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Science Bulletin 2018年第10期63卷 599-600页

作者： xiong wen(david)lou School of Chemical and Biomedical Engineering. Nanyang Technological University Singapore 637459 Singapore

Solar water splitting for hydrogen generation using semiconductor photocatalysts is a promising approach for developing renewable energy sources[1,2].To enhance the performance of semiconductor photocatalysts,cocatalytic materials are normally utilized to accelerate surface redox *** most cases,cocatalysts are randomly decorated on the surface of photocatalysts,

关键词：氧化还原作用半导体光催化剂空间异质氢表面水

Embedding CoS2 nanoparticles in N-doped carbon nanotube hollow frameworks for enhanced lithium storage properties

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Nano Research 2017年第12期10卷 4298-4304页

作者： Jintao Zhang Le Yu xiong wen (david) lou School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore

The construction of metal sulfides-carbon nanocomposites with a hollow structure is highly attractive for various energy storage and conversion technologies. Herein, we report a facile two-step method for preparing a nanocomposite with CoS2 nanoparticles in N-doped carbon nanotube hollow frameworks （NCNTFs）. Starting from zeolitic imidazolate framework-67 （ZIF-67） particles, in situ reduced metallic cobalt nanocrystals expedite the formation of the hierarchical hollow frameworks from staggered carbon nanotubes via a carbonization process. After a follow-up sulfidation reaction with sulfur powder, the embedded cobalt crystals are transformed into CoS2 nanoparticles. Benefitting from the robust hollow frameworks made of N-doped carbon nanotubes and highly active CoS2 ultrafine nanoparticles, this advanced nanocomposite shows greatly enhanced lithium storage properties when evaluated as an electrode for lithium-ion batteries. Impressively, the resultant CoS2/NCNTF material delivers a high specific capacity of -937 mAh.g-1 at a current density of 1.0 A-g-1 with a cycle life longer than 160 cycles.

关键词： COS2 carbon nanotube metal-organic framework lithium-ion batteries

Metal–Organic Framework-Assisted Synthesis of Compact Fe_2O_3 Nanotubes in Co_3O_4 Host with Enhanced Lithium Storage Properties

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Nano-Micro Letters 2018年第3期10卷 70-78页

作者： Song Lin Zhang Bu Yuan Guan Hao Bin Wu xiong wen david lou School of Chemical and Biomedical Engineering Nanyang Technological University School of Materials Science and Engineering Zhejiang University

Transition metal oxides are promising candidates for the high-capacity anode material in lithium-ion *** electrochemical performance of transition metal oxides can be improved by constructing suitable composite architectures. Herein, we demonstrate a metal–organic framework(MOF)-assisted strategy for the synthesis of a hierarchical hybrid nanostructure composed of Fe_2O_3 nanotubes assembled in Co_3O_4 host. Starting from MOF composite precursors(Fe-based MOF encapsulated in a Cobased host matrix), a complex structure of Co_3O_4 host and engulfed Fe_2O_3 nanotubes was prepared by a simple annealing treatment in air. By virtue of their structural and compositional features, these hierarchical composite particles reveal enhanced lithium storage properties when employed as anodes for lithium-ion batteries.

关键词： Metal–organic framework(MOF) Hierarchical structures Fe2O3 nanotubes Co3O4 Lithium-ion batteries(LIBs)

Synthesis of Nanostructured Metal Oxide Materials and Their Applications in Li-ion Batteries and Supercapacitors

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Synthesis of Nanostructured Metal Oxide Materials and Their ...

中国化学会第29届学术年会

作者： xiong wen（david） lou School of Chemical and Biomedical Engineering Nanyang Technological University

Metal oxides are suggested as promising electrode materials for lithium-ion batteries（LIBs） and supercapacitors. We have employed hydrothermal/solvothermal methods to synthesize a wide range of new metal oxide based nanomaterials, and investigated their potential applications as electrode materials for LIBs and supercapacitors. In this talk, I will briefly discuss three types of metal oxides based on three different lithium storage mechanisms.（i） Specifically, we have synthesized hollow SnO2 nanostructures by both templating and template-free methods, and further engineered them into SnO2-carbon composite hollow structures to achieve significantly improved lithium storage properties.（ii） We also try to improve the lithium insertion properties of TiO2 by engineering the crystal facets in view of the fact that lithium insertion in TiO2 is anisotropic. In particular, anatase TiO2 in the form of nanosheet with exposed（001） facets is an ideal host structure for this purpose.（iii） We have also demonstrated the concept for conversion reaction compounds（e.g., Fe2O3） showing that the cycling performance can be improved by creating a porous/hollow structure. Lastly, I will briefly talk about some of our most recent works about mixed metal oxide materials for LIBs and supercapacitors.

