检索结果-南通市图书馆

Recent advances of carbon fiber-based self-supported electrocatalysts in oxygen electrocatalysis

Journal of Energy Chemistry 2024年第11期 334-363页

作者： Jinyu Han Nanping Deng Hao Chi Gang Wang Yilong Wang Qiang zeng Zhaozhao Peng Bowen cheng Baoming Zhou Weimin Kang State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and Engineering Tiangong University

Oxygen reduction reaction(ORR) and oxygen evolution reaction(OER) are the key reactions in numerous renewable energy devices. Unlike conventional powdered catalysts, self-supported catalysts are extensively employed in oxygen electrocatalysis because of the enhanced electron-transfer rate, high specific surface area, and superior mechanical flexibility. Among the self-supported conductive substrates, carbon fiber usually exhibits several distinctive advantages, such as a straightforward preparation process, relatively low cost, good stability, and excellent conductivity. Against this background,carbon fiber-based self-supported electrocatalysts have been widely applied and studied in oxygen electrocatalysis, indicating a promising development direction in oxygen electrocatalyst ***, it is essential to offer an overall summary of the research progress in this field to facilitate its subsequent development. Taking the regulatory mechanisms and modification methods as a starting point, this review comprehensively summarizes recent research on carbon fiber-based self-supported electrocatalysts in recent years. Firstly, a brief overview of the synthesis methods and regulatory mechanisms of carbon fiber-based self-supported electrocatalysts is given. Furthermore, the view also highlights the modification methods and research progress of self-supported electrocatalysts synthesized on carbon fiber-based substrates in recent years in terms of different dopant atoms. Finally, the prospects for the application of self-supported electrocatalysts based on carbon fiber in oxygen electrocatalysis and the possible future directions of their development are presented. This review summarizes recent developments and applications of self-supported bi-functional electrocatalysts with carbon fiber-based materials as the conducting substrate in oxygen electrocatalysis. It also lays a robust scientific foundation for the subsequent reasonable design of highly effective carbon fib

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

High precision current mirror circuit based on two-dimensional material transistors

引用

Science China(Information Sciences) 2024年第8期67卷 353-354页

作者： Shiping GAO Chen PAN Pincheng SU Xing-Jian YANGDONG Wentao YU Zhoujie zeng Yu SHEN Jingwen SHI Yanwei CUI Pengfei WANG Yuekun YANG Cong WANG Bing cheng Shi-Jun LIANG Feng MIAO Institute of Interdisciplinary Physical Sciences School of Physics Nanjing University of Science and Technology Institute of Brain-Inspired Intelligence National Laboratory of Solid State Microstructures School of PhysicsCollaborative Innovation Center of Advanced Microstructures

The emerging two-dimensional field-effect transistor(2DFET) is considered an important candidate device for driving future integrated circuit technology toward higher performance, lower power consumption, and more functionalities [1,2]. Among the integrated circuits, analog circuits play a crucial role as they are responsible for sampling, amplifying, and transmitting signals.

关键词： Timing circuits

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Review of 2D Bi_(2)X_(3)(X=S,Se,Te):from preparation to photodetector

引用

Rare Metals 2024年第6期43卷 2349-2370页

作者： Zhi zeng Dong-Bo Wang Xuan Fang Jia-Mu Cao Bing-Ke Zhang Jing-Wen Pan Dong-Hao Liu Si-Hang Liu Shu-Jie Jiao Tian-Yuan Chen Gang Liu Lian-cheng Zhao Jin-Zhong Wang Department of Optoelectronic Information Science School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Changchun University Science and Technology School of PhysicsThe State Key Laboratory of High Power Semiconductor LasersChangchun 130022China School of Astronautics Harbin Institute of TechnologyHarbin 150001China Center for High Pressure Science and Technology Advanced Research Shanghai 201203China

Detector has become an indispensable part of human *** increasing demand for photodetectors with high performance has promoted the research of novel *** the same time,with the development of rising material system,two-dimensional(2D)materials attract a lot of attention,while the suitable option for fabricating photodetector is still *** prospering of bismuth chalcogenides injected new vitality for material field,thereinto,the unique topological insulator characteristics make the research on bismuth selenide(Bi_(2)X_(3))and bismuth telluride(Bi_(2)X_(3)) intriguing.2D Bi_(2)X_(3) also exhibits unique features among various 2D materials,of which,the adjustable narrow energy band gap and polarization-sensitive photocurrent contribute to the promising application of high performance and broadband *** this review,from a bottom-up perspective,we summarize fundamental properties,synthesis method,photodetector performance of 2D Bi_(2)X_(3) based on the previous study,which provide an overall perspective of 2D Bi_(2)X_(3).Wherein,the section of the photodetector is specifically discu ssed with regard to pure Bi_(2)X_(3) photodetector and heterojunction photodetector.A brief summary and outlook were also explored in the end.

