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Recent progress in Li-ion batteries with TiO_(2) nanotube anodes grown by electrochemical anodization

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Rare Metals 2021年第2期40卷 249-271页

作者： meng-meng zhang Jia-Yuan Chen Hui Li Chun-Rui Wang College of Science and Shanghai Institute of Intelligent Electronics and Systems Donghua UniversityShanghai201620China

Self-organized titanium dioxide(TiO_(2))nanotubes,which are prepared by electrochemical anodizing,have been widely researched as promising anodes for Liion *** nanotubular morphology and bulk structure of TiO_(2)nanotubes can be easily changed by adjusting the anodizing and annealing *** is provided to investigate different phenomena by selectively adjusting a specific parameter of the Li^(+)insertion *** this paper,we reviewed how the morphology and crystallography of TiO_(2)nano tubes influence the electrochemical performance of Li^(+)*** particular,electrochemical performances of amorphous and anatase titanium dioxide nanotube anodes were compared in *** we all know,TiO_(2)nanotube anodes have the advantages of nontoxicity,good stability,high safety and large specific surface area,in lithium-ion ***,they suffer from poor electronic conductivity,inferior ion diffusivity and low theoretical capacity(335 mAh·g^(-1)),which limit their practical ***,there are two ways to overcome the shortcomings of titanium dioxide nanotube anodes,including doping and synthesis *** achievements and existing problems associated with doped TiO_(2)nanotube anodes and composite material anodes are summarized in the present *** on the analysis of lithium insertion mechanism of titanium dioxide nanotube electrodes,the prospects and possible research directions of TiO_(2)anodes in lithiumion batteries are discussed.

关键词： Electrochemical anodization TiO_(2)nanotubes Anodes Li-ion batteries

An experiment study of vortex induced vibration of a steel catenary riser under steady current

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Journal of Hydrodynamics 2020年第5期32卷 834-844页

作者： Tie Ren Yu-wang Xu Jungao Wang Hao-jie Ren meng-meng zhang Shi-xiao Fu Yao-song Chen State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Centre for Advanced Ship and Deep-Sea Exploration Shanghai 200240China Marine Design and Research Institute of China Shanghai 200011China Norweigian Public Road Administration StavangerNorway

The vortex induced vibration(VIV)of marine risers has been investigated by many researchers in experimental studies of a straight flexible riser model as well as a rigid cylinder to reveal the dynamic response characteristic and the mechanics behind ***,due to the limitation of experimental apparatus,very few studies are about the VIV of a steel catenary riser(SCR)which is with a complex *** investigate the VTV features and to further develop the corresponding numerical predictions of a SCR under steady current,a large-scale model test of a SCR was towed in an ocean basin at various *** Bragg grating strain sensors are instrumented on the riser model to measure both in-plane and out-of-plane *** characteristics of oscillating amplitude and dominating frequency response,the phenomenon of mode competition and travelling wave and the fatigue damage of the steel catenary riser in inline and cross-flow direction under steady current are analyzed.

关键词： Vortex induced vibration(VTV) steel catenary riser(SCR) experimental study

Size-controllable synthesis and high-performance formic acid oxidation of polycrystalline Pd nanoparticles

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Rare Metals 2019年第2期38卷 115-121页

作者： Hui-Hui Wang Jin-Feng zhang Ze-Lin Chen meng-meng zhang Xiao-Peng Han Cheng Zhong Yi-Da Deng Wen-Bin Hu Tianjin Key Laboratory of Composites and Functional Materials and Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education) Tianjin University

A facile approach was developed for the synthesis of polycrystalline palladium nanoparticles(Pd NPs)by using tannic acid(TA) as green reagent and stabilizer in a 30 ℃ water bath. The size of Pd NPs can be tuned in a range of 10–60 nm simply by adjusting the concentration of Pd precursor. The catalytic activity and stability of the as-obtained Pd NPs toward formic acid oxidation were analyzed. It is found that these Pd NPs with different sizes exhibit size-dependent and enhanced formic acid oxidation performance compared to the commercial Pd black catalyst. It should be noted that the Pd catalysts with an average size of 24 nm demonstrate the best catalytic activity and stability among the other prepared Pd NPs, which can be ascribed to its larger electrochemical surface area(ECSA)and polycrystalline structure with defects.

