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Solvothermal Synthesis of TiO2/Bi2WOs Heterojunction Photocatalyst with Optimized interface structure and Enabled Photocatalytic Performance

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Chinese Journal of Chemistry 2017年第2期35卷 183-188页

作者： Linpeng Jiang Shujie Wang Liyi Shi Yin Zhao Zhuyi Wang Meihong Zhang Shuai Yuan Research Center of Nanoscience and Nanotechnology Shanghai University Shanghai 200444 China

TiO2/Bi2WO6 （TB） heterojunction photocatalyst was successfully synthesized and characterized by XRD, SEM, TEM, UV-Vis and photoluminescence measurement. The heterojunction interface structure of TB heterojunction photocatalyst was optimized via adjusting the ethylene glycol/water （EG/W） ratio. Based on XRD, SEM and TEM, the crystal size of Bi2WO6 reduced from 14.6 nm to 8.8 nm, and the interface structure between Bi2WO6 nanosheets and TiO2 particle significantly changed with increasing EG concentration. Furthermore, the photoeatalytic activity and the related mechanism of TB heterojunction photocatalyst were systematically discussed. Among them, TBEG/w sample shows the highest normalized apparent rate constant, which is attributed to its highest electron-hole pairs separation ability driven by optimized heterojunction interface between two semiconductors.

关键词： TiO2/Bi2WO6 heterojunction interface structure carriers separation photocatalytic

Dye-sensitized solar cells: Atomic scale investigation of interface structure and dynamics

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维普期刊数据库

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Chinese Physics B 2014年第8期23卷 2-12页

作者：马薇张帆孟胜 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Collaborative Innovation Center of Quantum Matter

Recent progress in dye-sensitized solar cells （DSC） research is reviewed, focusing on atomic-scale investigations of the interface electronic structures and dynamical processes, including the structure of dye adsorption onto Ti02, ultrafast electron injection, hot-electron injection, multiple-exciton generation, and electron-hole recombination. Advanced exper- imental techniques and theoretical approaches are briefly summarized, and then progressive achievements in photovoltaic device optimization based on insights from atomic scale investigations are introduced. Finally, some challenges and oppor- tunities for further improvement of dye solar cells are presented.

关键词： dye-sensitized solar cells interface structure absorption electron injection multiple-exciton generation charge recombination

interface structure and formation mechanism of diffusion-bonded joints of TiAl-based alloy to titanium alloy

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China Welding 2000年第2期9卷 36-40页

作者：刘会杰冯吉才

Vacuum diffusion bonding of a TiAl based alloy (TAD) to a titanium alloy (TC2) was carried out at 1 273 K for 15～120 min under a pressure of 25 MPa . The kinds of the reaction products and the interface structures of the joints were investigated by SEM, EPMA and XRD. Based on this, a formation mechanism of the interface structure was elucidated. Experimental and analytical results show that two reaction layers have formed during the diffusion bonding of TAD to TC2. One is Al rich α(Ti)layer adjacent to TC2,and the other is (Ti 3Al+TiAl)layer adjacent to TAD,thus the interface structure of the TAD/TC2 joints is TAD/(Ti 3Al+TiAl)/α(Ti)/*** interface structure forms according to a three stage mechanism,namely(a)the occurrence of a single phase α(Ti)layer;(b)the occurrence of a duplex phase(Ti 3Al+TiAl)layer;and(c)the growth of the α(Ti)and (Ti 3Al+TiAl)layers.

关键词： diffusion bonding interface structure formation mechanism TiAl based alloy titanium alloyH

CRYSTAL DEFECTS AND GRAIN interface structure OF ION-NITRIDED LAYERS

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Acta Metallurgica Sinica(English Letters) 1993年第6期6卷 358-362页

作者： SUN Dongsheng LI Fengzhao Shandong Polytechnic University,Jinan Laboratory of Atomic Imaging of Solids,Institute of Metal Research,Academia Sinica,Shenyang,ChinaDAI Jiyan LI Douxing Laboratory of Atomic Imaging of Solids,Institute of Metal Research,Academia Sinica,Shenyang,China associate professor,Institute of Materials Engineering,Shandong Polytechnic University,Jinan 250014,China

Observation under high resolution electron microscope shows that the continuous bombing of high speed ions produces a great amount of vacant site *** assembly of vacancies forms vacant dish,and the collapase of vacant dish forms stacking fault tetrahedrons and oth- er crystal *** interfaces between phase ε(Fe_(2-3)N)and phase γ'(Fe_4N)are smooth, straight and coherent,and they have the orientation relationships of(11)//(0001)and [110]/[110] .

关键词： crystal defect interface structure ion-nitriding steel 35CrMo

The interface structure of High Performance Expansive Concrete (HPEC)

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The Interface Structure of High Performance Expansive Concre...

structure evolution of the Fe_(3)C/Fe interface mediated by cementite decomposition in cold-deformed pearlitic steel wires

The 6th International Symposium on Cement & Concrete and Canmet/Aci International Symposium on Concrete Technology for Sustainable Development

作者： D.M. Wang1*, Y.F. Zuo1, Q. Li1, Y.M. Chen 2, Z. Lin2 and R.R. Tang2 1)China University of mining and technology, No.11, Xueyuan road, Haidian District, Beijing, 100083, China, 2)China Building Materials Academy, No.1,Guanzhuang Dongli, Chaoyang District, Beijing , 100024,China

The interface structure of several kinds of high performance expansive concrete (HPEC) is investigated using XRD, SEM. The results reveal that Ca (OH) 2 enriches and orients in the interface transitio

关键词： High performance expansive concrete interface structure interface transition zone XRD SEM.