关键词： Metal Oxide Hollow Structures Lithium ion batteries Supercapacitors

Synthesis of Hollow Nanostructures for Electrochemical Energy Storage

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Synthesis of Hollow Nanostructures for Electrochemical Energ...

第31届全国化学与物理电源学术年会

作者： xiong wen(david)lou School of Chemical and Biomedical Engineering Nanyang Technological University

Hollow nanostructures are promising as electrode materials for electrochemical energy storage,including lithium-ion batteries,supercapacitors and lithium-sulfur *** have employed hydrothermal/solvothermal methods to synthesize hollow nanostructures of different metal oxide/sulfide materials,and investigated their electrochemical properties in lithium-ion batteries and *** this talk,I will briefly discuss the synthesis and electrochemical properties of hollow nanostructures of metal oxides/*** have been able to synthesize different hollow nanostructures of many binary metal oxides such as SnO,FeO and FeO,and more recently mixed transition metal oxides/sulfides such as NiCoO and *** also designed some hollow structures of carbon and carbon-metal oxide for lithium sulfur batteries.

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Synthesis of Hollow Nanostructues for Lithium-ion Batteries

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Synthesis of Hollow Nanostructues for Lithium-ion Batteries

中国化学会第29届学术年会

作者： xiong wen（david）lou School of Chemical and Biomedical Engineering Nanyang Technological University

Hollow nanostructures are promising as electrode materials for lithium-ion batteries（LIBs）. We have employed hydrothermal/solvothermal methods to synthesize hollow nanostructures of different materials, and investigated their lithium storage properties. In this talk, I will briefly discuss hollow nanostructures of metal oxides. We have been able to synthesize different hollow nanostructures of many binary metal oxides such as SnO2, Fe2O3 and Fe3O4, and more recently mixed metal oxides. I will also talk about integration of oxide and different carbon materials to further improve their lithium storage properties.

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二硫化钼纳米片复合材料的制备及其锂离子存储性能

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二硫化钼纳米片复合材料的制备及其锂离子存储性能

中国化学会第28届学术年会

作者：张东阳丁书江 xiong wen(david)lou 西安交通大学理学院应用化学系 School of Chemical and Biomedical Engineering Nanyang Technological University

＜正＞在聚苯乙烯微球的辅助下,合成了聚苯乙烯微球和二硫化钼（MoS2）纳米片微球的混合物,在惰性气体保护下,经过高温煅烧的过程,聚苯乙烯微球被分解了,只得到由MoS2纳米片构成的微球。我们对这些

关键词：二硫化钼纳米片微球碳纳米管锂离子电池

Oxidation behavior of high Hf nickel-based superalloy in air at 900, 1000 and 1100℃

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International Journal of Minerals,Metallurgy and Materials 2021年第12期28卷 1957-1965页

作者： Jiu-han Xiao Ying xiong Li Wang Xiang-wei Jiang Dong Wang Kai-wen Li Jia-sheng Dong Lang-hong lou Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China China National South Aviation Industry Company Limited Zhuzhou 412002China

To investigate the oxidation behavior of a nickel-based superalloy with high hafnium content(1.34 wt%),this study performed isothermal oxidation tests at 900,1000,and 1100℃for up to 200 h.X-ray diffraction and scanning electron microscopy with energy-dispersive X-ray spectroscopy were applied to study the oxidation *** weight gain of the high Hf nickel-based superalloy exhibited a parabolalike curve,and no spallation of the oxide scale was observed during the oxidation *** alloy presented excellent oxidation resistance,and no HfO_(2) was observed in the oxide scale at 900℃.With the increase of the oxidation temperature to 1000℃,HfO_(2) particles formed in the spinel phases of the scale,and"peg-like"HfO_(2) was observed within and beneath the inner layer of Al2O_(3) after *** the oxidation temperature rose to 1100℃,"peg-like"HfO_(2) was observed at the early stage of the oxidation test(within 25 h).The formation mechanism of HfO_(2) and its impact on oxidation resistance were investigated based on the analysis of the oxidation test results at different temperatures.