关键词： Polycrystalline palladium nanoparticle Size controllable Tannic acid: Room temperature Formic acid oxidation

Gold nanoparticles/carbon nanotubes composite microspheres for catalytic reduction of 4-nitrophenol

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Chinese Chemical Letters 2016年第6期27卷 843-846页

作者： Sheng Liu Xiao-Lin Zhou meng-meng zhang Xuan Lu Yu-Jun Qin Pu zhang Zhi-Xin Guo Department of Chemistry Renmin University of China

The layer-by-layer assembly of polyethyleneimine and carbon nanotubes is carried out through the electrostatic interactions on colloidal polystyrene templates. The successful spherical growth of polyethyleneimine/carbon nanotube multilayers could be investigated by SEM. The subsequent in situ preparation and deposition of gold nanoparticles on the core–shell composites could yield novel microsphere complexes, which are characterized by SEM, TEM, EDX and XRD. The functional hierarchical microspheres with gold nanoparticles exhibit good catalytic activity in the reaction of reducing 4-nitrophenol to 4-aminophenol.

关键词： Carbon nanotubes Gold nanoparticles Microsphere Catalytic activity

The fabrication of flower-like graphene/octadecylamine composites

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Chinese Chemical Letters 2015年第9期26卷 1144-1146页

作者： Yao Chen Xin-Wei Dou meng-meng zhang Xuan Lu Yu-Jun Qin Pu zhang Zhi-Xin Guo Department of Chemistry Renmin University of China

Three-dimensional flower-like nanomaterials have wide application due to the large specific surface *** this letter,the morphology of octadecylamine（ODA） from several common solvents is studied and it is found that from the chloroform and acetone solution,ODA assembles into petal-like structure,which further forms the spherical or flower-like ***,the composite materials incorporated reduced graphene oxide（rGO） and ODA could well keep the flower-shaped structure of *** results show that the introduction of graphene has little influence on the structure of ODA and contact angle test indicates good hydrophobic performance of the rGO/ODA material.

关键词： Graphene Octadecylamine Flower-like Composite

Modulating p-d orbital hybridization by CuO/Cu nanoparticles enables carbon nanofibers high cycling stability as anode for sodium storage

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Rare Metals 2023年第12期42卷 4039-4047页

作者： Zhi-Jia zhang He-Yi Sun Yue-Fang Chen Yu-Wen Zhao meng-meng zhang Chun-Sheng Li Yan Sun Zhong-Hui Gao Hui-Jun Li Yong Jiang School of Materials Science and Engineering Institute of Quantum Materials and DevicesState Key Laboratory of Separation Membrane and Membrane ProcessesTiangong UniversityTianjin 300387China School of Chemistry and Life Sciences School of Materials Science&Engineeringthe Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaSuzhou University of Science and TechnologySuzhou 215009China School of Materials Science&Engineering The Key Laboratory of Advanced Ceramics and Machining Technology By the Ministry of Education of ChinaTianjin UniversityTianjin 300072China Faculty of Engineering and Information Sciences University of WollongongWollongongNSW 2522Australia

Carbon nanofibers(CNFs)have been extensively studied as anode materials for sodium-ion batteries due to their high conductivity,large aspect ratio and good electrochemical *** low specific capacity and low first cycle efficiency of CNFs,however,have hindered its practical ***,we present a facile strategy to synthesize a novel CNFs decorated with Cu/CuO nanoparticles(Cu-CNFs)using magnetron sputtering ***/CuO nanoparticles were uniformly distributed on the surface of *** to the density functional theory(DFT)calculation,Cu/CuO nanoparticles d-orbitals and CNFs p-orbitals present hybridization states,and the Na~+adsorption energy of the modified CNFs decreases from-2.14 to-2.97 *** Cu-CNFs composites exhibit excellent sodium storage properties,presenting a desirable initial Coulombic efficiency of 76%and a high specific reversible capacity of 300 mAh·g^(-1)at 0.1 A·g^(-1)after 400 ***-CNFs anode has excellent cycling stability under high current density,maintaining a high capacity of 150 mAh·g^(-1)at 1 A·g^(-1)after 6000 *** magnetron sputtering to regulate the electronic structure provides a new thought for improving the electrochemical performance of carbon materials.

