V的自变价对TiO_2晶型结构的影响  

Effect of Doped-V Values on TiO_2 Phase Structure

作　　者：尤玉飞[1] 徐春花[1] 王俊鹏[1] 王镜喆[1] 陈月[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2013年第6期5-8,3,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金/香港合作项目(10831165504);河南省教育厅自然科学基础研究计划基金项目(2010A430006);河南科技大学研究生创新基金项目(CXJJ-Z015)

摘　　要：用溶胶-凝胶法制备V掺杂纳米TiO2粉体。研究温度对纳米粉体晶粒尺寸及晶型转变的影响。用X射线衍射仪对制备的产物进行物相分析。用谢乐公式和Spurr-Myers方法对制备产物的晶粒大小及不同相的相对质量进行分析。研究结果表明:掺杂V能促进TiO2晶粒变大,600℃能明显促进锐钛矿向金红石相转变,而在700℃,当V和Ti摩尔比分别为0.5%、1.0%和1.5%时,反而阻碍了锐钛矿向金红石相转变。Doped-V TiO2 nano-powders were prepared by sol-gel technique and were heated to study the size and phase transformation of TiO2 nano powders. The crystalline structures were characterized by X-ray diffraction( XRD). The relative contents of various phases and grain sizes were analyzed by Spurr-Myers method and Scherer,respectively. The results show that V dopant increases TiO2 grain sizes. The phase transforms from anatase phase to rutile phase at 600 ℃. The transformation is inhibited when the V and Ti molar ratios are 0. 5%,1. 0%,and 1. 5% respectively at 700 ℃.

关 键 词：溶胶-凝胶法 V掺杂 纳米TIO2粉体 相变 

分 类 号：TB383[一般工业技术—材料科学与工程]