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Al23/Al2O3 Joint Brazed with Al2O3-particulate-contained Composite Ag-Cu-Ti Filler Material 认领 引用 被引量：2
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作者 Jianguo YANG Hongyuan FANG Xin WAN 《Journal of Materials Science & Technology》 SCIE EI CAS 2005年第5期782-784,共3页
Microstructure and interracial reactions of Al2O3 joints brazed with Al2O3-particulate-contained composite Ag-Cu-Ti filler material were researched by scanning electron microscopy(SEM),electron probe microscopy analys... Microstructure and interracial reactions of Al2O3 joints brazed with Al2O3-particulate-contained composite Ag-Cu-Ti filler material were researched by scanning electron microscopy(SEM),electron probe microscopy analysis(EPMA),energy dispersive spectroscopy(EDS)and X-ray diffraction(XRD).The interracial reaction layer thickness of joints brazed with conventional active filler metal and active composite filler materials with different volume fraction of Al2O3 particulate was also studied.The experimental results indicated although there were Al2O3 particulates added into active filler metals,the time dependence of interracial layer growth of joints brazed with active composite filler material is t^1/2 as described by Fickian law as the joints brazed with conventional active filler metal. 展开更多
关键词 Composite filler materials Braze Interface Al2O3
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Cu/Cu2O催化剂的制备及其电催化硝酸盐产氨性能研究 认领 引用
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作者 李松泽 胡茂从 《现代化工》 CAS CSCD 北大核心 2026年第7期101-105,共5页
以泡沫铜为基底,经预处理、空气煅烧制备CuO电极。通过原位电化学重构法,在电解液中分别于-1.0、-1.4、-1.6 V(vs.Ag/AgCl)恒定电位下还原60 min,成功制备3种Cu/Cu2O复合催化剂。该催化剂由Cu0和Cu+共同组成,在电化学还原过程... 以泡沫铜为基底,经预处理、空气煅烧制备CuO电极。通过原位电化学重构法,在电解液中分别于-1.0、-1.4、-1.6 V(vs.Ag/AgCl)恒定电位下还原60 min,成功制备3种Cu/Cu2O复合催化剂。该催化剂由Cu0和Cu+共同组成,在电化学还原过程中发生表面价态变化与结构演变,其中由-1.4 V(vs.Ag/AgCl)还原的Cu/Cu2O复合催化剂表现出最优电催化硝酸盐还原制氨性能,氨产率达5704.6μg/(h·cm2),法拉第效率高达98.7%,为廉价高效制氨催化剂的设计提供了有效途径。 展开更多
关键词 泡沫铜 原位电化学重构 Cu/Cu2O复合催化剂
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Preparation and electrochemical property of Cs0.35V2O5/Cu composite material 认领 引用
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作者 CAO Xiao-yu YANG Jun XIE Ling-ling LIU Xing WANG Hong-yan YAN Xiang-yang 《Journal of Chemistry and Chemical Engineering》 2008年第6期52-55,共4页
Cs0.35V2O5 was successfully synthesized as cathode material for lithium secondary battery by the rheological phase reaction method from Cs2CO3 and NH4VO3. The Cs0.35V2O5/Cu composite material was prepared by the displ... Cs0.35V2O5 was successfully synthesized as cathode material for lithium secondary battery by the rheological phase reaction method from Cs2CO3 and NH4VO3. The Cs0.35V2O5/Cu composite material was prepared by the displacement reaction in CuSO4 solution using zinc powder as a reductant. The structure and electrochemical property of the so-prepared powders were characterized by means of XRD （powder X-ray diffraction） and the galvanostatic discharge-charge techniques. The results show that the electrochemical property of Cs0.35V2O5/Cu composite material is significantly improved compared to the bulk Cs0.35V2O5 material. The Cs0.35V2O5/Cu composite material exhibits the first discharge capacity as high as 164.3 mAh.g -1 in the range of 4.2-1.8V at a current rate of 10 mA.g-1 and remains at a stable discharge capacity of about 110 mAh.g-1 within 40 cycles. 展开更多
关键词 lithium secondary batteries cathode material Cs0.35V2O5/Cu composite material electrochemical property