关键词： Bi_(2)X_(3) Preparation 2D Photodetector

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A H_(4)SiW_(12)O_(40)-catalyzed three-component tandem reaction for the synthesis of 3,3-disubstituted isoindolinones

引用

Chinese Chemical Letters 2024年第1期35卷 233-236页

作者： Yufeng Liu Guodong zeng Yutao cheng Lei Chen Yunhai Liu Yongge Wei Guoping Yang School of Chemistry Biology and Material ScienceJiangxi Province Key Laboratory of Synthetic ChemistryJiangxi Key Laboratory for Mass Spectrometry and InstrumentationEast China University of TechnologyNanchang 330013China Key Lab of Organic Optoelectronics&Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

A H_(4)SiW_(12)O_(40)-catalyzed three-component tandem reaction of 2-acylbenzoic acids,primary amines and phosphine oxides to form 3,3-disubstituted isoindolinones was *** employing A H_(4)SiW_(12)O_(40)as the catalyst and dimethyl carbonate(DMC)as the solvent,a diverse range of 2-acylbenzoic acid derivatives and primary amines worked well to give the C3-phosphinoyl-functionalized 3,3-disubstituted isoindolinones with the yield range of 61%-87%.Advantages of this transformation include green catalyst and solvent,available starting materials,broad substrate scope,high efficiency and operational simplicity with water as the sole *** strategy achieved an efficient and green molecular fragment assembly to access isoindolinones,which would provide opportunities for the synthesis of potential biologically active molecules in a green manner.

关键词： Polyoxometalates Dehydrative coupling Three-component tandem reaction 3,3-Disubstituted isoindolinones Organic carbonate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Versatile carbon-based materials from biomass for advanced electrochemical energy storage systems

引用

eScience 2024年第5期4卷 27-69页

作者： Ziyi Zhu Yongling Men Wenjia Zhang Wenhao Yang Fei Wang Yanjia Zhang Yiyong Zhang Xiaoyuan zeng Jie Xiao cheng Tang Xue Li Yingjie Zhang National and Local Joint Engineering Research Center of Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China Instituto de Ciencia de Materiales de Madrid Consejo Superior de Investigaciones CientíficasCampus de CantoblancoMadrid 28049Spain Department of Chemistry and Life Science Yokohama National UniversityYokohama 240-8501Japan Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

The development of new energy storage technology has played a crucial role in advancing the green and low-carbon energy *** has led to significant progress,spanning from fundamental research to its practical application in industry over the past ***,the constrained performance of crucial materials poses a significant challenge,as current electrochemical energy storage systems may struggle to meet the growing market *** recent years,carbon derived from biomass has garnered significant attention because of its customizable physicochemical properties,environmentally friendly nature,and considerable economic *** review aims to provide a comprehensive overview of the production-application chain for biomass-derived *** provides a comprehensive analysis of morphology design,structural regulation,and heteroatom-doping modification,and explores the operational mechanisms in different energy storage ***,considering recent research progress,the potential uses of biomass-derived carbon in alkali metal-ion batteries,lithium–sulfur batteries,and supercapacitors are thoroughly assessed,offering a broader outlook on the emerging energy ***,based on the technical challenges that need to be addressed,potential research directions and development objectives are suggested for achieving large-scale production of biomass-derived carbon in the field of energy storage.

关键词： Biomass-derived carbon Energy storage mechanisms Alkali metal-ion batteries Lithium–sulfur batteries Supercapacitors

