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Preparation and characterization of ZrO_2/TiO_2 composite photocatalytic film by micro-arc oxidation 认领 引用 被引量：9
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作者 罗强 蔡启舟 +4 位作者 李欣蔚 潘振华 李玉洁 陈喜娣 严青松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第10期2945-2950,共6页
ZrO2/TiO2 composite photocatalytic film was produced on the pure titanium substrate using in-situ Zr（OH）4 colloidal particle by the micro-arc oxidation technique and characterized by scanning electron microscope （... ZrO2/TiO2 composite photocatalytic film was produced on the pure titanium substrate using in-situ Zr（OH）4 colloidal particle by the micro-arc oxidation technique and characterized by scanning electron microscope （SEM）, energy dispersive X-ray （EDX）, X-ray diffraction （XRD） and ultraviolet-visible （UV-Vis） spectrophotometer. The composite film shows a lamellar and porous structure which consists of anatase, futile and ZrO2 phases. The optical absorption edge of film is shifted to longer wavelength when ZrO2 is introduced to TiO2. Furthermore, the photocatalytic reaction rate constants of degradation of rhodamine B solution with ZrO2/TiO2 composite film and pure TiO2 film under ultraviolet irradiation are measured as 0.0442 and 0.0186 h 1, respectively. 展开更多
关键词 pure titanium micro-arc oxidation Zr（OH）4 colloidal particle ZrO2/TiO2 composite photocatalytic film
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Preparation and electrocatalytic property of Au-Pt/SnO2/GC composite electrode 认领 引用
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作者 YU Zhihui XIE Jia +2 位作者 BAI Jie TIAN Mi XIA Dingguo 《Rare Metals》 SCIE EI CAS 2009年第4期350-354,共5页
Au-Pt/SnO2/GC composite electrode was prepared by self-assembling Au-Pt nanoparticles on SnO2 film,which was deposited on actived glassy carbon(GC).Atomic force microscopy(AFM)and scanning electron microscopy(SEM)imag... Au-Pt/SnO2/GC composite electrode was prepared by self-assembling Au-Pt nanoparticles on SnO2 film,which was deposited on actived glassy carbon(GC).Atomic force microscopy(AFM)and scanning electron microscopy(SEM)images revealed that dense and uniform Au-Pt particles with 25-nm diameter were dispersed on SnO2 film.X-ray photoelectron spectroscopy(XPS)results proved that there was an interaction between Au-Pt nanoparticles and SnO2 support.Electrochemical experiments showed that Au-Pt/SnOz/GC composite electrode had a good electrocatalytic activity to the oxidation of methanol. 展开更多
关键词 electrochemistry composite electrode self-assembling Au-Pt SnO2 methanol oxidation
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Morphology and conductivity of in-situ PEO-LiClO_4-TiO_2 composite polymer electrolyte 认领 引用 被引量：3
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作者 潘春跃 冯庆 +2 位作者 王丽君 张倩 巢猛 《Journal of Central South University of Technology》 2007年第3期348-352,共5页
PEO-LiClO4-TiO2 composite polymer electrolyte films were prepared. TiO2 was formed directly in matrix by hydrolysis and condensation reaction of tetrabutyl titanate. The crystallinity, morphology and ionic conductivit... PEO-LiClO4-TiO2 composite polymer electrolyte films were prepared. TiO2 was formed directly in matrix by hydrolysis and condensation reaction of tetrabutyl titanate. The crystallinity, morphology and ionic conductivity of composite polymer electrolyte films were examined by differential scanning