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Facile one-step synthesis of Cu_2O@Cu sub-microspheres composites as anode materials for lithium ion batteries 认领 引用 被引量：4
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作者 Huijie Zhou Hongbin Zhao +3 位作者 Xuan Zhang Hongwei Cheng Xionggang Lu Qian Xu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2018年第7期1085-1090,共6页
Cu2O@Cu sub-microspheres composites with a narrow particle size distribution from 300 to 500 nm was successfully fabricated by one-step synthesis through the direct thermal decomposition of copper nitrate （Cu（NO3）2... Cu2O@Cu sub-microspheres composites with a narrow particle size distribution from 300 to 500 nm was successfully fabricated by one-step synthesis through the direct thermal decomposition of copper nitrate （Cu（NO3）2） in octadecylamine （ODA） solvent. As anode materials for lithium ion batteries, the Cu2O@Cu composites obviously possess high specific capacity, excellent cyclic stability and rate capability. The coulombic efficiency is about 84% in the 1 st cycle and increases significantly up to 97.8% during successive cycles at various current densities. Even under a high current density of 500 mA g^-l, the discharge capacity of Cu2O@Cu composites remains up to 200 mAh g^-1. The excellent electrochemical properties are ascribed to the synergistic effect between high electronic conductivity and volume-buffering capacity of metallic copper composited with Cu2O.2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science ＆ Technology. 展开更多
关键词 Cu2O@Cu composites Anode materials Octadecylamine One-step synthesis
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Characterization of Calcined Kaolin/TiO2Composite Particle Material Prepared by Mechano-Chemical Method 认领 引用 被引量：12
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作者 WANG Baikun DING Hao DENG Yanxi 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2010年第5期765-769,共5页
Calcined kaolin/TiO2 composite particle material(CK/TCPM)was prepared with TiO2 coating on the surfaces of calcined kaolin particles by the mechano-chemical method.X-ray diffraction(XRD)and scanning electron microscop... Calcined kaolin/TiO2 composite particle material(CK/TCPM)was prepared with TiO2 coating on the surfaces of calcined kaolin particles by the mechano-chemical method.X-ray diffraction(XRD)and scanning electron microscope(SEM)were used to investigate the microstructures and morphologies,respectively.The mechanism of the mechano-chemical reaction between calcined kaolin and TiO2 was studied by infrared spectra(IR).The results show that TiO2 coats evenly on the surfaces of calcined kaolin particles by Si-O-Ti and Al-O-Ti bonds on their interfaces.The hiding power and whiteness of CK/TCPM are 17.12 g/m^2 and 95.7%,respectively,presenting its similarity to TiO2 in pigment properties. 展开更多
关键词 mechano-chemical method calcined kaolin TiO2 composite particles material pigment properties
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Morphology and Frictional Characteristics Under Electrical Currents of Al_2O_3/Cu Composites Prepared by Internal Oxidation 认领 引用 被引量：10
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作者 刘瑞华 宋克兴 +3 位作者 贾淑果 徐晓峰 郜建新 国秀花 《Chinese Journal of Aeronautics》 SCIE EI CAS 2008年第3期281-288,共8页