关键词： superalloy resistance alloy

Liquid-liquid phase separation in biology: mechanisms,physiological functions and human diseases

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Science China(Life Sciences) 2020年第7期63卷 953-985页

作者： Hong Zhang xiong Ji Pilong Li Cong Liu Jizhong lou Zheng Wang wenyu wen Yue Xiao Mingjie Zhang Xueliang Zhu National Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Cell Proliferation and Differentiation of the Ministry of Education School of Life SciencesPeking-Tsinghua Center for Life SciencesPeking UniversityBeijing 100871China Beijing Advanced Innovation Center for Structural Biology Beijing Frontier Research Center for Biological StructureTsinghua-Peking Joint Center for Life SciencesSchool of Life SciencesTsinghua UniversityBeijing 100084China Interdisciplinary Research Center on Biology and Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 201210China Key Laboratory of RNA Biology CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Institutes of Biomedical SciencesSchool of Basic Medical SciencesFudan UniversityShanghai 200032China State Key Laboratory of Cell Biology CAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesShanghai 200031China Division of Life Science State Key Laboratory of Molecular NeuroscienceHong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

Cells are compartmentalized by numerous membrane-enclosed organelles and membraneless compartments to ensure that a wide variety of cellular activities occur in a spatially and temporally controlled manner. The molecular mechanisms underlying the dynamics of membrane-bound organelles, such as their fusion and fission, vesicle-mediated trafficking and membrane contactmediated inter-organelle interactions, have been extensively characterized. However, the molecular details of the assembly and functions of membraneless compartments remain elusive. Mounting evidence has emerged recently that a large number of membraneless compartments, collectively called biomacromolecular condensates, are assembled via liquid-liquid phase separation(LLPS). Phase-separated condensates participate in various biological activities, including higher-order chromatin organization,gene expression, triage of misfolded or unwanted proteins for autophagic degradation, assembly of signaling clusters and actin-and microtubule-based cytoskeletal networks, asymmetric segregations of cell fate determinants and formation of pre-and post-synaptic density signaling assemblies. Biomacromolecular condensates can transition into different material states such as gel-like structures and solid aggregates. The material properties of condensates are crucial for fulfilment of their distinct functions, such as biochemical reaction centers, signaling hubs and supporting architectures. Cells have evolved multiple mechanisms to ensure that biomacromolecular condensates are assembled and disassembled in a tightly controlled manner. Aberrant phase separation and transition are causatively associated with a variety of human diseases such as neurodegenerative diseases and cancers. This review summarizes recent major progress in elucidating the roles of LLPS in various biological pathways and diseases.

关键词： phase separation phase transition transcription asymmetric division postsynaptic density autophagy

Excellent photothermal conversion of core/shell CdSe/ Bi2Se3 quantum dots

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Nano Research 2015年第5期8卷 1443-1453页

作者： Guo Zhi Jia wen Kai lou Fang Cheng xiong Long Wang Jiang Hong Yao Ning Dai Hai Qing Lin Kai Chang Institute of Semiconductors Chinese Academy of Sciences P.O. Box 912 Beijing 100083 China Tianjin Chengjian University Tianjin 300384 China Department of Physics and Electronic Science Changsha University of Science and Technology Changsha 410004 China Key Laboratory of Weak-Light Nonlinear Photonics Ministry of Education School of Physics and TEDA Appfied Physics School Nankai University Tianjin 300457 China The National Laboratory for Infrared Physics the Shanghai Institute of Technical Physics of the Chinese Academy of Sciences Shanghai 200083 China Beijing ComputationalScience Research Center Beijing 100084 China

Water-dispersed CdSe/Bi2Se3 core/shell QDs with a photothermal conversion coefficient of 27.09% have been synthesized by a cation exchange reaction. The microstructure and crystal structure of the QDs, which were confirmed by TEM and XRD, showed that partial cation exchange occurred inside the CdSe QDs. Two main mechanisms are responsible for the excellent photothermal conversion： inhibition of radiative recombination of carriers due to the formation of type-II semiconductor heterostructures, and the large surface-to-volume ratio of the QDs. Photothermal conversion experiments indicated that the CdSe/Bi2Se3 QDs showed high photothermal conversion efficiency and excellent NIR photostability.

关键词： cation exchange quantum dots photothermal type-II heterostructure CdSe/Bi2Se3