calorimetry, scanning electron microscopy, atom force microscopy and alternating current impedance spectroscopy, respectively. The glass transition temperature and the crystallinity of composite polymer electrolytes are decreased compared with those of PEO-LiClO4 polymer electrolyte film. The results show that TiO2 particles are uniformly dispersed in PEO-LiClO4-5%TiO2 composite polymer electrolyte film. The maximal conductivity of 5.5×10、5 Scm at 20 ℃ of PEO-LiClO4-TiO2 film is obtained at 5% mass fraction of TiO2. 展开更多
关键词 polyethylene oxide （PEO） TiO2 composite polymer electrolyte in-situ composite conductivity
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Preparation and Characterization of Tetracomponent ZnO/SiO2/SnO2/TiO2Composite Nanofibers by Electrospinning 认领 引用
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作者 Chao Song Xiangting Dong 《Advances in Chemical Engineering and Science》 CAS 2012年第1期108-112,共5页
[Zn(CH3COO)2 + PVP]/[C2H5O)4Si + PVP]/[SnCl4 + PVP]/[Ti(OC4H9)4 + CH3COOH + PVP] precursor composite fibers have been fabricated through self-made electrospinning equipment via electrospinning tech-nique. ZnO/SiO2/SnO... [Zn(CH3COO)2 + PVP]/[C2H5O)4Si + PVP]/[SnCl4 + PVP]/[Ti(OC4H9)4 + CH3COOH + PVP] precursor composite fibers have been fabricated through self-made electrospinning equipment via electrospinning tech-nique. ZnO/SiO2/SnO2/TiO2 composite nanofibers were obtained by calcination of the relevant precursor composite fibers. The samples were characterized by thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR), and Scanning electron microscopy (SEM). TG-DTA analysis reveals that solvents, organic compounds and inorganic in the precursor composite fibers are decomposed and volatilized totally, and the mass of the samples kept constant when sintering temperature was above 900?C, and the total mass loss percentage is 88%. XRD results show that the precursor composite fibers are amorphous in structure, and pure phase ZnO/SiO2/SnO2/TiO2 com-posite nanofibers are obtained by calcination of the relevant precursor composite fibers. FTIR analysis manifests that pure inorganic oxides are formed. SEM analysis indicates that the width of the precursor composite fibers is ca. 1.485 ± 0.043 μm. The width of the ZnO/SiO2/SnO2/TiO2 composite nanofibers is ca. 1145.098 ± 68.093 nm. 展开更多
关键词 ZnO/SiO2/SnO2/TiO2 Tetracomponent Composite Nanofibers Electrospinning
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Preparation of defect free ceramic/Ti composite membranes by surface modification and in situ oxidation 认领 引用 被引量：1
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作者 ZHANG Dong-qiang YANG Ping +2 位作者 WU Jian-yang ZHAO Jing CHEN Yan-an 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第12期3295-3304,共10页
Al2O3 ceramic powder was applied to modify the large pores defects on the surface of the porous metal Ti support,in situ oxidation method was a convenient method to prepare defect free ceramic/Ti composite membranes o... Al2O3 ceramic powder was applied to modify the large pores defects on the surface of the porous metal Ti support,in situ oxidation method was a convenient method to prepare defect free ceramic/Ti composite membranes on this basis.In situ oxidation conditions experimental results show that the best condition for preparing the TiO2-Al2O3/Ti composite membrane is under 800°C for 2 h,and the microstructure and pore