Two Al2O3/Cu composites containing 0.24 wt.% Al2O3 and 0.60 wt.% Al2O3 separately are prepared by internal oxidation. Effects of sliding speed and pressure on the frictional characteristics of the composites and coppe... Two Al2O3/Cu composites containing 0.24 wt.% Al2O3 and 0.60 wt.% Al2O3 separately are prepared by internal oxidation. Effects of sliding speed and pressure on the frictional characteristics of the composites and copper against brass are investigated and compared. The changes in morphology of the sliding surface and subsurface are examined with scanning electron microscope （SEM） and energy dispersive X-ray spectrum （EDS）. The results show that the wear resistance of the Al2O3/Cu composites is superior to that of copper under the same conditions, Under a given electrical current, the wear rate of Al2O3/Cu composites decreases as the Al2O3-content increases, However, the wear rates of the Al2O3/Cu composites and copper increase as the sliding speed and pressure increase under dry sliding condition. The main wear mechanisms for Al2O3/Cu composites are of abrasion and adhesion; for copper, it is adhesion, although wear by oxidation and electrical erosion can also be observed as the speed and pressure rise. 展开更多
关键词 Al2O3/Cu composite internal oxidation friction and wear surface morphology current carder
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Facile synthesized Cu-SnO2 anode materials with three-dimensional metal cluster conducting architecture for high performance lithium-ion batteries 认领 引用 被引量：3
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作者 Zhijia Zhang Yuxuan Hou +9 位作者 Shaofei Zhang Guoliang Zhang Ming Li Huanming Lu Yong Li Xuerong Zheng Zhijun Qiao Zhenyang Yu Qin Huang Jianli Kang 《Chinese Chemical Letters》 SCIE CAS CSCD 2018年第11期1656-1660,共5页
Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/ discharge, however... Metal oxide anode material is one of promising candidates for the next-generation LIBs, due to its high theoretical capacity and low cost. The poor conductivity and huge volume change during charge/ discharge, however, restrict the commercialization of metal oxide anode material. In this work, we design a novel Cu-SnO2 composite derived from Cu6Sn5 alloy with three dimensional （3D） metal cluster conducting architecture. The novel Cu structure penetrates in the composite particles inducing high conductivity and space-confined SnO2, which restrict the pulverization of SnO2 during lithiation/ delithiation process. The optimized Cu-SnO2 composite anode delivers an initial discharge capacity of 933.7 mA h/g and retains a capacity of 536.1 mA h/g after 200 cycles, at 25℃ and a rate of 100 mA/g. Even at the high rate of 300 mA/g, the anode still exhibits a capacity of more than 29% of that tested at 50 mA/g. Combining with the phase and morphology analysis, the novel Cu-SnO2 composite not only has good electrical conductivity, but also possesses high theoretical capacity （995 mAh/g）, which may pave a new way for the design and construction of next-generation metal oxide anode materials with high power and cycling stability. 展开更多
关键词 Cu-SnO2 composite Cu6Sn5 alloy Ball milling Anode materials Lithium-ion batteries
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High Temperature Deformation of Al_2O_3/Cu Composites 认领 引用 被引量：3
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作者 Jianjun WU. Yun ZHANG, Yanfei JIANG and Meiyun XUE Department of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China Tingquan LEI School of Materials Science and Engineering, Harbin Institute of Technology, Uarbin 15000 《Journal of Materials Science & Technology》 SCIE EI CAS 2001年第3期325-328,共4页
