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Structure and electrochemical properties for the MoxV3−xO7/MWNTs nanocomposites

IOP Conference Series: materials Science and Engineering 2011年第8期18卷

作者： Quanyao Zhu Siping Hu Wei Jin Hao Wen Wen Chen Galina Zakharova State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan 430070 People's Republic of China Institute of Solid State Chemistry of the Ural Branch Russian Academy of Science Pervomaiskaya 91 Yekaterinburg 620990 Russia

The MoxV3−xO7/MWNTs nanocomposites were fabricated via a hydrothermal reaction followed by self-assembling process. The nanocomposites were characterized in terms of surface morphology and structure by FESEM, TEM, XRD and XPS analysis, respectively. The electrochemical behaviors of the nanocomposites were investigated by galvanostatic charge-discharge test and cyclic voltammetry. The results showed that MoxV3−xO7/MWNTs nanocomposites had great cycleability as well as capacity characteristics, which was 277.4 mAh/g in the first discharge process and remained 207.9 mAh/g after fiftieth discharge cycle. In the rapid charge-discharge test, the capacity rate still remained 88.6 % after twentieth cycles at 1.2 C discharge.

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Observation of the out-of-plane polarized spin current from CVD grown WTe2

arXiv

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arXiv 2021年

作者： Shi, Shuyuan Li, Jie Hsu, Chuang-Han Lee, Kyusup Wang, Yi Yang, Li Wang, Junyong Wang, Qisheng Wu, Hao Zhang, Wenfeng Eda, Goki Liang, Gengchiau Chang, Haixin Yang, Hyunsoo Department of Electrical and Computer Engineering National University of Singapore 117576 Singapore Quantum-Nano Matter and Device Lab State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Institute of Physics Academia Sinica Taipei11529 Taiwan Key Laboratory of Materials Modification by Laser Ion and Electron Beams Ministry of Education Dalian University of Technology Dalian116024 China Centre for Advanced 2D Materials National University of Singapore 6 Science Drive 2 117546 Singapore Department of Physics National University of Singapore 117542 Singapore

Weyl semimetal Td-phase WTe2 possesses the spin-resolved band structure with strong spin-orbit coupling, holding promises as a useful spin source material. The noncentrosymmetric crystalline structure of Td-WTe2 endows the generation of the out-of-plane polarized spin, which is of great interest in magnetic memory applications. Previously, WTe2 was explored in spin devices based on mechanically exfoliated single crystal flakes with a size of micrometers. For practical spintronics applications, it is highly desirable to implement wafer-scale thin films. In this work, we utilize centimeter-scale chemical vapor deposition (CVD)-grown Td-WTe2 thin films and study the spin current generation by the spin torque ferromagnetic resonance technique. We find the in-plane and out-of-plane spin conductivities of 7.36 × 103 (ħ/2e) (Ωm)–1 and 1.76 × 103 (ħ/2e) (Ωm)–1, respectively, in CVD-growth 5 nm-WTe2. We further demonstrate the current induced magnetization switching in WTe2/NiFe at room temperature in the domain wall motion regime, which may invigorate potential spintronic device innovations based on Weyl semimetals. Copyright © 2021, The Authors. All rights reserved.

关键词： Thin films

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Medical Additive Manufacturing: From a Frontier technology to the Research and Development of Products

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Engineering 2020年第11期6卷 1217-1221页

作者： Guixing Qiu Wenjiang Ding Wei Tian Ling Qin Yu Zhao Lianmeng Zhang Jian Lu Daijie Chen Guangyi Yuan Chengtie Wu Bingheng Lu Ruxu Du Jimin Chen Mo Elbestawi Zhongwei Gu Dichen Li Wei Sun Yuanjin Zhao Jie He Dadi Jin Bin Liu Kai Zhang Jianmo Li Kam WLeong Dewei Zhao Dingjun Hao Yingfang Ao Xuliang Deng Huilin Yang ShaoKeh Hsu Yingqi Chen Long Li Jianping Fan Guohui Nie Yun Chen Hui Zeng Wei Chen Yuxiao Lai Department of Orthopedics Peking Union Medical College HospitalChinese Academy of Medical Science 8 Peking Union Medical CollegeBejjing 100730.China National Engineering Research Center of Light Alloys Net Forming&State Key Laboratony of Metal Matrix Composite Shanghai Jiao Tong UniversityShanghai 200240China Notional Engineering Research Center of Mg Materials and Applicarions and School of Materials Science 8r Engineering.Shanghai Jlao Tong University Shanghai 200240China Department of Spine Surgery Beijing Jishuitan HospitalBeijing 100035China Center for Troanslational Medicine Research and Development Institute of Biomedical and Health EngineeringShenzhen Insitute of Advanced Technology.Chinese Academy of SciencesShenzhen 518055China Guangdong Engineering Laboratony of Biomaterials Additive Manufacturing Guangdong 518055China Musculoskeletal Research Laboratory of the Department of Orthopedics 8 Traumatology and Innovative Orthopedic Biomaterial and Drug Translational Research Laboratory Li Ka Shing Institute of Health SciencesThe Chinese University of Hong KongHong Kong 999077.China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Center for Advanced Structural Materials City University of Hong Kong Shenzhen Research InstiuteShenzhen 518057.China Hong Kong Branch of National Precious Metals Material Engineering Research Center Department of Material Science and EngineeringCity Untiversity of Hong KongHong Kong 999077.China Department of Mechanical Engineering ity Untiversity of Hong Kong.Hong Kong 9977 China School of Pharmacy.Shanghai Jiao Tong University Shanghai 200240China China State Instute of Pharmaceutical Industry Shanghai Institute of Pharmaceutical IndustryShonghai 201203China Shanghai Innovation Instinute for Materials Shanghai 200444.China State Key Laboratory of High-Performance Ceramies and Superfine Microstructure Shanghai Institute of CeramicsChinese Acadermy 0f SciencesShanghai 200050Ch

