检索结果-南通市图书馆

Metal-organic frameworks with dinuclear metal centers for synergistically boosting CO2 photoreduction

Science China Chemistry 2025年第1期68卷 201-208页

作者： Hui-feng Wang Wen-Jie Shi Yu-Xin yang Bao-Xia Dong Tong-Bu Lu Di-Chang Zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of Co Zn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,the catalytic activities of Co Ni-In and Ni Zn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

关键词： metal-organic frameworks dinuclear metal centers synergistic catalysis CO2 reduction photocatalysis

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

Veno-venous extracorporeal membrane oxygenation for patient with a history of open cholecystectomy and acute respiratory distress syndrome caused by coinfection of avian influenza A (H7N9) and Epstein-Barr virus

引用

Chinese Medical Journal 2019年第11期132卷 1363-1364页

作者： Yong Yuan Wen-Da Guan Hai-Ming Jiang Jian-Wei Li Bin-Fei Li Wei-Jia Wang zi-feng yang Rong-Chang Chen Nan-Shan Zhong Yun-Ceng Weng Department of Emergency Sun Yat-Sen University Affiliated Zhongshan Hospital Sun Yat-Sen University Zhongshan Guangdong 528403 China State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory Health the First Affiliated Hospital of Guangzhou Medical University Guangzhou Guangdong 510120 China

To the Editor:Most patients infected with avian influenza A (H7N9) rapidly develop progressive pneumonia and acute respiratory distress syndrome (ARDS), a heterogeneous disorder that is refractory to conventional mechanical ventilation. Most H7N9 patients also have underlying disease such as chronic obstructive pulmonary disease, hypertension, diabetes mellitus, and heart diseases, and are more susceptible to coinfections. For these patients with such serious complications, extracorporeal membrane oxygenation (ECMO) support can be adopted as a feasible life-saving therapy Here, we present our successful experience with ECMO utilized in a patient with ARDS and also with H 7N9 and Epstein-Barr virus (EBV) infection.

关键词： Most people are infected with avian influenza A (H7N9) diabetes mellitus avian influenza

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

High-dense nanocrystalline W-based alloy prepared by hot isostatic pressing with uniform microstructure, ultrahigh hardness and good thermal stability

引用

Tungsten 2025年第1期7卷 120-136页

作者： Zao-Ming Wu Lin He Lin-Sen Ye Xiao-feng yang Jia-Jia Zhang Hong-Bo Lei Institute of Materials China Academy of Engineering Physics

High-density uniform microstructure nanocrystalline W-10wt.% Cr-5wt.% Y（W-10Cr-5Y） alloy with an average grain size of 85 nm and a relative density of 99.8% was successfully prepared.W-Cr-Y alloys with different amounts of second-phase particles were prepared by high-energy ball milling and hot isostatic pressing *** effects of composition design,ball milling parameters,and sintering parameters on the microstructure of W-Cr-Y alloys were studied.A feasible technology for controlling the synthesis of high-density nanocrystalline W-based alloys has been *** microstructure analysis of nanocrystalline W-10Cr-5Y alloy shows that there are two types of doping in the second phase:intergranular doping and intragranular *** "uniform distribution YOx-rich particles" effectively suppresses the grain growth of W and leads to the formation of nanocrystalline W-10Cr-5Y alloy.W-10Cr-5Y has an ultra-high hardness,with a Vickers hardness of 1312±12 kgf·***-temperature annealing treatment shows that W-10Cr-5Y has good thermal stability at 1000 and1100℃,as demonstrated by the comparison of Vickers hardness and grain size between annealed and unannealed alloys.

关键词： Hot isostatic pressing Microstructure Nanocrystalline tungsten Thermal stability Vickers hardness

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

Constructing quasi-2D perovskite to collect hot carriers to reduce open-circuit voltage loss for efficient inverted perovskite solar cells

引用

Science China Chemistry 2025年

作者： Lei Gu Xing Li Chao Wu yang feng Chunming yang Lin Song Frontiers Science Center for Flexible Electronics Institute of Flexible Electronics Northwestern Polytechnical University Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences

Inverted perovskite solar cells （PSCs） have received great attention owing to the high certificated power conversion efficiency（PCE） reaching 26.7%. However, interfacial charge recombination is far superior to perovskite bulk charge recombination due to the use of fullerenes and their derivatives in inverted perovskite solar cells, which induces devastating open circuit voltage（VOC） losses. For this reason the present work attempts to use 4-chloropiperidine hydrochloride for the upper surface modification of perovskite to construct a quasi-two-dimensional （2D） structure with suitable 2D layer widths （n=2, 3 dominant）,which has a smaller electron carrier transport barrier without sacrificing short-circuit current （JSC） in the device. This strategy effectively passivates the interfacial defect states while promoting energy level alignment to achieve carrier dissociation and equilibrium transport at the interface, which in turn resulted in improved fill factor （FF）. In addition, additional energy levels are provided by 2D perovskites to collect hot carriers, resulting in improved device open circuit voltage （VOC）. As a result, the device PCE increases from 22.37%to 24.11%after the 4CPD treatment. In addition, the 4CPD-treated PSCs maintain 90%of the initial PCE after storage in an N2atmosphere at 50°C for 1,080 h, whereas the control devices show a 15%PCE loss under the same aging conditions. This work provides new opportunities to suppress interfacial charge recombination in inverted devices.

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

500t/d水煤浆气流床气化炉模拟及优化

引用

化学工程 2021年第6期49卷 67-72页

作者：安海泉方薪晖冯子洋刘臻李烨北京低碳清洁能源研究院北京102209

煤气化过程模拟是一种简单、高效的反映煤气化过程和效果的方法,在降低实验成本,优化运行参数方面均具有重要的作用。文中根据煤气化反应动力学,使用UniSim软件建立了500 t/d水煤浆气流床气化炉模型,并根据3种物料的实验运行结果对模型... 详细信息

煤气化过程模拟是一种简单、高效的反映煤气化过程和效果的方法,在降低实验成本,优化运行参数方面均具有重要的作用。文中根据煤气化反应动力学,使用UniSim软件建立了500 t/d水煤浆气流床气化炉模型,并根据3种物料的实验运行结果对模型进行校核和优化。结果显示:经过校核动力学参数的优化模型(OGM)能够更好地模拟气化过程,有效气成分、冷煤气效率、气化温度和合成气流量等关键参数的最大相对误差小于±3%,平均相对误差小于1.5%。在此基础上,对气化过程进行了优化模拟,提出了工艺参数的优化方向。

关键词：煤气化模拟 UniSim

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

应用空斑形成法检测五种不同细胞对肠道病毒71型的敏感性

引用

世界华人消化杂志 2009年第6期17卷 573-577页

作者：杨子峰秦笙莫自耀关文达王玉涛呼吸疾病国家重点实验室(广州医学院).广州医学院第一附属医院广东省广州市510230

目的:建立肠道病毒71型(EV71)的空班形成方法,并比较BGM、VeroE6、MRC-5、HEp-2及A549五种细胞对EV71病毒的敏感性.方法:将不同稀释浓度的EV71病毒接种到五种细胞,分别覆盖三种不同的培养物,孵育一定时间后固定染色,比较出斑效果;以新... 详细信息

目的:建立肠道病毒71型(EV71)的空班形成方法,并比较BGM、VeroE6、MRC-5、HEp-2及A549五种细胞对EV71病毒的敏感性.方法:将不同稀释浓度的EV71病毒接种到五种细胞,分别覆盖三种不同的培养物,孵育一定时间后固定染色,比较出斑效果;以新建空斑形成法测定五种细胞感染EV7124-96h后培养液滴度,计算空班形成单位(pfu).结果:在五种细胞中,BGM和VeroE6覆盖琼脂糖凝胶的EV71可形成针尖样空班;覆盖1%甲基纤维素的EV71可形成直径大约1mm圆形或类圆形空班,形成空斑单位最多,病毒滴度分别达2.87×109pfu/L和1.65×109pfu/L;覆盖1.2%艾维素的EV71在BGM细胞中可形成直径大约0.5mm类圆形空斑,在VeroE6细胞中形成针尖样空斑;其他细胞均形成针尖样空斑.结论:空斑形成方法可对肠道病毒进行定量检测,BGM及VeroE6细胞为EV71的敏感细胞.