This work concerns with the high temperature deformation of internally oxidized Al2O3/Cu composites. The investigation revealed that dispersive alumina can obstruct dislocation sliding and define the subgrain size the... This work concerns with the high temperature deformation of internally oxidized Al2O3/Cu composites. The investigation revealed that dispersive alumina can obstruct dislocation sliding and define the subgrain size thereby improve significantly the strength of the materials at high temperature. The sliding of dislocations is a main deformation mechanism in the given temperature range. The sliding of grain boundary and diffusive creep play important roles at high temperature and low strain rate. The dispersoids can raise the recrystallization temperature to higher than 1223 K. Dynamic recovery is a main softening way under the experimental conditions. Higher deformation rate and lower deformation temperature imply a higher flow stress. 展开更多
关键词 High Temperature Deformation of Al2O3/Cu Composites Cu Al
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Reaction thermodynamics and kinetics on in situ Al_2O_3/Cu composites 认领 引用 被引量：4
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作者 Li Guobin 1, Wu Jianjun 1, Guo Quanmei 2, Jiang Yanfei 1, Shen Yutian 1, Lei Tingquan 2 1. Department of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P.R.Chi 《中国有色金属学会会刊：英文版》 1999年第3期617-622,共6页
The preferred internal oxidation of aluminum in Cu Al alloy was used to obtain in situ Al 2O 3/Cu composites. The reinforcement particles were mainly γ Al 2O 3, some θ Al 2O 3 and a little α Al 2O 3. Thermodynamics... The preferred internal oxidation of aluminum in Cu Al alloy was used to obtain in situ Al 2O 3/Cu composites. The reinforcement particles were mainly γ Al 2O 3, some θ Al 2O 3 and a little α Al 2O 3. Thermodynamics analyses show that the chemical reactions are 3Cu 2O+2Al=6Cu+Al 2O 3 or 3CuO+2Al=3Cu+Al 2O 3. A related equilibrium diagram was drawn. The experiments and investigation show that the formation rate of Al 2O 3 was controlled by the diffusion of oxygen in matrix. 展开更多
关键词 Al 2O 3/Cu composites internal oxidation thermodynamics kineticsDocument code: A
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TiO2-PES Fibrous Composite Material for Ammonia Removal Using UV-A Photocatalyst 认领 引用
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作者 Anh Phuong Le Thi Masaru Ohshiro Takaomi Kobayashi 《Journal of Materials Science and Chemical Engineering》 2024年第1期1-19,共19页
This study focused on the development and characterization of TiO2-PES composite fibers with varying TiO2 loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structu... This study focused on the development and characterization of TiO2-PES composite fibers with varying TiO2 loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structure with embedded TiO2 nanoparticles within a polymer matrix. Their photocatalytic performance for ammonia removal from aqueous solutions under UV-A light exposure was thoroughly investigated. The findings revealed that PeTi8 composite fibers displayed superior adsorption capacity compared to other samples. Moreover, the study explored the impact of pH, light intensity, and catalyst dosage on the photocatalytic degradation of ammonia. Adsorption equilibrium isotherms closely followed the Langmuir model, with the results indicating a correlation between qm values of 2.49 mg/g and the porous structure of the adsorbents. The research underscored the efficacy of TiO2 composite fibers in the photocatalytic removal of aqueous under  UV-A light. Notably, increasing the distance between the photocatalyst and the light source resulted in de-creased hydroxyl radical concentration, influencing photocatalytic efficiency. These findings contribute to our understanding of TiO2 composite fibers as promising photocatalysts for ammonia removal in water treatment applications. 展开更多
