检索结果-南通市图书馆

Editorial for rare metals, special issue on photocatalysis

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2019年第5期38卷 359-360页

作者： Tie-Rui Zhang Gang Liu yong-fa zhu Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Chemistry Tsinghua UniversityBeijing 100084China

Burning of fuels is an irreversible entropy increasing process,requiring additional energies derived from the environment to let the process *** theory,photon energy delivered from the sun could fix the huge energy demand in a clean and sustainable *** is such an ideal approach to reconvert inert molecules directly into fuels and other chemical feedstocks using photon energy without any other energy inputs.

关键词： irreversible entropy Editorial photocatalysis

fabrication and properties of silver-based composites reinforced with carbon-coated Ti_(3)AlC_(2)

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1836-1843页

作者： yong-fa zhu Wu-bian Tian Dan-dan Wang Heng Zhang Jian-xiang Ding Pei-gen Zhang Zheng-ming Sun Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China Key Laboratory of Metallurgical Emission Reduction&Resources Recycling Ministry of EducationSchool of Materials Science and EngineeringAnhui University of TechnologyMa’anshan 243002China

Ti_(3)AlC_(2)-reinforced Ag-based composites,which are used as sliding current collectors,electrical contacts,and electrode materials,exhibit remarkable ***,the interfacial reactions between Ag and Ti_(3)AlC_(2) significantly degrade the electrical and thermal properties of these *** diminish these interfacial reactions,we fabricated carbon-coated Ti_(3)AlC_(2) particles(C@Ti_(3)AlC_(2))as reinforcement and prepared Ag–10wt%C@Ti_(3)AlC_(2) composites with carbon-layer thicknesses ranging from 50–200 *** with the uncoated Ag–Ti_(3)AlC_(2) composite,Ag–C@Ti_(3)AlC_(2) was found to have a better distribution of Ti_(3)AlC_(2) *** increases in the carbon-layer thickness,the Vickers hardness value and relative density of Ag–C@Ti_(3)AlC_(2) gradually *** a carbon-layer thickness of 150 nm,we obtained the lowest resistivity of Ag–C@Ti_(3)AlC_(2) of 29.4135.5×10^(−9)Ω·m,which is half that of Ag–Ti_(3)AlC_(2)(66.7×10^(−9)Ω·m).The thermal conductivity of Ag–C@Ti_(3)AlC_(2) reached a maximum value of 135.5 W·m^(−1)·K^(−1) with a 200-nm carbon coating(~1.8 times that of Ag–Ti_(3)AlC_(2)).These results indicate that the carbon-coating method is a feasible strategy for improving the performance of Ag–C@Ti_(3)AlC_(2) composites.

关键词： silver-based composite titanium aluminum carbide carbon coating interfacial reaction properties

In situ revealing C-C coupling behavior for CO2 electroreduction on tensile strain Ptδ+-Cuδ+ dual sites

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第12期43卷 6436-6446页

作者： Feng-Ya Ma Pu Huang Jing Zhou Hong-Wei Zeng Jia-Wei Zhang Hui Zhao Yu-Ming Dong yong-fa zhu Yao Wang School of Chemical and Material Engineering International Joint Research Center for Photorcsponsive Molecules and MaterialsJiangnan University International Joint Research Center for Photoresponsive Molecules and Materials Jiangnan University Department of Chemistry Tsinghua University

Engineering the desired dual metal sites to realize C-C coupling of CO2is of great importance for the practical applications of CO2electroreduction reaction（CER）.Herein,an efficient strategy for constructing heterogeneous Ptδ+-Cuδ+dual sites to strengthen the generation and coupling of*CO and*CHO（or*COH）during CER process is presented in this *** radiilarger Pt not only stabilizes the Cuδ+ut also induces a tensile strain in Ptδ+-Cuδ+dual *** obtained Ptδ+-Cuδ+dual sites achieve a total faradaic efficiency and current density of C2products with 70.9% and586.9 mA·cm-2at-1.20 V（***）,which is higher than that of Cuδ+single site(55.4%,286.9 mA·cm-2).The in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy（ATR-SEIRAS） reveals that the Ptδ+-Cuδ+dual sites can promote the generation of C1intermediates（such as*CO,*COOH,*COH,and*CHO）and C-C *** in situ surface-enhanced Raman spectra demonstrate that Ptδ+Cuδ+dual sites can induce the generation of the high-frequency peak for*COatop,thus accelerating the C-C *** work provides a promising avenue for stabilizing and enhancing the performance of Cuδ+sites toward CER.

关键词： CO2 electroreduction C–C coupling In situ ATR-SEIRAS In situ Raman Ptδ+–Cuδ+ dual sites Tensile strain

A New Many-Body Expansion Scheme for Atomic Clusters:Application to Nitrogen Clusters

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2021年第6期34卷 717-727,I0002页

作者： Wei Yan yong-fa zhu Wei-yu Xie Hong-wei Song Chao-yang Zhang Ming-hui Yang State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621900China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430071China

Although the many-body expansion(MBE)approach is widely applied to estimate the energy of large systems containing weak interactions,it is inapplicable to calculating the energies of covalent or metal *** this work,we propose an interaction manybody expansion(IMBE)to calculate the energy of atomic clusters containing covalent *** this approach,the energy of a system is expressed as the sum of the energy of atoms and the interaction energy between the atom and its surrounding *** IMBE method is first applied to calculate the energies of nitrogen clusters,in which the interatomic interactions are truncated to four-body *** results show that the IMBE approach could significantly reduce the energy error for nitrogen clusters compared with the traditional MBE *** weak size and structure dependence of the IMBE error with respect to DFT calculations indicates the IMBE method has good potential application in estimating energy of large covalent systems.

