钒掺杂对TiO_2晶型转变的影响  

Effect of V doping on the crystal transformation of TiO_2

作　　者：朱振峰[1] 张建权[1,2] 李军奇[1] 杨冬[1] 孙洪军[1] 郭丽英[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021 [2]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《化工新型材料》2010年第2期52-54,共3页New Chemical Materials

基　　金：国家自然科学基金(50772064);陕西科技大学研究生创新基金资助

摘　　要：以钛酸四丁酯为原料,利用溶胶-凝胶法制备了纯TiO2粉体和钒(V)掺杂的TiO2粉体,并利用TG-DSC,XRD,SEM等方法对样品进行了表征。结果表明:V的掺杂促进了TiO2粒子由锐钛矿型向金红石型的转变,并使晶型转变温度范围变窄;TiO2晶粒的尺寸随焙烧温度的升高逐渐长大,随掺杂量的增加逐渐减小。TiO2粉体粒子在锐钛矿型状态下,颗粒分散均匀,并且无明显团聚现象。因此,V掺杂TiO2具有良好的光催化活性。With Ti（OBu）4 as raw material,the pure and V doped TiO2 powder were prepared by a sol-gel method and characterized by TG-DSC,XRD,SEM and EDS.The results showed that the doped V promoted the process of phase transition of TiO2 particles from anatase to rutile,and the range of crystal transformation temperature became narrow.The crystallites growed larger with the calcination temperature raised,but became smaller with the the doping increased.TiO2 particles were well dispersed in the state of anatase,with no agglomerates observed.Therefore,V dpoed TiO2 exhibited a good photo catalytic activity.

关 键 词：掺杂 锐钛矿 金红石 晶型转变 晶粒尺寸 

分 类 号：O614.411[理学—无机化学]