关键词 Ammonia Removal Photocatalyst TiO2-PES Composite Fiber Fibrous Material
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High photocatalytic activity of Cu2O/TiO2/Pt composite films prepared by magnetron sputtering 认领 引用 被引量：4
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作者 Guang-Xiao Ren Bin Yu +3 位作者 Yi-Ming Liu Hong-Xia Wang Wang-Gang Zhang Wei Liang 《Rare Metals》 SCIE EI CAS CSCD 2017年第10期821-827,共7页
Cu2O/TiOa/Pt three-layer films were deposited on glass substrates using magnetron sputtering method. The surface morphology and the optical properties of the composite film were characterized by X-ray diffraction （XR... Cu2O/TiOa/Pt three-layer films were deposited on glass substrates using magnetron sputtering method. The surface morphology and the optical properties of the composite film were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, ultraviolet- visible spectroscopy （UV-Vis） and photoluminescence spectroscopy （PL）. The photocatalytic activity of the samples was evaluated by the photocatalytic degradation of methyl orange （MO） aqueous solution under visible light irradiation. The results indicate that the Cu2O/TiO2/Pt composite films are made up of three layers which are Pt layer, anatase-TiO2 layer and Cu2O layer from bottom to top. The surface of the films is even and composed of regular-shaped spherical particles. The photocatalytic activity of the Cu2O/TiO2/Pt three-layer film is much higher than that of the Cu2O/TiO2 double-layer film. Such enhancement is ascribed to the presence of Pt layer, which further inhibits the photogenerated electron-hole recombination, prolongs the lifetime of the photogenerated carriers, increases the quantum efficiency and hence improves the photocatalytic activity of the film effectively. 展开更多
关键词 Cu2O/TiO2/Pt Composite films Visible light Photocatalytic activity
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脉冲沉积制备Cu_2O/TiO_2纳米管异质结的可见光光催化性能 认领 引用 被引量：9
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作者 张剑芳 王岩 +4 位作者 沈天阔 舒霞 崔接武 陈忠 吴玉程 《物理化学学报》 SCIE CAS CSCD 北大核心 2014年第8期1535-1542,共8页
在用阳极氧化法制备有序排列TiO2纳米管阵列薄膜的基础上,引入脉冲沉积工艺,成功实现了均匀、弥散分布的Cu2O纳米颗粒修饰改性TiO2纳米管阵列,形成Cu2O/TiO2纳米管异质结复合材料.利用场发射扫描电镜(FESEM)、场发射透射电镜(FETEM)、X... 在用阳极氧化法制备有序排列TiO2纳米管阵列薄膜的基础上,引入脉冲沉积工艺,成功实现了均匀、弥散分布的Cu2O纳米颗粒修饰改性TiO2纳米管阵列,形成Cu2O/TiO2纳米管异质结复合材料.利用场发射扫描电镜(FESEM)、场发射透射电镜(FETEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)和紫外-可见漫反射光谱(UV-Vis DRS)对样品进行表征,重点研究了Cu2O/TiO2纳米管异质结的光电化学特性和对甲基橙(MO)的可见光催化降解性能.结果表明,Cu2O纳米颗粒均匀附着在TiO2纳米管阵列的管口和中部位置,所制备的Cu2O/TiO2纳米管异质结具有高效的可见光光催化性能;在浓度为0.01 mol?L-1的CuSO4溶液中制得的Cu2O/TiO2纳米管异质结表现出最好的电化学特性和光催化性能;另外,对Cu2O纳米颗粒影响光催化活性的机理进行了讨论. 展开更多
关键词 TiO2纳米管阵列 脉冲沉积 Cu2O TiO2纳米管异质结 光电化学性能 光催化
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Cu_2O/TiO_2催化甲醛乙炔化反应的载体效应 认领 引用 被引量：10
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作者 李海涛 牛珠珠 +3 位作者 杨国峰 张鸿喜 王志鹏 赵永祥 《化工学报》 EI CSCD 北大核心 2018年第6期2512-2518,共7页
以不同温度焙烧的TiO_2为载体,CuCl_2·2H_2O为铜源,NaOH为沉淀剂,L-抗坏血酸钠为还原剂,采用液相还原-沉积沉淀法制备了Cu_2O/TiO_2,借助X射线粉末衍射(XRD)、H_2程序升温还原(H_2-TPR)、N_2-物理吸附、透射电镜(TEM)、X射线光电... 以不同温度焙烧的TiO_2为载体,CuCl_2·2H_2O为铜源,NaOH为沉淀剂,L-抗坏血酸钠为还原剂,采用液相还原-沉积沉淀法制备了Cu_2O/TiO_2,借助X射线粉末衍射(XRD)、H_2程序升温还原(H_2-TPR)、N_2-物理吸附、透射电镜(TEM)、X射线光电子能谱(XPS)等手段,研究了TiO_2载体焙烧温度对Cu_2O/TiO_2甲醛乙炔化反应性能的影响。结果表明,低温焙烧得到的TiO_2载体以锐钛矿相存在,与Cu_2O物种间具有弱的相互作用,使得Cu_2O被过度还原为金属Cu,催化活性较低。随着载体焙烧温度的升高,TiO_2中出现金红石相,Cu_2O与载体间相互作用增强,Cu_2O高效转变为乙炔亚铜活性物种,使催化剂表现出最佳的催化性能。 展开更多