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

镉胁迫对秋华柳根系活力及其Ca、Mg、Mn、Zn、Fe积累的影响

引用

应用生态学报 2016年第4期27卷 1109-1115页

作者：刘媛马文超张雯曾成城陈锦平魏虹西南大学生命科学学院三峡库区生态环境教育部重点实验室重庆400715

以秋华柳为试验材料,采用水培试验方式,设置CK(0 mg·L^(-1)Cd^(2+))、T_1(2 mg·L^(-1)Cd^(2+))、T_2(10 mg·L^(-1)Cd^(2+))、T_3(20 mg·L^(-1)Cd^(2+))、T_4(50 mg·L^(-1)Cd^(2+))5种镉处理浓度,通过对秋华柳根系活力,叶、韧皮部、木质部和根部的镉含量,以及Ca、Mg、Mn、Zn、Fe 5种常规金属元素含量的测定,研究了不同浓度镉胁迫下秋华柳根系活力及Ca、Mg、Mn、Zn、Fe等金属元素含量的变化.结果表明:1)秋华柳根系活力随着镉处理浓度的增加而逐渐下降,当镉浓度≥10 mg·L^(-1)时,根系活力与对照相比显著下降.2)随着镉处理浓度的增加,秋华柳叶中Fe的积累受到显著抑制;韧皮部Mg、Mn、Fe的积累受到显著抑制;木质部Ca、Mg、Mn、Zn、Fe等5种常规金属元素的积累无显著性差异;根部5种常规金属元素的吸收和积累受到显著抑制,表现出镉对其他金属元素积累的拮抗作用.其中,50 mg·L^(-1)的镉胁迫下,根部Zn的积累量降幅最大,受Cd的抑制最明显.3)各处理组Fe的转移系数与对照相比均无显著性差异;Ca、Mg、Mn、Zn的转移系数均高于对照,且在一定的镉处理水平上差异显著.4)镉胁迫下,秋华柳根部镉的积累量与Ca的积累量呈显著负相关,与其他4种常规金属元素的积累量呈极显著负相关,说明根部常规金属元素的变化可作为秋华柳受镉毒害程度的指示之一.

关键词：镉胁迫秋华柳根系活力金属元素

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

美国保守派智库涉台议题框架建构及中国对策--基于哈德逊研究所的分析

引用

智库理论与实践 2024年第3期9卷 136-145页

作者：曾诚刘蔚中国人民公安大学国家安全学院北京100038

[目的/意义]哈德逊研究所(Hudson Institute)作为美国典型的保守派智库,是影响美国涉台政策的重要机构。对哈德逊研究所涉台议题的框架建构进行剖析和总结,有助于中国智库更好地研判和评估美国涉台政策走向。[方法/过程]本文以哈德逊研... 详细信息

[目的/意义]哈德逊研究所(Hudson Institute)作为美国典型的保守派智库,是影响美国涉台政策的重要机构。对哈德逊研究所涉台议题的框架建构进行剖析和总结,有助于中国智库更好地研判和评估美国涉台政策走向。[方法/过程]本文以哈德逊研究所发布的40余份涉台研究成果作为研究样本,结合诊断式框架、预后式框架及促动式框架总结其涉台议题的观点与特征,发现“以台制华”战略贯穿于哈德逊研究所对台湾问题的制造到炒作过程。[结果/结论]哈德逊研究所涉台议题的框架建构的本质是贯彻美国“以台制华”的对华战略,维护美国的国际霸权地位。两岸智库应在认清其本质的同时,加深彼此良性互动,提升中国国际话语权,为抵御美国保守派智库干扰中美关系走向正常化、巩固两岸和平发展贡献力量。

关键词：哈德逊研究所美国智库涉台议题国家安全 “以台制华”

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

太滆运河流域农田土壤重金属污染特征与来源解析

引用

环境科学 2019年第11期40卷 5073-5081页

作者：李伟迪崔云霞曾撑撑朱永青彭月王凯李士俊南京师范大学环境学院南京210023 南京农业大学资源与环境科学学院南京210095

为探明太滆运河流域农田土壤重金属污染分布特征及主要影响因素,保证土壤环境质量及农产品安全.采集并分析了太滆运河流域118个农田表层土壤样品中Cr、Hg、As、Cu、Zn、Ni、Pb和Cd等8种重金属元素含量.以太湖流域土壤背景值为评价标准,... 详细信息

为探明太滆运河流域农田土壤重金属污染分布特征及主要影响因素,保证土壤环境质量及农产品安全.采集并分析了太滆运河流域118个农田表层土壤样品中Cr、Hg、As、Cu、Zn、Ni、Pb和Cd等8种重金属元素含量.以太湖流域土壤背景值为评价标准,利用单因子指数和内梅罗指数评价土壤重金属污染状况,利用多元统计分析与地统计分析相结合的方法,对土壤重金属空间分布及来源进行解析.结果表明:8种重金属元素(Cr、Hg、As、Cu、Zn、Ni、Pb和Cd)的平均含量分别为63.25、0.25、7.83、35.24、77.25、31.48、38.37和0.16 mg·kg^-1,除Cr和As外,其余元素含量均超过太湖流域土壤背景值.土壤样点重金属含量多低于国家农用地土壤污染风险筛选值.内梅罗综合指数显示87.29%样点的土壤重金属呈现轻度污染,5.93%样点呈现中度污染,6.78%样点呈现重度污染,整体已经超过警戒值,处于轻度污染状态.流域农田土壤中Hg、Cu、Zn、Pb和Cd受到农业活动和大气沉降的共同影响;Cr和Ni则受成土母质以及工业生产活动的共同影响;As则主要来源于成土母质.