*** and development(R&D)and the challenges of raw materials for medical additive manufacturing Raw materials for medical additive manufacturing have a wide range of commonalities that are also seen in many other fields,making them an important basis in the field of three-dimensional(3D)*** and challenges related to material types,powder properties,formability,viscoelasticity,and so forth also share common *** example,many metal materials are used in the field of aviation,while metals,polymers,and inorganic materials are used in the field of *** most widely used materials in biomedicine are *** homogeneous and non-homogeneous composites are also availab.e for 3D printing,and impose an additional challenge in additive manufacturing;the use of heterogeneous composites in 3D printing is particularly challenging.

关键词： composites printing additive

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Highly Stable and Reusable Multimodal Zeolite TS‐1 Based Catalysts with Hierarchically Interconnected Three‐Level Micro–Meso–Macroporous Structure†

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Angewandte Chemie 2011年第47期123卷

作者： Li‐Hua Chen Xiao‐Yun Li Ge Tian Yu Li Joanna Claire Rooke Guang‐Shan Zhu Shi‐Lun Qiu Xiao‐Yu Yang Bao‐Lian Su State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Luoshi Road 122 Wuhan 430070 (China) Laboratory of Inorganic Materials Chemistry (CMI) University of Namur (FUNDP) 61 rue de Bruxelles 5000 Namur (Belgium) State Key Laboratory of Inorganic Synthesis & Preparative Chemistry Jilin University 2699 Qianjin Street Changchun 130012 (P. R. China)

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Alloying effect enhanced bimetallic Ni-Fe/TiO 2 catalysts for selective hydrogenation of 1,3-butadiene in the presence of an excess of propylene

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Molecular Catalysis 2023年 550卷

作者： Wei-Hao Wang Bo Jiang Zhao Wang Ya Chen Yao Li Ting-Ting Luo Feng Cheng Bao-Lian Su The State Key Laboratory of Advanced Technology for Material Synthesis and processing Wuhan University of Technology Wuhan 430070 China Center for Materials Research and Analysis Wuhan University of Technology Wuhan 430070 China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium

Nickel is a promising Pd alternative candidate for selective alkynes/alkadienes hydrogenation owing to its high catalytic activity and cheap price, however, with fatal restrictions of low alkenes selectivity and inferior stability caused by its strong olefin adsorption and the cleavage of carbon-carbon bond. Herein, controlled amounts of iron were introduced into nickel as catalytic assistant by deposition-precipitation with urea on TiO 2 support. Using 1,3-butadiene in an excess of propylene to simulate the industrial process, the additional Fe shows a significant enhancement to the catalytic performance of Ni, i.e., Ni-Fe/TiO 2 with Ni/Fe atomic ratio 1:0.33 shows >94% of 1,3-butadiene conversion and >95% of alkenes selectivity after above 200 h of time on stream, superior to that of commercial Pd/Al 2 O 3 catalyst. Further in-situ analysis reveals that the alloying effect from the formation of Ni-rich Ni-Fe intermetallic compound (e.g., Ni 3 Fe alloy) enlarges the distance between two Ni active sites and enriches the electronic density of Ni sites, resulting in a weak adsorption of butenes products for offering such excellent catalytic performance. To the best of our knowledge, this is the first in-depth exploration on supported Ni-Fe bimetallic catalyst for selective hydrogenation of light alkynes/alkadienes. It shows a high potential for replacing the commercial Pd-based catalysts.