关键词： Carbon nanofibers Cu/CuO nanoparticles Orbital hybridization Magnetron sputtering Density functional theory calculation

Strengthened graphene oxide/diazoresin multilayer composites from layer-by-layer assembly and cross-linking

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Chinese Chemical Letters 2015年第9期26卷 1155-1157页

作者： Xian-He Huang meng-meng zhang Xin-Wei Dou Xuan Lu Yu-Jun Qin Pu zhang Jia-Hua Shi Zhi-Xin Guo Department of Chemistry Renmin University of China Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province Institute of Fine Chemical and EngineeringHenan University

The layer-by-layer assembly of graphene oxide and diazoresin is carried out via the electrostatic and hydrogen bond interactions on planar substrates and colloidal *** successful planar and spherical growth of multilayer could be investigated by UV-vis spectrophotometry and scanning electron microscopy,*** UV irradiation or heating would convert the ionic bonds and hydrogen bonds to covalent bands,which significantly improves the stability of the multilayer composite against solvent *** the cross-linked core-shell composites,the template cores could be removed by dissolution and hollow microspheres are obtained.

关键词： Graphene oxide Diazoresin Layer-by-layer assembly Cross-linking

Optimized valence state of Co and Ni in high-entropy alloy for high active-stable OER

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Rare Metals 2023年第11期42卷 3607-3613页

作者： Zhi-Jia zhang Jun-Peng Guo Shi-Hao Sun Qi Sun Yu-Wen Zhao Yi-Fang zhang Zhen-Yang Yu Chun-Sheng Li Yan Sun meng-meng zhang Yong Jiang School of Materials Science and Engineering State Key Laboratory of Separation Membrane and Membrane ProcessesTiangong UniversityTianjin300387China School of Electronic and Information Engineering Institute of Quantum Materials and DevicesTiangong UniversityTianjin300387China School of Mechanical Engineering Tiangong UniversityTianjin300387China School of Chemistry and Life Sciences Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of ChinaSuzhou University of Science and TechnologySuzhou215009China

High entropy alloy(HEA)exhibits potential water-splitting properties but are limited by the high energy consumption from ***,the complex atomic distribution endows the electronic structure regulation of HEA to remain ***,the nanoporous NiCuMnCoFe(np-NCMCF)HEA was prepared by the high-energy ball milling coupled with de-alloying *** introduced Fe markedly increases the proportion of Ni^(3+)and Co^(3+).

关键词： alloy alloying entropy

Copolymers with fluorescence properties in mesoporous silica SBA-15:Synthesis and characterization

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Chinese Chemical Letters 2014年第12期25卷 1620-1624页

作者： Li-Ping Wang Guang Li Wen-Zhi Li Chao-Lei Ban Yu-Chao Li Cong Guo meng-meng zhang Ling-Yun Liu Na-Na Lu meng-Zhu Zheng College of Materials Science and Engineering Liaocheng University

A novel copolymer with fluorescence properties in mesoporous silica SBA-15 was prepared via a combination of surface-initiated reversible addition-fragmentation chain transfer（RAFT） polymerization and ＂click＂ chemistry.A sufficient amount of peroxide groups were introduced into mesoporous silica SBA-15 channel pores and were further used to initiate the RAFT polymerization of styrene and 4-vinylbenzyl azide,resulting in SBA-15 supported polystyrene-co-poly（4-vinylbenzyl azide） copolymer（PS-co-PVBA/SBA-15） hybrid *** samples were characterized by Fourier transform infrared spectroscopy（FT-IR）,transmission electron microscopy（TEM）,thermogravimetry analysis（TGA）,N_2 adsorption-desorption isotherms and X-ray diffraction（XRD）,*** results show that the styrene and 4-vinylbenzyl azide had copolymerized inside mesoporous silica ***,Npropargyl-carbazole（PC） was connected to PS-co-PVBA/SBA-15 hybrid material via ＂click＂ reaction,resulting in PS-co-PVBC/SBA-15 with carbazole side groups hybrid *** fluorescence spectrum is dominated by a broad band from 350 nm to 400 nm in narrow region and the maximum peak is 362 nm,indicating the characteristic absorption of the carbazole group of PS-co-PVBC/SBA-15 hybrid material.

关键词： SBA-15 RAFT "Click" chemistry Fluorescence properties