关键词 催化 载体 Cu2O/TiO2 甲醛乙炔化 1,4-丁炔二醇
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不同晶相TiO_2负载Cu_2O催化甲醛乙炔化反应 认领 引用 被引量：11
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作者 王志鹏 牛珠珠 +4 位作者 班丽君 郝全爱 张鸿喜 李海涛 赵永祥 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2019年第2期334-341,共8页
分别以金红石相和锐钛矿相TiO_2为载体,采用液相还原-沉积法制备了Cu_2O/TiO_2催化剂.采用氮气物理吸附-脱附(N2-physisorption)实验、氢气程序升温还原(H2-TPR)、X射线衍射(XRD)、X射线光电子能谱(XPS)、CO红外光谱(CO-IR)及高分辨透... 分别以金红石相和锐钛矿相TiO_2为载体,采用液相还原-沉积法制备了Cu_2O/TiO_2催化剂.采用氮气物理吸附-脱附(N2-physisorption)实验、氢气程序升温还原(H2-TPR)、X射线衍射(XRD)、X射线光电子能谱(XPS)、CO红外光谱(CO-IR)及高分辨透射电子显微镜(HRTEM)等技术,研究了不同晶相TiO_2载体对Cu_2O/TiO_2结构及其催化甲醛乙炔化反应性能的影响.结果表明,以金红石相TiO_2为载体的催化剂炔化活性明显高于以锐钛矿相TiO_2为载体的催化剂,原因在于金红石相TiO_2主要暴露(110)晶面,其与铜物种的配位环境及较高的空位密度形成了更多的Cu—O—Ti结构物种,表现为Cu_2O与TiO_2之间强的相互作用.这导致Cu_2O高效转变为乙炔亚铜活性物种,并保持了较高的分散度与稳定性,抑制了过度还原物种金属Cu的生成,进而使催化剂表现出较高的催化性能. 展开更多
关键词 Cu2O/TiO2 晶相结构 甲醛乙炔化 1,4-丁炔二醇
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Cu_2O/TiO_2光催化降解罗丹明B工艺条件的研究 认领 引用 被引量：9
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作者 孙伟 梁光远 +2 位作者 赵丽平 叶兆伟 殷东林 《工业水处理》 CAS CSCD 北大核心 2014年第5期54-57,共4页
采用负载型催化剂Cu2O/TiO2，以太阳光为光源，研究了其对可溶性染料罗丹明B的降解情况。主要考察了催化剂投加量，H202投加体积分数，溶液的酸度和反应物初始浓度等条件对罗丹明B催化降解过程的影响，从而研究催化降解的工艺条件。结... 采用负载型催化剂Cu2O/TiO2，以太阳光为光源，研究了其对可溶性染料罗丹明B的降解情况。主要考察了催化剂投加量，H202投加体积分数，溶液的酸度和反应物初始浓度等条件对罗丹明B催化降解过程的影响，从而研究催化降解的工艺条件。结果表明：Cu2O/TiO22对罗丹明B有较好的降解效果，其最佳工艺条件为：催化剂用量为1g/L，H2O2投加体积分数为1．5％，pH为5-7。此条件下，10min就能使5mg/L的罗丹明B溶液达到96％的降解率。 展开更多
关键词 负载型催化剂Cu2O TiO2 光催化 罗丹明B 工艺条件
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Enhanced thermoelectric performance of Bi2Se3/TiO2 composite 认领 引用 被引量：8
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作者 Yu-Xi Yang Ye-Hao Wu +3 位作者 Qi Zhang Gao-Shao Cao Tie-Jun Zhu Xin-Bing Zhao 《Rare Metals》 SCIE EI CAS CSCD 2020年第8期887-894,共8页
Bi2(Te,Se)3 alloys are conventional commercial thermoelectric materials for solid-state refrigeration around room temperature.In recent years,much attention has been paid to various advanced thermoelectric composite m... Bi2(Te,Se)3 alloys are conventional commercial thermoelectric materials for solid-state refrigeration around room temperature.In recent years,much attention has been paid to various advanced thermoelectric composite materials due to the unique thermoelectric properties.In this work,Bi2Se3/TiO2 composites were prepared by hot pressing the plate-like Bi2Se3 powders coated in situ with hydrolyzed hytetabutyl-n-butyl titanate(TNBT),and therefore numerous TiO2 in micrometer size could be formed on the interface of Bi2Se3 grains.The carrier concentration in Bi2Se3 matrix is optimized subject to the addition of n-type semiconductor TiO2,contributing to a significant improved power factor.In the meantime,the lattice thermal conductivity is also suppressed due to the enhanced phonon scattering at Bi2Se3/TiO2 interface and amorphous TiO2 particles.As a consequence,a peak figure of merit(zT)of 0.41 is obtained at 525 K in Bi2Se3/15 mol%TiO2 composites,nearly 50%augment over the pristine Bi2Se3 binary compound. 展开更多
关键词 Bi2(Te,Se)3 Thermoelectric materials TiO2 Composite
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纳米TiO_2/Cu_2O复合物的可见光降解活性艳红和分解水制氢的机理 认领 引用 被引量：10
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作者 熊良斌 冯杰 +2 位作者 胡安正 闫楠楠 王辉 《中国有色金属学报》 EI CAS 北大核心 2010年第9期1737-1742,共6页