关键词：太滆运河流域土壤重金属空间分布污染评价来源解析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Opening the“Black Box”:How Out-of-Class Use of Duolingo Impacts Chinese Junior High School Students'Intrinsic Motivation for English

引用

ECNU Review of Education 2024年第2期7卷 283-307页

作者：曾成 Linda Fisher 184 Hills Road Cambridge CB28PQUK

Purpose:Mobile-assisted language learning(MALL)apps such as Duolingo have great potential for promoting learners'motivation to learn a second language(L2).However,little research has investigated how this motivational impact takes ***,despite the flexibility of mobile learning,most existing studies are conducted in classroom settings,with less attention paid to out-of-school technology ***/Approach/Methods:To address these gaps,we present a model based on self-determination theory and propose the idea of“motivational transfer”to explain the psychological mechanism underpinning the impact of *** examine the model,we conducted a case study with 20 Year 8 Chinese junior school students who used Duolingo to learn English as a foreign language(EFL)after school for 6 ***:Questionnaire and group interview data support our hypothesized mechanism:learners'activity-specific intrinsic motivation(IM)for using Duolingo and their underlying psychological need for autonomy and competence can be transferred to a more general level,thereby enhancing learners'global ***:The proposed theoretical model expands our understanding of how digital technology stimulates learners'L2 motivation;it can help L2 educators design better technological affordances to promote learners'motivation both in and outside the classroom.

关键词： Digital game-based learning L2 motivation MALL self-determination theory

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

引用

第二军医大学学报 2016年第10期37卷 1239-1244页

作者：王秋红曾程程牟旆高连娣沈亚魏锐利第二军医大学长征医院眼科上海200003

目的探讨香烟烟雾提取物(CSE)及尼古丁对甲状腺相关眼病(TAO)氧化应激的影响,并以NF-κB为靶点探索其可能的分子机制。方法取5例无吸烟史的TAO患者和3例无吸烟史的因其他原因行眼外科手术的患者(对照患者)的眼外肌组织,原代培养眼外肌... 详细信息

目的探讨香烟烟雾提取物(CSE)及尼古丁对甲状腺相关眼病(TAO)氧化应激的影响,并以NF-κB为靶点探索其可能的分子机制。方法取5例无吸烟史的TAO患者和3例无吸烟史的因其他原因行眼外科手术的患者(对照患者)的眼外肌组织,原代培养眼外肌来源的眼眶成纤维细胞(OFs)。将OFs经10%CSE、0.5μg/mL尼古丁、10μg/mL尼古丁分别作用,即为CSE组、低浓度尼古丁组和高浓度尼古丁组。分别培养24、72h后分别采用MTT法、ELISA法和分光光度计法检测各组细胞活性、8-羟脱氧鸟苷(8-OHdG)水平及丙二醛(MDA)含量;24h后采用酶标仪法检测活性氧(ROS)水平,RTPCR法检测NF-κB mRNA水平。结果干预24及72h后,TAO患者及对照患者OFs的细胞活力在CSE作用下均下降(P<0.05),且TAO患者对OFs更敏感。高浓度尼古丁干预24h后,TAO患者OFs的8-OHdG水平增加(P<0.05);低浓度尼古丁干预72h时,OFs的8-OHdG水平也增加(P<0.05)。TAO患者及对照患者OFs经CSE或不同浓度尼古丁干预72h后的MDA含量均增加(P<0.01)。高浓度尼古丁干预24h后,TAO患者OFs中ROS水平上升(P<0.01)。CSE干预24h后,TAO患者OFs中NF-κB mRNA的表达上升(P<0.05);而对照患者OFs NF-κB mRNA的表达经CSE及高浓度尼古丁干预后下降(P<0.05)。结论吸烟可通过激活TAO患者OFs的氧化应激参与TAO的病理过程,即使吸烟量较少,经时间累积也可能发挥作用,其机制可能是通过上调NF-κB mRNA的表达来实现的。

关键词：吸烟尼古丁氧化性应激 NF-κB 甲状腺相关眼病

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：