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Chinese Chemical Letters 2021年第11期32卷 3307-3321页

作者： Chengqian Cui guodong li Zhiyong tang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China

Metal-organic framework nanosheets(MONs)as the emerging materials have been attracting great interest because the nanosheets possess a range of fascinating attributes including high surface areas and sufficient accessible active sites,and their nanoscale thicknesses are favorable for mass diffusion and transfer of substrates and products with respect to bulk metal-organic frameworks(MOFs).This review first summarizes the synthetic methods of various MONs from top-down and bottom-up methods as well as their diverse composites with different ***,the catalytic applications of MON based nanocatalysts are discussed and the relationships among the composition,structure and catalytic performances are ***,the challenges and future outlook about the synthesis of diverse MONs and their composites for heterogeneous catalysis are prospected.

关键词： Metal-organic framework nanosheet Top-down synthesis Bottom-up synthesis Composite structure Heterogeneous catalysis

Effects of baffie and intraocular pressure on aerosols generated in the noncontact tonometer measurement during COVID-19

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International Journal of Ophthalmology(English edition) 2022年第4期15卷 533-540页

作者： Yuan tang Yan-Yan Chen Chun-Chun li Zhang-Yan Chen Chen Chen Si-Qi Wen Xiao-Qiong Huang Jia Qu Yan-Miao Chen ai-ai Chen The Eye Hospital Wenzhou Medical UniversityWenzhou 325000Zhejiang ProvinceChina The Affiliated Ningbo Eye Hospital of Wenzhou Medical University Ningbo 315000Zhejiang ProvinceChina

aiM: To investigate the effects of baffle and intraocular pressure(IOP) on the aerosols generated in the noncontact tonometer(NCT) measurement and provide recommendations for the standardized use of the NCT during coronavirus disease 2019(COVID-19). METHODS: This clinical trial included 252 subjects(312 eyes) in The Eye Hospital, Wenzhou Medical University from March 7, 2020, to March 28, 2020. Sixty subjects(120 eyes) with normal IOP were divided into two groups. One group used an NCT without a baffle, another group used an NCT with a baffle. Another 192 subjects(192 eyes) were divided into four groups: group A;(without a baffle+normal IOP), group A;(without a baffle+high IOP), group B;(with a baffle+normal IOP) and group B;(with a baffle+high IOP). Particulate matter(PM) 2.5 and PM10 generated by all subjects were quantified during the NCT measurement. The IOP values were recorded simultaneously. Effects of baffle and IOP on aerosols generated during the NCT measurement were ***: In the normal eye group with a baffle, the aerosol density decreased in a wave-like shape near the NCT with the increase in the number of people measured for IOP, demonstrating no cumulative effect. However, in the normal eye group without a baffle, there was a cumulative effect. PM2.5 and PM10 in group A;were higher than group A;(both Pgroup B;were higher than group B;(Pgroup B;was lower than group A;(Pgroup B;were lower than group A;(Pgroup A;+A;were 0.80 and 1.10 μg/m;respectively, which were higher than 0.20 and 0.60 μg/m;in the combined group B;+B;(both Pgroup A;+B;were 0.10 and 0.20 μg/m;respectively, which were lower than 1.30 and 1.70 μg/m;in the combined group A;+B;(both Pgenerated in patients with high IOP. Af

关键词： noncontact tonometry aerosol baffle intraocular pressure coronavirus disease 2019

Advanced architecture designs towards high-performance 3D microbatteries

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Nano Materials Science 2021年第2期3卷 140-153页

作者： Yang li Jiang Qu Fei li Zhe Qu Hongmei tang lixiang liu Minshen Zhu Oliver g.Schmidt Material Systems for Nanoelectronics Chemnitz University of Technology09107 ChemnitzGermany Institute for Integrative Nanosciences Leibniz IFW Dresden01069 DresdenGermany Center for Materials Architectures and Integration of Nanomembranes(MAIN)Chemnitz University of Technology09126 ChemnitzGermany School of Science Dresden University of TechnologyDresden01062Germany

Rechargeable microbatteries are important power supplies for microelectronic *** essential targets for rechargeable microbatteries are high output energy and minimal footprint *** addition to the development of new high-performance electrode materials,the device configurations of microbatteries also play an important role in enhancing the output energy and miniaturizing the footprint *** make a clear vision on the design principle of rechargeable microbatteries,we firstly summarize the typical configurations of *** advantages of different configurations are thoroughly discussed from the aspects of fabrication technologies and material *** the high energy output at a minimal footprint area,a revolutionary design for microbatteries is of great *** this perspective,we review the progress of fabricating microbatteries based on the rolled-up nanotechnology,a derivative origami ***,we discussed the challenges and perspectives in the device design and materials optimization.

