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Tungsten disulfide-based nanomaterials for energy conversion and storage

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Tungsten 2020年第2期2卷 109-133页

作者： Chang‑Bin Sun Yu‑Wei Zhong Wen‑Jie Fu Ze‑Quan Zhao Jie Liu Jia Ding Xiao‑peng Han Yi‑Da Deng Wen‑Bin hu Cheng Zhong School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China

Energy and environmental issues received widespread attentions due to the fast growth of world population and rapid development of social *** a transition metal dichalcogenide,tungsten disulfide(WS_(2))nanomaterials make important research progress in the field of energy conversion and *** view of the versatile and rich microstructure of these mate-rials,the modification and controllable synthesis of WS_(2) nanomaterials also inspire a research *** review mainly focuses on WS_(2)-based nanomaterials in the application of energy conversion and storage as well as discusses some basic characteristics and modification strategies of ***,the research progress of WS_(2)-based nanomaterials is reviewed and some prospects for future research directions are *** review is expected to be beneficial to the future study of WS_(2) nanomaterials used in the field of energy conversion and storage.

关键词： Nanomaterials Tungsten disulfide Controlled synthesis Energy conversion Energy storage

Vertical distribution of nonylphenol and nonylphenol ethoxylates in sedimentary core from the Beipaiming Channel, North China

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Journal of Environmental Sciences 2007年第3期19卷 353-357页

作者： JIN Fen hu Jian-ying YANG Min State Key Lab of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China College of Environmental Science Peking University Beijing 100871 China

The vertical profiles of nonylphenol （NP） and nonylphenol ethoxylates （NPEOs） were investigated in a sediment core from the Beipaiming Channel, North China using high sensitive LC-MS and GC-MS metthods In this core, relatively high concentrations of NP and NPEOs occurred in the surface sediment （≤40 cm）, with the maximum value of NP and NPEOs reaching 3539 and 12735 mg/g, respectively, whereas, no NP or NPEOs were detected in deeper sediments （〉40 cm）. The high concentrations of NP and NPEOs in the surface layers suggested recent inputs in this area. NPEOs with short ethoxy chains （NPnEO, n=0-3） were dominant in the NPEO mixture with percentages from 54% to 78%, which were similar to the distribution of homolog NPEO in effluents from nearby sewage treatment plants （STPs）, indicating that the channel received the effluents from these STPs. The sewage treatment ratio was quite similar to that found in North America before the 1980s. Finally, the concentrations of NP and NPEOs were related to the total organic carbon （TOC）（p〈0.001）, suggesting that TOC was an important factor for vertical distribution of NPEOs and NP from the Beipaiming Channel.

关键词： nonylphenol nonylphenol ethoxylates sediment core Bohai Bay

Study on Isoparametric Finite-Element Integral Algorithm of Gravity and Magnetic Anomaly for Body with Complex Shape

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石油地球物理勘探 2009年第2期44卷 125-134页

作者： Kim Kangsop hu Xiang-yun Cho Gyonglae Nam Myonggun Kang Jongnam Kim Gyongchil and Liu hui Institute of Geophysics and Geomatics China University of Geosciences Wuhan Hubei Province 430074 China Engineering Scien3ce Center Kimchaek University of Technology Pyongyang DPRK

重力及磁法勘探的正演问题从本质上说均涉及到积分计算.当前的重磁勘探正演计算方法大部分可归为解析积分法,但是对于一些复杂的形体还难以导出解析式.本文提出了一种计算重力和磁力异常的新算法,其原理是利用在等参数有限元上的高斯数... 详细信息

重力及磁法勘探的正演问题从本质上说均涉及到积分计算.当前的重磁勘探正演计算方法大部分可归为解析积分法,但是对于一些复杂的形体还难以导出解析式.本文提出了一种计算重力和磁力异常的新算法,其原理是利用在等参数有限元上的高斯数值积分公式,直接计算面积元、体积元的异常而实现积分.理论研究和模型计算结果表明,该方法不必计算对数函数及反三角函数,可以保证较高的精确性,程序易实现.特别是此法可以利用曲线、曲面表述任何复杂形态的地质体,为计算任意复杂形体的重磁异常提供了一种新途径.