采用溶胶-凝胶法和化学沉积法制备纳米TiO2/Cu2O复合粉体。可见光光催化实验结果表明:TiO2/Cu2O复合粉体具有较高的可见光降解活性和分解水制氢性能。根据TiO2和Cu2O的导带和价带位置以及TiO2、Cu2O和TiO2/Cu2O复合粉体的可见光光催化... 采用溶胶-凝胶法和化学沉积法制备纳米TiO2/Cu2O复合粉体。可见光光催化实验结果表明:TiO2/Cu2O复合粉体具有较高的可见光降解活性和分解水制氢性能。根据TiO2和Cu2O的导带和价带位置以及TiO2、Cu2O和TiO2/Cu2O复合粉体的可见光光催化实验结果,提出TiO2/Cu2O复合粉体的可见光光催化机理:在可见光照射下,Cu2O导带上产生的电子转移到TiO2的导带上,Ti4+捕获这些电子后成为Ti3+,这些被捕获的电子具有很长的寿命,能转移到复合粉体和溶液的界面。在光降解活性艳红的过程中,这些电子与吸附氧结合后可最终形成过氧化物自由基或氢氧自由基,从而氧化有机物;而在分解水制氢过程中,这些电子与H+结合后可形成H2。光照后TiO2/Cu2O复合粉体的XPS表征显示Ti3+的存在,证明机理理论的正确性。 展开更多
关键词 TiO2/Cu2O复合粉体 活性艳红 三价钛离子 光催化 制氢 X射线光电子能谱
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纳米TiO_2/Cu_2O光催化降解活性艳红X-3B的研究 认领 引用 被引量：7
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作者 王雅楠 李俊航 +3 位作者 杜啟君 刘心建 许文杰 方涛 《工业水处理》 CAS CSCD 北大核心 2018年第8期11-14,共4页
采用溶胶-凝胶法制备了纳米TiO_2,合成了TiO_2/Cu_2O复合光催化剂,并对合成的TiO_2和TiO_2/Cu_2O进行SEM和XRD表征。在高压汞灯照射下,采用TiO_2/Cu_2O复合光催化剂对活性艳红X-3B进行光催化降解反应,考察了n(Ti4+)∶n(Cu2+)、pH... 采用溶胶-凝胶法制备了纳米TiO_2,合成了TiO_2/Cu_2O复合光催化剂,并对合成的TiO_2和TiO_2/Cu_2O进行SEM和XRD表征。在高压汞灯照射下,采用TiO_2/Cu_2O复合光催化剂对活性艳红X-3B进行光催化降解反应,考察了n(Ti4+)∶n(Cu2+)、pH、反应温度等因素的影响。结果表明,在高压汞灯照射下,与纳米TiO_2相比,TiO_2/Cu_2O的光催化降解效果得到明显提高。以0.01gTiO_2/Cu_2O复合物为光催化剂,在高压汞灯照射下,降解100mL20mg/L的活性艳红X-3B溶液,起始pH为1,水浴温度为60℃,反应60min,活性艳红X-3B最佳降解率为83.6%。 展开更多
关键词 Cu2O TiO2 光催化 活性艳红X-3B
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Texture Analysis of High T_c.Superconducting YBa_2Cu_3O7-x Ceramic Material 认领 引用
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作者 Wang Chaoqun Wang Yun Yu Dingan Yu Guihua General Research Institute for Nonferrous Metals,Beijing 《Rare Metals》 SCIE EI CAS 1989年第3期66-67,共2页
YBaCuO(YBCO) is one of thesuperconducting oxides with transition tem-perature above 90K.It has a orthorhombic crystal structrure ofa layered-perovskite-type with oxygen defi-ciency.This kind of material shows differen... YBaCuO(YBCO) is one of thesuperconducting oxides with transition tem-perature above 90K.It has a orthorhombic crystal structrure ofa layered-perovskite-type with oxygen defi-ciency.This kind of material shows differentdegree of preferred orientation after the 展开更多
关键词 Texture Analysis of High Tc.Superconducting YBa2Cu3O Ceramic Material Cu
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Corrosion resistance evaluation of highly dispersed MgO–MgAl2O4–ZrO2 composite and analysis of its corrosion mechanism: A chromium-free refractory for RH refining kilns 认领 引用 被引量：5
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作者 Yi-nan Shen Yi Xing +4 位作者 Peng Jiang Yong Li Wen-dong Xue Guo-xiang Yin Xue-qin Hong 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2019年第8期1038-1046,共9页
The corrosion resistance behavior of a highly dispersed MgO-MgAl2O4-ZrO2 composite refractory material is examined by testing with high-basicity and low-basicity RH(Ruhrstahl-Hereaeus)slags.The composite material exhi... The corrosion resistance behavior of a highly dispersed MgO-MgAl2O4-ZrO2 composite refractory material is examined by testing with high-basicity and low-basicity RH(Ruhrstahl-Hereaeus)slags.The composite material exhibits greater resistance to the RH slags than the traditional MgO-Cr2O3 composite,MgO-ZrO2 composite,and MgO-MgAl2O4-ZrO2 composite.On the basis of the microstructural analysis and mechanisms calculations,the corrosion resistance behavior of the MgO-MgAl2O4-ZrO2 composite is attributable to its highly dispersed structure,which helps protect the high activity of ZrO2.When in contact with the slag,ZrO2 reacts with CaO to form the stable phase CaZrO3,which protects MgAl2O4 against corrosion,thereby enhancing the corrosion resistance of the composite. 展开更多
关键词 highly dispersed MgO-MgAl2O4-ZrO2 composite material RH refining chrome-free refractory slag corrosion resistance
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