关键词：肠道病毒71型空斑形成试验细胞定量测定

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

Universal design of three-dimensional porous graphene-iron based promotors for kinetically rationalized lithium-sulfur chemistry

引用

Journal of Energy Chemistry 2025年第1期100卷 192-200页

作者： Hua Gao Yunfeng Zhang Menglei Wang Ruoxuan yang Shuai feng Xuan Cao Yaping Zhang Zhongyuan Lu Yingze Song State Key Laboratory of Environment-Friendly Energy Materials School of Materials and Chemistry Southwest University of Science and Technology School of Material Science and Engineering Henan University of Technology College of Chemistry and Chemical Engineering Taishan University

Lithium-sulfur （Li-S） batteries are widely deemed to be one of the most potential candidates for future secondary batteries because of their remarkable energy ***,notorious polysulfide shuttling and retarded sulfur reaction kinetics pose significant obstacles to the further application of Li-S *** rationally designed highly active electrocatalysts can facilitate polysulfide conversion,the universal and scalable synthesis strategies need to be ***,a universal synthetic strategy to construct a series of three-dimensional （3D） porous graphene-iron （3DGr-Fe） based electrocatalysts involving 3DGr-FeP,3DGr-Fe3C,and 3DGr-Fe3Se4is exploited for manipulating the Li-S redox *** has been observed that the implementation of a 3D porous Gr architecture leads to the well-designed conductive networks,while the uniformly dispersed iron nanoparticles introduce an abundance of active sites,fostering the lithium polysulfide conversion,thereby bolstering the overall electrochemical *** Li-S battery with the 3DGr-Fe based electrocatalyst exhibits remarkable capacity retention of 94.8%upon 100 times at 0.2 ***,the soft-packaged Li-S pouch cell based on such a 3DGr-Fe electrocatalyst delivers superior capacity of 1060.71 mA h g-1and guarantees for the continuous 30 min work of fan *** investigation gives comprehensive insights into the design,synthesis,and mechanism of 3DGr-Fe based electrocatalysts with high activity toward efficient and durable Li-S batteries.

关键词： Redox reactions

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

ADS-B Data Authentication Based on ECC and X.509 Certificate

引用

Journal of Electronic Science and Technology 2012年第1期10卷 51-55页

作者： Wei-Jun Pan,zi-Liang feng,and yang Wang the College of ComputerScience,Sichuan University,Chengdu 610065,Chinah the College of Aviation Management,the Civil Aviation Flight University of China,Guanghan 618307,China. The College of Computer Science Sichuan UniversityChengdu 610065China The College of Aviation Management the Civil Aviation Flight University of ChinaGuanghan 618307China. The College of Computer Science Sichuan UniversityChengdu 610065China

An automatic dependent surveillance- broadcast （ADS-B） system has serious security problems, and the data can be spoofed during broadcasting precise position information of aircraft. A solution of the ADS-B system data authentication based on the elliptic curve cipher （ECC） and X.509 certificate is proposed. It can avoid the key distribution problem by using the symmetric key algorithm and prevent the ADS-B data from being spoofed thoroughly. Experimental test results show that the solution is valid and appropriate in ADS-B universal access transceiver （UAT） mode.

关键词： Automatic dependent surveillance-broadcast data authentication elliptic curve cipher,X.509.

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

Experimental demonstration of 220-GHz terahertz signals wireless transmission over 4.6 km

引用

Science China(Information Sciences) 2025年第1期68卷 386-388页

作者： Yi WEI Jianjun YU Mingxu WANG Xiongwei yang Qiutong ZHANG Jingwen TAN Bing ZHANG Ying WU yang HAN Peng TIAN Wen ZHOU Kaihui WANG feng ZHAO State Key Laboratory of ASIC and System Key Laboratory for Information Science of Electromagnetic Waves (MoE)School of Information Science and Technology Fudan University School of Electronic Engineering Xi'an University of Posts and Telecommunications

The advancement of terahertz (THz) communication technology drives the evolution of wireless communication systems,offering novel pathways and technical means for the development of future 6G communication *** wireless communication systems are often constrained by bandwidth limitations of electronic devices in high frequency ***,THz communication technology leverages the characteristics of electromagnetic waves to transcend these limitations,enabling communication athigher frequencies and wider bandwidths.

关键词：

来源：

同方期刊数据库

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

飞行计划与雷达航迹关联算法及实现

引用

四川大学学报（自然科学版） 2003年第1期40卷 171-173页

作者：冯子亮杨红雨游志胜四川大学图象图形研究所成都610064

Authors concern a algorithm of the association with flight plan and dynamic track. A physical model and a formula is provided to describe the association process. It converts the association problem to the optimizatio... 详细信息

关键词：飞行计划雷达航迹关联算法空管自动化系统飞行管制飞行安全

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：