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cnki会议

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Journal of Materials Science & Technology 2022年第6期101卷 28-36页

作者： Y.T.Zhou X.H.Shao S.J.Zheng X.L.Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Tianjin Key Laboratory of Materials Laminating Fabrication and interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China

Cold-drawn pearlitic steel wire is irreplaceably used in industry owing to its outstanding mechanical property which is dominated by the cementite/ferrite(Fe_(3)C/Fe) interfaces in the material. However, the fine structures of the Fe3C/Fe interfaces in the deformed wires are less known to date. In this work, transmission electron microscopic investigation was performed on the atomic structures of the interfaces with the Isaichev orientation relationship(OR) in the wires with progressive deformation strains. In addition to the effect of the dislocation/interface interactions, this work revealed that the deformation-induced partial decomposition of cementite plays an important role in the interface reconstruction during deformation. The interfacial carbon vacancies generated by cementite decomposition and particularly, the amorphization of cementite layers in the sample with ε > 1 could effectively annihilated the interfacial dislocations and consequently relaxed the interfacial stress. The correlations between the interface structure changes and the mechanical properties of the wires were discussed.

关键词： Pearlitic steel Cementite decomposition interface structure Deformation Transmission electron microscopy

Fine structure characterization of an explosively-welded GH3535/316H bimetallic plate interface

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International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1811-1820页

作者： Jia Xiao Ming Li Jian-ping Liang Li Jiang De-jun Wang Xiang-xi Ye Ze-zhong Chen Na-xiu Wang Zhi-jun Li School of Materials Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Dalian National Laboratory for Clean Energy Dalian 116023China Ministry of Ecology and Environment Beijing 100135China Institute of Zhejiang University-Quzhou Quzhou 324004China

An explosion-welded technology was induced to manufacture the GH3535/316H bimetallic plates to provide a more cost-effective structural material for ultrahigh temperature,molten salt thermal storage *** microstructure of the bonding interfaces were extensively investigated by scanning electron microscopy,energy dispersive spectrometry,and an electron probe *** bonding interface possessed a periodic,wavy morphology and was adorned by peninsula-or island-like transition *** higher magnification,a matrix recrystallization region,fine grain region,columnar grain region,equiaxed grain region,and shrinkage porosity were observed in the transition zones and surrounding *** backscattered diffraction demonstrated that the strain in the recrystallization region of the GH3535 matrix and transition zone was less than the *** concentration occurred at the interface and the solidification defects in the transition *** dislocation substructure in 316H near the interface was characterized by electron channeling contrast imaging.A dislocation network was formed in the grains of *** microhardness decreased as the distance from the welding interface increased and the lowest hardness was inside the transition zone.

关键词： GH3535/316H bimetallic plate ultrahigh temperature molten salt explosive welding interface structure dislocation substructure

Coupling interface constructions of FeOOH/NiCo_(2)S_(4)by microwave-assisted method for efficient oxygen evolution reaction

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Rare Metals 2023年第6期42卷 1847-1857页

作者： Ming-Liang Guo Zhi-Yu Wu Miao-Miao Zhang Zi-Jian Huang Ke-Xi Zhang Bing-Rong Wang Jin-Chun Tu State Key Laboratory of Marine Resource Utilization in the South China Sea College of Materials Science and EngineeringHainan UniversityHaikou570228China School of Science Hainan UniversityHaikou570228China

The oxygen evolution reaction(OER) with slow kinetics is the rate-limiting step of electrochemical water splitting.A reasonable construction of interface nanostructures is the key to improving the OER efficiency and durability of non-noble metal *** this study,a FeOOH/NiCo_(2)S_(4) core-shell nanorod array with abundant heterogeneous interfaces and high density of active sites was successfully prepared by a microwave-as sis ted *** research and theoretical calculations show that the abundant strong coupling Ni/Co-S-Fe interface helps in adjusting the electronic structure of the material surface,optimizing the adsorption energy of the intermediate,and realizing an efficient catalytic *** as-synthesized FeOOH/NiCo_(2)S_(4)/NF composite electrode exhibited lower overpotential(198 mV) and Tafel slope(62 mV·dec^(-1)) at a current density of 10 mA·cm^(-2)and excellent stability(approximately 100% retention after100 h) than the NiCo_(2)S_(4)/nickel foam(NF).In conclusion,constructing heterojunctions with complementary active materials is an effective strategy to design efficient and robust OER electrocatalysts.

关键词： Transition metal sulfides FeOOH interface structure Adsorption energy Oxygen evolution

Water-induced electrode poisoning and the mitigation strategy for high temperature polymer electrolyte membrane fuel cells

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Journal of Energy Chemistry 2022年第6期31卷 569-575,I0016页

作者： Zinan Zhang Zhangxun Xia Jicai Huang Fenning Jing Suli Wang Gongquan Sun Division of Fuel Cell&Battery Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Fuel Cell&Hybrid Power Sources Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Engineering failure of membrane electrode assembly caused by increasingly fuel poisoning in the high temperature polymer electrolyte membrane fuel cells fed with humidified reformate gases is firstly demonstrated herein this work. Based on the results of the in-situ environmental scanning electron microscope, electrochemical analyses, and limiting current method, a water-induced phosphoric acid invasion model is constructed in the porous electrode to elucidate the failure causations of the hindered hydrogen mass transport and the enhanced carbon monoxide poisoning. To optimize the phosphoric acid distribution under the inevitably humidified circumstance, a facile and effective strategy of constructing acid-proofed electrode is proposed and demonstrates outstanding stability with highly humidified reformate gases as anode fuel. This work discusses a potential defect that was rarely studied previously under practical working circumstance for high temperature polymer electrolyte membrane fuel cells, providing an alternative opinion of electrode design based on the fundamental aspects towards the engineering problems.

关键词： High temperature polymer electrolyte membrane fuel cells Reformate gases Phosphoric acid Porous electrode interface structure