyl points, while H atom on an As site could repair all the Wevl points.

关键词： Weyl semimetal first-principles calculations band structures density of states

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An online fast multi-track locating algorithm for high-resolution single-event effect test platform

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Nuclear Science and Techniques 2023年第5期34卷 86-100页

作者： Yu-Xiao Hu Hai-Bo Yang Hong-Lin zhang Jian-Wei Liao Fa-Tai Mai cheng-Xin Zhao Institute of modern physics Chinese Academy of SciencesLanzhou 730000China Advanced Energy Science and Technology Guangdong Laboratory Huizhou 516003China University of Chinese Academy of Sciences Beijing 100049China

To improve the efficiency and accuracy of single-event effect(SEE)research at the Heavy Ion Research Facility at Lanzhou,Hi’Beam-SEE must precisely localize the position at which each heavy ion hitting the integrated circuit(IC)causes *** this study,we propose a fast multi-track location(FML)method based on deep learning to locate the position of each particle track with high speed and *** can process a vast amount of data supplied by Hi’Beam-SEE online,revealing sensitive areas in real *** is a slot-based object-centric encoder-decoder structure in which each slot can learn the location information of each track in the *** make the method more accurate for real data,we designed an algorithm to generate a simulated dataset with a distribution similar to that of the real data,which was then used to train the *** comparison experiments demonstrated that the FML method,which has the best performance on simulated datasets,has high accuracy on real datasets as *** particular,FML can reach 238 fps and a standard error of 1.6237μ*** study discusses the design and performance of FML.

关键词： Beam tracks Multi-track location Rapid location High accuracy Synthetic data Deep neural network Single-event effects Silicon pixel sensors HIRFL

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Synthesis and Crystal Structure of 1,4-Bis-(benztriazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene

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Chinese Journal of Structural Chemistry 2005年第3期24卷 279-282页

作者： CAI Yue-Peng HE Guang-Ping CAI Yi zhang Chi SU cheng-Yong KANG Bei-Sheng Dearment of Chemistr South China Normal UniversiyGuanzhou 510631China School of Chemisiry and Chemical Engineering Sun Yer-sen UniversitGuangzhou 510275China School of Pharmacaceutical Sciences Anhui Collegeof Traditional Chinese MedicineHefei 230038China

The title compound 1,4-bis(benztriazol-1-ylmethyl)-2,4,5,6-trimethylbenzene crys- tallizes in the monoclinic system, space group Pbca with a = 9.842(5), b = 9.455(5), c = 22.165(12) ?, V = 2062.6(18) ?3, Dc = 1.277 g/cm3, Z = 4, C24H24N6, Mr = 396.49, μ(MoKa) = 0.079 mm-1 and F(000) = 840. The structure was refined to R = 0.0662 and wR = 0.1891 for 1163 observed reflections (I > 2σ(I)). The title molecule has trans-conformation about the central phenyl ring. The zigzag-like molecules are connected by face-to-face π…π stacking to form an infinite 2D layer.

关键词： bis(benztriazol-1-ylmethyl)-2 4 5 6-trimethylbenzene synthesis crystal structure face-to-faceπ…πinteraction 2D layer

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Regioselective oxidation of tetracycline by permanganate through alternating susceptible moiety and increasing electron donating ability

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Journal of Environmental Sciences 2020年第1期32卷 281-288页

作者： Xiaohua Jiang William AJefferson Dean Song Hanyang cheng Fengmin Li Zhimin Qiang Aiqian zhang Huijuan Liu Jiuhui Qu College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China The State Agriculture Ministry Laboratory of Quality&Safety Risk Assessment for Tobacco Tobacco Research InstituteChinese Academy of Agricultural SciencesQingdao 266101China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Enuironmental SciencesChinese Academy of SciencesBeijing 100085China

