六棱柱和空壳结构锐钛矿相TiO2的过程控制合成  

Controllable Synthesis of Hexagonal Prism and Hollow Anatase TiO_2 Microstructures

作　　者：张森[1,2] 刘春艳[1] 刘云[1] 张志颖[1] 

机构地区：[1]中国科学院理化技术研究所光化学转换与功能材料重点实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《过程工程学报》2008年第6期1233-1236,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20573126);国家重点基础研究发展规划(973)基金资助项目(编号:2007CB613304);中国科学院重要方向项目(编号:KJCX2.YW.H04)

摘　　要：以钛酸四丁酯为钛源,经回流过程合成了草酸氧钛盐微晶,热处理后得到六棱柱和空壳结构的锐钛矿相TiO2.通过调整升温程序控制反应过程的气泡生成过程以影响产物的形貌.无气泡持续产生时,得到六棱柱结构锐钛矿相TiO2;有气泡持续产生时,以气泡为模板,得到空壳结构锐钛矿相TiO2.XRD分析表明,产物草酸氧钛盐和锐钛矿相TiO2均具有较高的纯度和较好的结晶度.SEM和TEM分析表明,六棱柱状TiO2的直径约为2～2.5μm,柱长约为4～6μm,空壳状TiO2的壳厚约为200nm.Anatase TiO2 nanocrystals with hexagonal prism and hollow microstructures were synthesized by heating titanium oxide oxalate hydroxide hydrate microstruetures obtained by refluxing at 90 ℃ using tetrabutyl titanate [Ti（OC4Hg）4] as a precursor. Bubbles produced in the synthesis processes played an important role in the evolution of product morphology. Hexagonal prism and hollow microstructures of the final products formed in the absence and presence of bubbles, respectively. XRD patterns combined with SEM and TEM images indicated that the hexagonal prism TiO2 microstrueture with the average size of 2.5 μm （diameter）×5 μm （length） and the hollow TiO2 microstructure with 200 nm wall thickness were highly crystalline and pure.

关 键 词：钛酸四丁酯 六棱柱结构 空壳结构 TIO2 气泡模板 

分 类 号：TN304.2[电子电信—物理电子学]