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A C156 Molecular Nanocarbon: Planar/Rippled Nanosheets Hybridization

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Angewandte Chemie 2024年第6期137卷

作者： Ruihua Fu Xingyu Chen Fei Qiu Xinyue Liu Prof. Jianlong Xia Prof. Lei Zhang Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Lab of Organic-Inorganic Composites Beijing University of Chemical Technology 100029 Beijing P. R. China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology 430070 Wuhan P. R. China

A novel hybrid nanocarbon consisting of one rippled and two planar nanosheets has been synthesized and characterized. Two meso pairs of [5]helicenes are formed along the long molecular axis of the hybrid to connect rippled and planar subunits, leading to a stable conformation. It is shown that the hybrid possesses the individual electronic properties of the rippled and planar subunits. Compared to the rippled subunit, such hybrid has a better geometric match to C 60 and complexes with C 60 in a 1 : 1 stoichiometry, with the association constant on the order of 10 5 M −1 . The hybrid displays unusual anti -Kasha fluorescence emission. The transient absorption spectroscopy revealed that the singlet fission (SF) from higher level singlet excited states (S n ) is operative in the film of the hybrid.

关键词： nanocarbon hybridization nanosheet supramolecular complexation transient absorption

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Preparation and Oxidation of ZrB2/SiC/Zr2Al4C5 Multi-phase Ceramics with Spark Plasma Sintering

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Journal of Physics: Conference Series 2013年第1期419卷

作者： Qilong Guo Junguo Li Zhiyu Ma Ye Nie Qiang Shen Lianmeng Zhang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 People's Republic of China Sinoma International Engineering CO. Ltd.(Nanjing) 106 Jiangjun avenue Nanjing Jiangsu 211100 China

The ZrB2/SiC/Zr2Al4C5 multi-phase ceramics were fabricated by spark plasma sintering (SPS) at 1800 °C for 3 min under 20 MPa in an vacuum. Oxidation behavior of multi-phase ceramics were investigated using thermo gravimetric analysis (TGA) from 20 °C to 1500 °C and muffle furnace in stagnant air at 1200 °C. Samples were analyzed after oxidation by X-ray diffraction (XRD), scanning electron microscopy (SEM) along with energy dispersive spectroscopy (EDS) to determine the reaction products and to observe the microstructure. The results showed that the aluminium borate and mullite crystallize on the surface in the samples oxidized. The effect of Zr2Al4C5 content on the oxidation resistance of the ZrB2 ceramics were discussed respectively, and oxidation mechanism was also analysised.

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Particle size control of silver nanoparticles prepared by pulsed wire discharge in liquid media

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IOP Conference Series: materials Science and Engineering 2011年第1期20卷

作者： Y Tokoi K Josho Y M Izuari T Suzuki T Nakayama H Suematsu S W Lee Z Fu K Niihara Extreme Energy-Density Research Institute Nagaoka University of Technology Niigata 940-2188 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Silver nanoparticles were prepared by pulsed wire discharge (PWD) using silver wire in deionized water at various relative energy (K) from 10 to 98, which is ratio of the charged energy of the capacitor in the electrical circuit to the vaporization energy of the wire. From energy deposition calculated by the measured voltage and current waveforms, deposited energy of the wire was increased with increasing K. From X-ray diffraction (XRD) analysis, prepared nanoparticles were phase identified as silver. From transmission electron microscopy observations, the shape of prepared silver nanoparticles were spherical and the median particle diameter (D50) and the geometric standard deviation (σg) were calculated from the particle distribution. D50 was decreased from 34 to 19 nm with increasing K. The particle size in prepared by PWD in liquid media can be controlled by K.

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Residual stress relaxation of cubic boron nitride thin films deposited in Ar with other noble gases

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IOP Conference Series: materials Science and Engineering 2011年第1期20卷

作者： T Ohori J Shirahata T Suzuki T Nakayama H Suematsu S W Lee Z Fu K Niihara Extreme Energy-Density Research Institute Nagaoka University of Technology Niigata 940-2188 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

A novel method based on radio frequency magnetron sputtering tailored to the deposition of low residual stress and adherent c-BN thin films on silicon substrates was developed. In this study, the effect of noble gas (Kr, Ar, Ne and He) added in Ar gas during sputtering on the residual stress and the c-BN content has been investigated. As a result, it was found that the residual stress of c-BN thin film decreased with increasing the helium gas flow rate within argon gas.

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Removal: “Ultra-Simple synthesis of Ordered Mesoporous γ-Alumina: High Thermal Stability and Catalytic Activity”

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European Journal of Inorganic Chemistry 2007年第35期2007卷 5605-5605页

作者： Le-Yue Li Quan Yuan Lei Liao Chun-Hua Yan Jun Chen State Key Lab of Advanced Technology for Materials Synthesis and Processing Department of Chemistry Wuhan University Wuhan 430070 China Fax: +86-27-68754112 Beijing National Laboratory for Molecular Sciences State Key Lab of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Lab in Rare Earth Materials and Bioinorganic Chemistry Peking University Beijing China

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