Permanganate has attracted much attention in wide range of chemistry and particularly in degradation of environmental ***,few studies have discussed the feature of regioselective reactivity of permanganate with specific moiety of the target ***,we studied the reaction between permanganate and tetracycline that is an emerging micropollutant with different species containing several electron-rich *** second-order rate constants increased from 6.0 to 9.0 and could be quantitatively modeled by considering the speciation of both reactants,yielding kTC0=11.7(mol/L)^-1 sec^-1,kTC-=35.7(mol/L)^-1 sec^-1,kTC2-=43.1(mol/L)^-1 sec^-1 for individual reaction *** products were then identified as the hydroxylated and demethylated *** result suggested a rate-limiting step of simple hydroxylation at the phenolic and/or alkene moieties,while the demethylation should be caused by the unavoidably formed manganese oxide via single electron *** is supported by the DFT calculation,indicating the primary oxidation of phenolic group of TC0 with activation barrier of 44.5 kcal/mol and of alkene group of TC-and TC2-with activation barriers of 44.0 and 43.4 kcal/mol,*** is in agreement with the experimental results,implying the alternation of regioselectivity associated with the deprotonation *** result was further supported by performing the Fukui function and electrostatic potential analysis,reflecting the more probable site and better electron donating tendency beneficial to the permanganate oxidation.

关键词： Permanganate oxidation of tetracycline Regioselective reactivity Rate-limiting hydroxylation step Altered susceptible moiety Increased electronegativity

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The evolution of local structure of Mo6S8 during Li+ electrochemical storage studied by in-situ tender X-ray absorption spectroscopy

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Progress in Natural Science:Materials International 2022年第6期32卷 739-744页

作者： Pengfei Yu Yujian Xia Xuefei Feng Shun Zheng Guoxi Ren Nian zhang Xiaosong Liu cheng Chen Xiangxin Guo State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences National Synchrotron Radiation Laboratory University of Science and Technology of China University of Chinese Academy of Sciences Tianmu Lake Institute of Advanced Energy Storage Technologies School of Physical Science and Technology Shanghai Tech University Shanghai BYD Co. Ltd. College of Physics Qingdao University

Chevrel phase Mo6S8has attracted great interest because of its capability to accommodate different types of small cations through reversible topotactic redox ***,the intercalation mechanism of Mo6S8is still far from being fully understood owing to the complexity of the crystal structure and limitation of the probe *** our study,the reaction mechanism of Li+intercalation into Mo6S8was studied as a model by in-situ tender X-ray absorption spectroscopy(itXAS) in the viewpoint of local *** to the isobestic points of the 1st derivative,the discharge process is divided into five regions while the charge process is divided into four regions,where most of the regions are assigned to the two-phase transition *** intensity change of the two spectroscopic features of the 1st derivative is found to be correlated,implying that the intercluster bond length directly affects the localization of the unoccupied states of the intracluster *** asymmetric evolution of the intensity of a’ and b’ as well as the asymmetric partition of reaction regions demonstrate the asymmetry of the reaction path in discharge and charge *** results help to clarify the remaining debates on the phase ***,itXAS is demonstrated to be a powerful tool to study the reaction mechanism of *** is complementary to NMR,XRD and so on.

关键词： Chevrel phases Cathode materials X-ray absorption In-situ measurement Local structure

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Measuring the Interfacial Thickness of Immiscible Polymer Blends by Nano-probing of Atomic Force Microscopy

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Chinese Journal of Polymer Science 2022年第4期40卷 421-430页

作者： Tian-Tian Li Si-Bo cheng Lian-Fang Feng Xue-Ping Gu Cai-Liang zhang Guo-Hua Hu State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University–Quzhou Quzhou 324000China CNRS-Universitéde Lorraine Laboratoire Réactions et Génie des Procédés(LRGPCNRS UMR 7274)1 rue GrandvilleBP 2045154001 NancyFrance

Immiscible polymer blends are an important family of polymer *** interfacial thickness between different phases is a very important parameter that dictates,to a great extent,the morphology and properties of such a *** work explores and optimizes an up-to-date atomic force microscopy(AFM)of type NanoIR2^(TM) system in order to quantitatively measure the interfacial thickness of immiscible polymer *** system is equipped with two nano-probes capable of detecting the response of a material to an infrared pulse called AFM-infrared spectroscopy mode(AFM-IR)or conducting resonance called AFM-Lorentz Contact Resonance mode(AFM-LCR),*** potential for quantitatively measuring the interfacial thickness of immiscible polymer blends is evaluated using blends composed of polyamide 6(PA6)and polyolefin elastomer(POE)in the presence or absence of a POE containing maleic anhydride(POE-g-MAH)as a *** roughness affects adversely the signal intensity and consequently an accurate measurement of the interfacial *** sample surface preparation procedures are proposed.