关键词：等参有限元复杂形状重磁异常积分算法数值积分公式积分计算身体磁法勘探

Mechanical Alloying Effect on the Structure of Fe-Al-(Si) Alloy

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Journal of Materials Science & Technology 1997年第3期13卷 219-222页

作者： Zhang, JQ Wu, BY hu, Z Wang, GQ SOUTHEAST UNIV DEPT MECH ENGNNANJING 210096PEOPLES R CHINA NANJING UNIV DEPT CHEMNANJING 210008PEOPLES R CHINA NANJING UNIV DEPT PHYSNANJING 210008PEOPLES R CHINA

The mechanical alloying effects on the structures of Fe71.3Al28.4(CeO2)(0.3) and Fe73.3Al9.8-Si-16.6(CeO2)(0.3) samples have been investigated mainly by Mossbauer spectroscopy and X-ray diffraction. it is found that with the increase of milling time, a substituting disordered alpha-Fe solution is formed gradually and almost completed after milled for 72 h. Further increasing milling time causes the atomic rearrangement within the powders. Correspondingly, the average lattice parameter and average crystalline size change until 72 h and remain constant after 72 h. The addition of Si leads to the higher disordered degree reflected in the smaller average hyperfine field and larger mean square deviation.

关键词： Iron alloys

Reaction Characteristics of Polysaccharide-Iodine Complexes: A Mini-review

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Paper And Biomaterials 2018年第2期3卷 64-75页

作者： GenQue Fu Nan Li YaJie hu PanPan Yue Feng peng Beijing Key Laboratory of Lignocellulosic Chemistry Beijing Forestry University

The potential reactions between natural polysaccharides and iodine and their products have been explored for a long time. Due to the complex factors that can in？uence these reactions, a clear-cut mechanism has not yet been developed. Starch-iodine complexes, especially the amylose-iodine complex, are the most investigated of the polysaccharide-iodine reactions, and the study of this reaction can be used as a basis for the investigation of other polysaccharide-iodine reactions. In this paper, significant aspects of the reaction were introduced, including the influence of the polysaccharide structure on the properties of the resulting complexes, the relationship between the concentration of CaCl2 and formation of the final products, as well as the form of the polyiodides in these complexes. The interior structure and the surface morphology of the complexes were discussed, along with the progress in research related to this reaction.

关键词： amylose hemicelluloses I2-KI polyiodide polysaccharides

Boosting Cu(In,Ga)Se_(2)Thin Film Growth in Low-Temperature Rapid-Deposition Processes:An Improved Design for the Single-Heating Knudsen Effusion Cell

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Engineering 2021年第4期7卷 534-541页

作者： yunxiang Zhang Shuping Lin Shiqing Cheng Zhichao He Zhaojing hu Zhiqiang Zhou Wei Liu yun Sun Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Institute of Photoelectronic Thin Film and DevicesCollege of Electronic Information and Optical EngineeringNankai UniversityTianjin 300350China Engineering Center of Thin Film Photoelectronic Technology of Ministry of Education Institute of Photoelectronic Thin Film and DevicesCollege of Electronic Information and Optical EngineeringNankai UniversityTianjin 300350China

The Knudsen effusion cell is often used to grow high-quality Cu(In,Ga)Se_(2)(CIGS)thin film in coevaporation ***,the traditional single-heating Knudsen effusion cell cannot deliver complete metal selenides during the whole deposition process,particularly for a low-temperature deposition process,which is probably due to the condensation and droplet ejection at the nozzle of the *** this study,thermodynamics analysis is conducted to decipher the reason for this ***,a new single-heating Knudsen effusion is proposed to solve this difficult problem,which leads to an improvement in the quality of CIGS film and a relative increase in conversion efficiency of 29%at a growth rate of about 230 nmmin1,compared with the traditional efficiency in a lowtemperature rapid-deposition process.

关键词： Cu(In,Ga)Se_(2) Knudsen effusion cell Condensation Droplet ejection Low temperature

Electron-irradiation-facilitated production of chemically homogenized nanotwins in nanolaminated carbides

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Journal of Advanced Ceramics 2023年第6期12卷 1288-1297页

作者： hui Zhang Qianqian Jin Tao hu Xiaochun Liu Zezhong Zhang Chunfeng hu Yanchun Zhou Yu Han Xiaohui Wang Electron Microscopy Center South China University of TechnologyGuangzhou 510640China School of Emergent Sof Mater South China University of TechnologyGuangzhou 510640China Center for the Structure of Advanced Matter School of Electronic EngineeringGuangxi University of Science and TechnologyLiuzhou 545006China Institute of Materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009China Institute of Metals Changsha University of Science&TechnologyChangsha 410004China Electron Microscopy for Materials Research(EMAT) University of AntwerpAntwerp 2020Belgium Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China School of Materials Science&Engineering Zhengzhou UniversityZhengzhou 4501China Advanced Membranes and Porous Materials Center Physical Sciences and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal 23955-6900Saudi Arabia Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Twin boundaries have been exploited to stabilize ultrafine grains and improve mechanical properties of *** production of the twin boundaries and nanotwins is however prohibitively challenging in carbide *** a scanning transmission electron microscope as a unique platform for atomic-scale structure engineering,we demonstrate that twin platelets could be produced in carbides by engineering antisite *** antisite defects at metal sites in various layered ternary carbides are collectively and controllably generated,and the metal elements are homogenized by electron irradiation,which transforms a twin-like lamellae into nanotwin *** chemical homogenization,α-Ti_(3)AlC_(2) transforms to unconventionalβ-Ti_(3)AiC_(2).The chemical homogeneity and the width of the twin platelets can be tuned by dose and energy of bombarding *** homogenized nanotwins can boost hardness by~45%.Our results provide a new way to produce ultrathin(<5 nm)nanotwin platelets in scientifically and technologically important carbide materials and showcase feasibility of defect engineering by an angstrom-sized electron probe.