关键词： Many-body expansion Covalent bond Nitrogen cluster

Trinuclear gold-catalyzed site-selective alkylation of peptides

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 249-256页

作者： Qing-Yun fang Chengyihan Gu Yinghan Chen Wencheng Yan yong Liang Weipeng Li Chengjian zhu Jie Han Jin Xie State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center (Chem BIC) School of Chemistry and Chemical Engineering Nanjing University Green Catalysis Center College of Chemistry Zhengzhou University State Key Laboratory of Natural Medicines China Pharmaceutical University

Selective modification of peptides has always been a challenging issue. The selective alkylation of peptides can alter the biological activity and physical properties of molecules, and it has gained significant research interest. We herein disclose an intriguing gold-catalyzed alkylation of peptides using bench-stable unactivated alkyl bromides under photoredox catalysis. A wide range of structurally diverse primary, secondary and tertiary alkyl bromides serve as effective coupling partners to precisely connect with the α-C(sp3)–H in glycine residue of peptides. This protocol demonstrates an exceptionally broad scope for alkyl halides and excellent tolerance for a wide range of useful functional groups. A series of relay transformations to construct cyclic peptides, to proceed click reaction and to realize peptide fluorescence labeling further enhance its synthetic practicality. In addition, mechanistic studies and density functional theory(DFT) calculations reveal an inner-sphere and subsequent outersphere single electron transfer(SET) mechanism.

关键词： gold catalysis peptide alkylation C-C coupling radical

同方期刊数据库

Recent progress on photoactive nonprecious transition-metal complexes

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan Cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong yong Chen Chang-Jiang Yao Yuan-Yuan zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

The role of innate immune cells in post-hepatectomy liver regeneration

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2023年第2期12卷 267-268页

作者： yong-fa Huang Zhi-Jun zhu Liver Transplantation Center National Clinical Research Center for Digestive DiseasesBeijing Friendship HospitalCapital Medical UniversityBeijingChina Clinical Center for Pediatric Liver Transplantation Capital Medical UniversityBeijingChina

The fame of regeneration has been attributed to the liver ever since the era of Greek mythology,in which Prometheus’liver could grow back overnight against the daily predation of Zeus’*** is the very basis of liver surgery including liver transplantation,and post-hepatectomy liver regeneration remains the center of interest for both clinicians and *** tools for structural and functional assessment of liver regeneration have been constantly developed and validated,laying the groundwork for clinical management and scientific analysis(1).

关键词： Post-hepatectomy liver regeneration innate immune cell cytokine paracrine signaling

基于CATIA的压力容器参数化建模及系列化库的实现

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

机械工程与自动化 2017年第1期 124-126页

作者：孙会明秦永法朱浩周琳单金良李磊扬州大学机械工程学院江苏扬州225127

在零部件的设计中,对于相同结构下不同型号的零部件若在设计中不断地对模型的尺寸进行修改和调整,会极大地延长产品的开发周期及生产效率。针对这一问题,以某企业的一种压力容器系列化产品为例,使用CATIA进行参数化建模,并借助Excel表... 详细信息

在零部件的设计中,对于相同结构下不同型号的零部件若在设计中不断地对模型的尺寸进行修改和调整,会极大地延长产品的开发周期及生产效率。针对这一问题,以某企业的一种压力容器系列化产品为例,使用CATIA进行参数化建模,并借助Excel表建立起一个简单实用的压力容器系列化库,可实现各型号压力容器的快捷调用。经实际应用,证明该设计方法能够快速地设计出满足客户需求的产品,同时可对库中的不同型号产品进行管理和配置。

关键词： CATIA 参数化设计系列化库压力容器

A Review of REE Tracer Method Used in Soil Erosion Studies

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2010年第8期9卷 1167-1174页

作者： zhu Ming-yong TAN Shu-duan LIU Wen-zhi ZHANG Quan-fa Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden Chinese Academy of Sciences Wuhan 430074 P.R.China College of Bioscience and Biotechnology Hunan Agricultural University Changsha 410128 P.R. China Graduate University Chinese Academy of Sciences Beijing 100049 P.R. China

Rare earth elements （REEs） have been proved ideal tracers for soil erosion and aggregation. REE tracer method （REETM） used to study soil erosion, as a new technique, has been developed in recent 20 yr. It is able to quantitatively monitor the temporal and spatial variation of erosion intensity, compared with traditional approaches. The applications of REETM in studying of sediment differentiation law, erosion process evolution, determination of sediment sources and sedimentation investigations, and determination of prediction parameters, were reviewed. Some application limitations were summarized.

关键词： soil erosion rare earth element (REE) REE tracer method (REETM) research progress