关键词： Polymer blends Interfacial thickness Atomic force microscopy Nano-probing Surface roughness

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Tannic acid coated single-wall carbon nanotube membranes for the recovery of Au from trace-level solutions

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Nano Research 2023年第8期16卷 11350-11357页

作者： Chunmei Wang Peng-Xiang Hou Yiming Zhao Chao Shi Jiangang zhang An-Ping Wu Chang Liu Hui-Ming cheng Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Analysis and Test Center Shenyang University of Chemical TechnologyShenyang 110142China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Materials Science and Engineering Institute of Technology for Carbon NeutralityShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

The efficient recovery of gold from industrial sewage is important for saving precious metals and remains a big *** report the extraction of gold ions from a trace-level aqueous solution using a tannic acid(TA)coated single-wall carbon nanotube(SWCNT)*** TA has many redox ligands that efficiently adsorb Au(III)from the solution and reduce them to Au *** interwoven SWCNTs not only act as a framework to improve the mechanical stability of the hybrid membrane,but also provide abundant paths for H_(2)O transport,and facilitate the full exposure of the *** a result,the hybrid membrane has an excellent ability to capture gold ions from solution with a high flux of 157 L/(m^(2)·h·bar),and an ultra-high adsorption capacity of 2095 mg/g from solutions with an extremely low gold concentration of 20 *** adsorbed gold ions are reduced to Au particles,which can be easily collected by *** recovered Au nanoparticles on the TA–SWCNT hybrid film had a remarkable surface-enhanced Raman scattering effect that enabled the sensitive detection of rhodamine 6G.

关键词： carbon nanotube tannic acid membrane Au recovery redox reaction

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An Efficient Trap Passivator for Perovskite Solar Cells:Poly(propylene glycol)bis(2‑aminopropyl ether)

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Nano-Micro Letters 2020年第12期12卷 251-263页

作者： Ningli Chen Xiaohui Yi Jing Zhuang Yuanzhi Wei Yanyan zhang Fuyi Wang Shaokui Cao cheng Li Jizheng Wang CAS Key Laboratory of Organic Solids Beijing National Laboratory for Molecular SciencesInstitute of Chemistry Chinese Academy of SciencesBeijing 100190People’s Republic of China University of Chinese Academy of Sciences Beijing 100190People’s Republic of China Department of Physics Xiamen UniversityXiamen 361005People’s Republic of China CAS Key Laboratory of Analytical Chemistry for Living Biosystems Beijing National Laboratory for Molecular SciencesInstitute of Chemistry Chinese Academy of SciencesBeijing 100190People’s Republic of China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450000People’s Republic of China

Perovskite solar cells(PSCs)are regarded as promising candidates for future renewable energy ***-density defects in the perovskite films,however,lead to unsatisfactory device ***,poly(propylene glycol)bis(2-aminopropyl ether)(PEA)additive is utilized to passivate the trap states in *** PEA molecules chemically interact with lead ions in perovskite,considerably passivate surface and bulk defects,which is in favor of charge transfer and ***,the PEA additive can efficiently block moisture and oxygen to prolong the device *** a result,PEA-treated MAPbI3(MA:CH3NH3)solar cells show increased power conversion efficiency(PCE)(from 17.18 to 18.87%)and good longterm *** PEA is introduced to(FAPbI3)1-x(MAPbBr3)x(FA:HC(NH2)2)solar cells,the PCE is enhanced from 19.66 to 21.60%.For both perovskites,their severe device hysteresis is efficiently relieved by PEA.

关键词： Defects Grain boundaries Passivation Stability Perovskite solar cells

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