关键词： electron-irradiation MAX phases carbides antisite defects crystal-structure engineering

Fabrication of bimetallic nanoparticles modified hollow nanoporous carbons derived from covalent organic framework for efficient degradation of 2,4-dichlorophenol

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Chinese Chemical Letters 2021年第8期32卷 2529-2533页

作者： Yanshu Zhang Gongke Li Yufei hu School of Chemistry Sun Yat-sen UniversityGuangzhou 510275China

Bimetallic nanoparticles modified hollow-structured nanoporous carbons(NPCs) have been fabricated via a convenient one-step carbonizing strategy derived from covalent organic *** Pd/Fe/NPCs,Pt/Fe/NPCs and Rh/Fe/NPCs were obtained and can be used as Fenton-like catalysts with good stability and *** catalytic activity was evaluated by the degradation of2,4-dichlorophenl(2,4-DCP).These fabricated bimetallic catalysts exhibited much higher catalytic activity than Fe/NPCs at room *** enhancement of catalytic ability was benefited from synergetic catalytic effect of bimetallic nanoparticles and accelerated mass transfer of hollow ***,the enhanced catalytic mechanism of bimetallic catalysts was studied in detail and the reasonable reaction pathway was ***,the bimetallic catalysts were successfully used for degradation of 2,4-DCP in actual industrial wastewater and the removal efficiency could reach 74.3%within 120 min,which demonstrated the promising potential application of bimetallic catalysts in the removal of pollutants in environment.

关键词： Covalent organic framework Hollow structure N-doped carbon Bimetallic nanoparticles 2 4-Dichlorophenol Degradation

Olmesartan Reduces New-onset Atrial Fibrillation and Atrial Fibrillation Burden after Dual-chamber Pacemaker Implantation in Atrioventricular Block Patients

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Chinese Medical Journal 2016年第18期129卷 2143-2148页

作者： Hang Zhang Chang Pan Juan Zhang Lin-Lin Zhu Kai huang yun Zhong Zuo-Ying hu Department of Cardiology Nanjing First Hospital Nanjing Medical University Nanjing Jiangsu 210006 China

Background： Atrial fibrillation （AF） is the rnost frequent tachyarrhythmia in patients with a permanent pacemaker. Angiotensin II receptor antagonists have a protective effect against the occurrence of AF in patients with heart diseases. This study aimed to assess the effectiveness of olmcsartan in the prevention of new-onset AF and AF burden in atrioventricular block （AVB） patients with dual-chamber （DDD） pacemaker implantation. Methods： This was a single-center, prospective, randomized, single-blind, controlled clinical study. A total of 116 AVB patients, who received DDD pacemakers implantation with the percentage of ventricular pacing （VP%） _〉40% from April 22, 2011 to December 24, 2012, were prospectively randomized to olrnesartan group （20 mg per day; n - 57） or control group （n = 59）. Patients were lbllowed up using pacernaker prograrnming± 12-lead electrocardiography in the intrinsic sinus rhythm, laboratory examinations, and transthoracic echocardiography at 24 months. Atrial high rate events （AHREs） were defined as 180 beats/min over a minimum of 5 min. AF burden was calculated by the number of hours with AHREs divided by the number of measurement hours. Results： Ten （17.5%） patients in the olmesartan group and 24 patients （40.7%） in the control group occurred new-onset AF, and the difference between two groups was statistically significant （P = 0.04）. AF burden was lower in olmesartan group than that in control group （8.02 ± 3.10% vs. 13.66 ± 6.14%, P = 0.04）. There were no significant differences in mean days to the first occurrence of AHREs and mean cumulative numbers of AHREs between two groups （P = 0.89 and P = 0.42, respectively）. Moreover, olmesartan group had smaller values of maximal P-wave durations and P-wave dispersion （PD） after 24 months follow-up compared with the control group （ 109.5 ± 7.4 ins vs. 113.4 ± 7.1 ms, P = 0.00; and 40.6 ± 4.5 ms vs. 43.3 ± 4.4 ins, P - 0.02, respectively）. Left ventricular end-diastolic diameter and left ventri

关键词： Angiotensin II Receptor Antagonist Atrial Fibrillation Olmesartan Pacemaker Ventricular Pacing