sizes of the TiO2-Al2O3/Ti composite membranes are affected obviously.The thickness and composition of the TiO2/Ti composite membranes are determined by SEM and XRD completely.The pore size distribution of the composite membrane is measured by bubble pressure method,the most probable aperture is about 3.12μm,while the average pore size of defect free TiO2-Al2O3/Ti is about 3.23μm.After ultrasonic treatment,the slight weight change of membranes reveals no observable change,which indicates that TiO2-Al2O3/Ti composite membranes maintain a good stability. 展开更多
关键词 porous Ti ceramic TiO2 layer in situ oxidation composite membrane surface modification
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Reduction Band Gap Energy of TiO2Assembled with Graphene Oxide Nanosheets 认领 引用 被引量：1
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作者 Abdelmajid Timoumi 《Graphene》 2018年第4期31-38,共8页
This research work aims to reduce the band gap of thin layers of titanium oxide by the incorporation of graphene oxide sheets. Thin layers of the TiO2-GO composites were prepared on a glass substrate by the spin-coati... This research work aims to reduce the band gap of thin layers of titanium oxide by the incorporation of graphene oxide sheets. Thin layers of the TiO2-GO composites were prepared on a glass substrate by the spin-coating technique from GO and an aqueous solution of TiO2. A significant decrease in optical band gap was observed at the TiO2-GO compound compared to that of pure TiO2. Samples as prepared were characterized using XRD, SEM and UV-visible spectra. XRD analysis revealed the amorphous nature of the deposited layers. Scanning electron microscope reveals the dispersion of graphene nanofiles among titanium oxide nanoparticles distributed at the surface with an almost uniform size distribution. The band gap has been calculated and is around 2 eV after incorporation of Graphene oxide. The chemical bond C-Ti between the titanium oxide and graphene sheets is at the origin of this reduction. 展开更多
关键词 Titanium (IV) Oxide Graphene Oxide TiO2-GO Thin Films Composite Materials
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纳米TiO_2复合微粒的制备及应用 认领 引用 被引量：2
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作者 杨毅 李凤生 《微纳电子技术》 CAS 2002年第2期18-21,共4页
为了改善纳米半导体TiO2的分散性,制备了以微米级的PMMA塑料粒子为核心粒子的TiO2/PMMA复合微粒和以SiO2作为表面包覆的TiO2/SiO2复合粒子。通过对TiO2/PMMA进行紫外、SEM测试,发现由于TiO2粒子分散性的改善,复合微粒对紫外线的吸收能... 为了改善纳米半导体TiO2的分散性,制备了以微米级的PMMA塑料粒子为核心粒子的TiO2/PMMA复合微粒和以SiO2作为表面包覆的TiO2/SiO2复合粒子。通过对TiO2/PMMA进行紫外、SEM测试,发现由于TiO2粒子分散性的改善,复合微粒对紫外线的吸收能力为纳米TiO2与PMMA塑料粒子混合物的3～10倍。在对TiO2/SiO2进行TEM、XRD及比表面测试后,结果表明复合粒子是由4nm的SiO2膜和约12.6nm的TiO2核组成。 展开更多
关键词 纳米复合材料 分散性 纳米半导体 纳米二氧化钛
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聚3,4-乙烯二氧噻吩/碳纳米管/TiO2电化学传感器构建及其在细胞检测中的应用 认领 引用
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作者 厉婷 徐加泉 黄卫华 《分析科学学报》 CAS CSCD 北大核心 2020年第5期701-709,共9页
本文结合TiO2优良的光催化降解性能,以及电化学传感材料PEDOT/PSS和CNTs的优良电化学性能及抗污染性能,采用一种直接拉制技术,简便、快捷地制备了PEDOT/CNTs/TiO2复合纤维,其长度可达10cm,直径最小可至3μm。在此基础上,分别构建了兼具... 本文结合TiO2优良的光催化降解性能,以及电化学传感材料PEDOT/PSS和CNTs的优良电化学性能及抗污染性能,采用一种直接拉制技术,简便、快捷地制备了PEDOT/CNTs/TiO2复合纤维,其长度可达10cm,直径最小可至3μm。在此基础上,分别构建了兼具抗污染性能和光致清洁性能的平面微米线电极及单根微米线电极,用于监测内皮细胞释放NO。结果显示,所制电极具有良好的电化学性能,对NO的检出限可达4nmol/mL;在培养基中浸泡34h后,其电化学性能无明显变化,表现出良好的抗污染性能;在彻底污染后(无电化学响应),经紫外光照30min后,其电化学性能可恢复至初始的30%,表现出一定的光致清洁能力。 展开更多
关键词 电化学传感器 光致清洁 PEDOT/CNTs/TiO_2纤维 抗污染 一氧化氮
