节点文献
掺钒TiO2纳米粉体的制备及性能
PREPARATION AND PROPERTIES OF V+5/TiO2 NANOSCALE POWDERS
【摘要】 以 TiCl13为源物质.通过添加强氧化剂,用溶胶-凝胶法制备掺杂 V+5的TiO2纳米粉末.研究了该材料的结构、晶粒尺寸和分散性在不同掺钒量和烧结时间(400℃)条件下的变化规律.结果表明,V+5在 TiO2中形成替位式掺杂,使锐钛矿相结构产生微应力,不仅促进其向金红石相转变,而且使大晶粒扭曲畸变形成小晶粒.
【Abstract】 Nanoscale TiO2 powders doping with vanadium by oxidizing sol-gel process were prepared using TiCl3 as a source matter. The influence of vanadium on the phase transition was studied, the changes in the crystal size and microstrain distributions obtained at 400 ℃were analyzed. The results show that the substitutes of V+5 for Ti(+4) in the anatase structure cause distortions, formation of the rutile phase and decrease of crystal size. V+5/TiO2 powders with high dispersion, surface area and activity were obtained.
【关键词】 氧化法;
掺钒二氧化钛;
纳米材料;
相变;
【Key words】 oxidizing sol-gel process; V+5/TiO2; nanoscale materials; phase transformation;
【Key words】 oxidizing sol-gel process; V+5/TiO2; nanoscale materials; phase transformation;
【基金】 福建省科技三项基金资助项目 K20012.
- 【文献出处】 材料研究学报 ,Chinese Journal of Material Research , 编辑部邮箱 ,2001年05期
- 【分类号】TB383
- 【被引频次】41
- 【下载频次】259