关键词： Microbatteries Origami technologies Rolled-up nanotechnology 3D devices Energy storage performance

Non-Flat Bisbenzylisoquinoline Alkaloid Fangchinoline As a Class of Potent g-Quadruplex Stabilizer with Anti-cancer Activity

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Chinese Journal of Chemistry 2015年第9期33卷 1041-1048页

作者： Qian li Junfeng Xiang Yalin tang Beijing National Laboratory for Molecular Sciences (BNLMS) Center for Molecular SciencesState Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of Chemistry Chinese Aeademy of Sciences Beijing 100190 China

Compounds selectively binding and stabilizing g-quadruplex structures could inhibit the telomerase or down- regulate the oncogenes and may act as anti-cancer drugs. An alkaloid with non-flat structure, fangchinoline, showed to strongly stabilize the intermolecular and intramolecular parallel stranded g-quadruplex structure, increasing melting temperature by 20 and 23℃, respectively. The binding mode was investigated by using NMR and molec- ular modelling methods. Four human cell lines （HL-60, BgC-823, Be1-7402 and KB） were taken to test the an- ti-proliferation effects of fangchinoline and the IC50 values were ranged from 16 to 32 μmol/L. These results showed that the fangchinoline or related moiety derivatives may represent a class of telomere-targeted agents as po- tential anti-cancer drugs.

关键词： g-quadruplex alkaloid non-flat anti-cancer drug

An improved branching algorithm for the proper interval edge deletion problem

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Frontiers of Computer Science 2022年第2期16卷 178-180页

作者： Wenjun li Xiaojing tang Yongjie YANg School of Computer and Communication Engineering Hunan Provincial Key Laboratory of Intelligent Processing of Big Data on TransportationChangsha University of Science and TechnologyChangsha 410015China School of Computer Science and Engineering Central South UniversityChangsha 410083China

1 Introduction For a graph class g,the g-EDgE DELETION problem is to determine whether a given graph can be transformed into a graph in g by deleting at most k *** g-EDgE DELETION problem for a large body of graph cla... 详细信息

关键词： branching problem transformed

Preparation of Pt–gO composites with high-number-density Pt nanoparticles dispersed uniformly on gO nanosheets

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Progress in Natural Science:Materials International 2016年第2期26卷 139-144页

作者： Nanting li Shaochun tang Xiangkang Meng Institute of Materials Engineering National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences Nanjing University

Pt–gO composites with high-number-density Pt nanoparticles dispersed uniformly on gO nanosheets were prepared using ethylene glycol as reducer at 180 °C. The nanoparticles had an average size of 12 nm with corners and edges on their surfaces. The composites had electrochemically active surface area of 31.7 m2g-1with a ratio（I_f/Ir=0.96） of the forward anodic peak current（I_f） to the reverse anodic peak current（Ir） in cyclic voltammetry curves, which is much higher than those of the reported Pt nanodendrites/reduced graphene oxide composites.

关键词： graphene Platinum nanoparticles Formic acid electro-oxidation

Synthesis, Crystal Structure and Characterization of a One-dimensional Supramolecular Rare Earth Complex of N-(6-(4-Methylpyridinyl))ketoacetamide

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Chinese Journal of Structural Chemistry 2007年第8期26卷 877-882页

作者： XU li tang Kuan-Zhen MA Yu-Fei tang Yu TAN Min-Yu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China

A one-dimensional （1D） supramolecular rare earth complex [Nd（NO3）2L2-（C3H6O）][NdL（NO3）4]} （L=N-（6-（4-methylpyridinyl））ketoacetamide） has been prepared and characterized by elemental analysis, IR and electronic spectroscopy, and single-crystal X-ray diffraction. The crystal crystallizes in the triclinic system, space group P1^- with a=0.9146（6）, b=1.2581（8）, c=2.2316（14） nm, α=99.352（10）,β=97.209（9）, γ=103.935（9）°, V=2.422（3） nm3, Dc=1.776 g/cm^3, C33H42N12Nd2O25, Mr=1295.27, Z=2, F（000）=1288, μ=2.217 mm-1, R=0.0508and wR=0.1046 for 5173 observed reflections （I 〉 2σ（I））. In the structure of the title complex,one-dimensional supramolecular double-chains are formed by intermolecular hydrogen bonding interactions.

关键词： crystal structure rare earth nitrate β-diketone complex supramolecular network

Phase Stability,Elastic,Thermo-physical and Electronic Properties of Hexa-(Mo,Cr,W)_2C from First-principles Calculations

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Journal of Iron and Steel Research International 2016年第10期23卷 1096-1103页

作者： Di WU Wan-tang FU Yong li Chun-xu WANg Jing-lin tang College of Mechanical Engineering Yanshan University Institute for Structural Materials Central Iron and Steel Research Institute State Key Laboratory of Metastable Materials Science and Technology Yanshan University