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纳米ZnO·Bi_2O_3·La_2O_3复合粉体的Sol-Gel法制备工艺与表征 认领 引用 被引量：1
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作者 邵义 李艳芝 +1 位作者 郭占英 赵孝江 《沈阳工业大学学报》 EI CAS 2009年第4期379-382,387,共4页
纳米ZnO作为应用前景意义很大的半导体材料,有较高的研究价值,为此以Zn(AC)2.2H2O、La2O3、Bi(NO3)3.5H2O为主要原料,柠檬酸为络合剂,利用溶胶-凝胶法制备了纳米ZnO.Bi2O3.La2O3复合粉体.通过实验研究制备纳米ZnO.Bi2O3.La2O3复合粉体... 纳米ZnO作为应用前景意义很大的半导体材料,有较高的研究价值,为此以Zn(AC)2.2H2O、La2O3、Bi(NO3)3.5H2O为主要原料,柠檬酸为络合剂,利用溶胶-凝胶法制备了纳米ZnO.Bi2O3.La2O3复合粉体.通过实验研究制备纳米ZnO.Bi2O3.La2O3复合粉体的最佳工艺条件,并利用x-射线衍射(XRD)、透射电镜(TEM)、比表面积测定对制备的复合粉体性能进行表征.结果表明,在最佳工艺条件下,干凝胶在600℃条件下煅烧2 h,得到了粒径分布约为54 nm、比表面积为120.77 m2/g的纳米ZnO.Bi2O3.La2O3复合粉体,说明溶胶-凝胶法制备纳米ZnO有较好的结果. 展开更多
关键词 溶胶-凝胶 工艺条件 纳米 复合粉体 性能表征 氧化锌 柠檬酸 醋酸锌
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Electrochemical Performance of PEO10LiX-Li_2TiO_3 Composite Polymer Electrolytes 认领 引用 被引量：1
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作者 路密 史鹏飞 《Chinese Journal of Chemistry》 SCIE CAS 2004年第1期47-50,共4页
The conductivities of polyethylene oxide (PEO)-based polymer electrolytes (PE) can be improved by the addition of inorganic inert powder. The composite polymer electrolytes (CPE) PEO10LiX (X=4ClO- or 322N(CFSO)-)-Li2T... The conductivities of polyethylene oxide (PEO)-based polymer electrolytes (PE) can be improved by the addition of inorganic inert powder. The composite polymer electrolytes (CPE) PEO10LiX (X=4ClO- or 322N(CFSO)-)-Li2TiO3 were prepared by solution casting with inorganic solid electrolyte Li2TiO3 powder as a filler. Results showed that the conductivities of PEO10LiClO4-3wt% Li2TiO3 and PEO10LiN(CF3SO2)2-10wt% Li2TiO3 at 30 ℃ were 8.6×10-6 and 5.6×10-5 S·cm-1, respectively. The conductivities of CPE increased with the decrease of filler抯 particle size. The ionic conduction mechanism analysis showed that there may be three conduction routes in the CPE, i.e., PEO bulk, polymer-filler interface and Li2TiO3 crystal. 展开更多
关键词 rechargeable lithium batteries polymer electrolyte composite polymer electrolyte conductivities polyethylene oxide Li2TiO3
Novel Pd/TiO2-Al2O3 Catalysts for Methane Total Oxidation at Low Temperature and Their ^18O-Isotope Exchange Behavior 认领 引用 被引量：6
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作者 林伟 林莉 +3 位作者 朱月香 谢有畅 SCHEURELL, K KEMNITZ, E. 《Chinese Journal of Chemistry》 SCIE CAS 2005年第10期1333-1338,共6页
Pd supported on TiO2-Al2O3 binary oxides prepared by coprecipitation method has been investigated for the total oxidation of methane. All Pd/TiO2-Al2O3 catalysts show higher activity than Pd/Al2O3 and Pd/TiO2. Among t... Pd supported on TiO2-Al2O3 binary oxides prepared by coprecipitation method has been investigated for the total oxidation of methane. All Pd/TiO2-Al2O3 catalysts show higher activity than Pd/Al2O3 and Pd/TiO2. Among them, Pd/2Ti-3Al with a Ti/Al ratio of 2 to 3 has a T90% of 395 ℃ at a gas hourly mass velocity of 33000 mL/（h＊g）, which is at least 50 ℃ lower than that of Pd supported on single metal oxide Al2O3 or TiO2. The results of TPR and ^180-isotope exchange experiments demonstrated that the excellent activity of Pd/2Ti-3Al was due to its high oxygen mobility and moderate reducibility, which is in accordance with our previous work, XPS results indicated that the dispersion of Pd was not the key factor to influence the catalytic activity. 展开更多
关键词 methane total oxidation palladium TiO2-Al2O3 composite reducibility oxygen mobility
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