Phase stability,elastic properties,thermo-physical properties,as well as electronic properties of hexa-（Mo,Cr,W）2C carbides were investigated by first-principles *** results indicated that the Mo8C4,Mo7Cr1C4,Mo7W1C4,Mo6W2C4,and Mo6W1Cr1C4 are stable and the stability follows the sequence：Mo6W1Cr1C4〉Mo7W1C4〉Mo7Cr1C4〉 Mo6W2C4〉 ***6W1Cr1C4 shows the highest stability,deformation resistance and hardness.g/B（shear modulus/bulk modulus）and Poisson′s ratio of the stable hexa-（Mo,Cr,W）2C are all larger than 1.75 and 0.26,respectively,which indicates that they are all *** anisotropies are mainly due to the different Vogit shear modulus/Reuss shear modulus;the mechanical anisotropy of Mo7Cr1C4 is the largest,and that of Mo8C4 is the ***,the obtained Debye temperatureΘDand heat capacity Cpindicate that Mo6W2C4 possesses the best thermal conductivity（ΘD=497.72K）,while Mo7Cr1C4 and Mo6W2C4possess the largest heat capacity when the temperature is in the range of 0-10 Kand larger than 10 K,*** the electronic property analysis,the doped Cr and W atoms can not only participate in orbitals hybridization themselves but also enhance the orbitals hybridization between Mo and C atoms,which can reinforce the interatomic interactions.

关键词： hexa (Mo,Cr, W)2C carbide elastic property electronic structure thermo-physical property first-principles calculation

Corrosion behavior and failure mechanism of SiC whisker and c-AlPO_(4) particle-modified novel tri-layer Yb_(2)Si_(2)O_(7)/mullite/SiC coating in burner rig tests

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Journal of Advanced Ceramics 2022年第12期11卷 1901-1917页

作者： Pengju CHEN Peng XIAO Xian tang Yang li School of Nuclear Science and Technology University of South ChinaHengyang 421001China Powder Metallurgy Research Institute Central South UniversityChangsha 410083China National Key Laboratory of Science and Technology on High-strength Structural Materials Central South UniversityChangsha 410083China

The corrosion behavior of environmental barrier coatings(EBCs)directly affects the service life and stability of ceramic matrix composite(CMC)structural parts in the *** silicon carbide(SiC)whisker toughening phase and c-AlPO_(4) bonding phase are firstly used to improve the service life of novel tri-layer Yb_(2)Si_(2)O_(7)/mullite/SiC EBCs in the burner rig *** formation of penetrating cracks in Yb_(2)Si_(2)O_(7)/mullite/SiC coating caused the failure of coating at 1673 *** SiC whiskers in mullite middle coating significantly inhibited the formation of penetrating cracks in Yb_(2)Si_(2)O_(7)/mullite/SiC coating,and efficiently prevented the oxidation of carbon fiber reinforced silicon carbide(C_(f)/SiC)samples for 360-min thermal cycles(24 times)with a weight loss of 6.19×10^(−3) g·cm^(−2).Although c-AlPO_(4) particles further improved the service life of SiC_(w)-mullite(SM)coating,the overflow of PO_(x) gas aggravated the formation and expansion of cracks in the Yb_(2)Si_(2)O_(7) outer coating,and caused the service life of overall Yb_(2)Si_(2)O_(7)/c-AlPO_(4)-SiC_(w)-mullite(ASM)/SiC coating to be slightly lower than that of Yb_(2)Si_(2)O_(7)/SM/SiC *** study guides the design of modified tri-layer EBCs with long service life in high-temperature and high-speed gas environment.

关键词： Yb_(2)Si_(2)O_(7) mullite tri-layer sol-gel burner rig test

Pressure relief-dipping-microwave assisted polymerization of melamine-L-aspartic acid resin at activated carbon for purification of L-threonine fermented crude product

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Chinese Journal of Chemical Engineering 2018年第10期26卷 2034-2039页

作者： Bin li Wenshuai tang aiguo Yuan guanping Jin Anhui Key Lab of Controllable Chemical Reaction &Material Chemical Engineering School of Chemistry and Chemical Engineering Hefei University of Technology Hefei 230009 China Shantou CityJiahe Biologic Technology Co. Ltd. Shantou 515021 China

L-threonine(L-Thr) obtained by fermentation often contains vestigial hydrosoluble Pb(Ⅱ), Fe(Ⅱ), L-glutamic acid(L-glu) etc., which affect the product quality. Poly melamine and L-aspartic acid(L-Asp) resin functional coconut shell activated carbon composite(PMA/AC) was prepared by a pressure relief-dipping-microwave assisted polymerization method for the simultaneous removals. The adsorption capacities of Pb(Ⅱ), Fe(Ⅱ) and L-glu could reach to 82.34 mg·g^(-1), 57.82 mg·g^(-1) and 102.58 mg·g^(-1) at conditions of pH 5.0, 45 °C and 4 h with an initial concentration of 0.01 mol·L^(-1), respectively. The present PMA/AC was successfully used to the simultaneous removals of vestigial Pb(Ⅱ), Fe(Ⅱ) and L-glu from the fermented crude product solution of L-Thr. Moreover, the PMA/AC was carefully characterized by FE-SEM, IR et al. analysis techniques, the results show that abundant PMA particles evenly distributed at the inner and outside surface of AC with a size of(50 ± 20) nm.

关键词： L-Threonine fermented crude product Simultaneous removals Activated carbon composites Absorption