二氧化钛纳米棒自组装微米球的制备、性能及其生长机理  

Synthesis,Growth Mechanism and Photocatalytic Activities of Microspheres Self-assembled by Titania Nanorods

作　　者：黄祥平[1] 王昭[1] 张昌远[1] 毛峰[1] 魏慧丽[1] 

机构地区：[1]三峡大学理学院物理系,湖北宜昌443000

出　　处：《材料科学与工程学报》2009年第5期709-712,共4页Journal of Materials Science and Engineering

基　　金：湖北省教育厅重大资助项目(2004Z002);三峡大学博士科研启动基金资助项目(5320703)

摘　　要：用水热法在180℃一步合成了TiO2纳米棒自组装微米球,并对其光催化性能和形成机理进行了分析。采用X-射线衍射(XRD),扫描电镜(SEM),透射电镜(TEM)和氮气吸附(BET)对催化剂的物相、颗粒粒径及比表面积进行了表征,结果显示产物为金红石型结构,呈纳米棒自组装微米球形貌,微米球中纳米棒的直径约为30纳米。氮气吸附解附实验表明微米球比表面积为31.2m2/g,介孔的尺寸为3.88nm。催化实验显示其在可见光下的催化能力优于P25。At low temperature（180℃）,the TiO2 microspheres were synthesized via a one step route using TiCl3 as precursor.Its photocatalytic activities and growth mechanism were discussed.Microspheres were characterized on crystal structure,particle size,and specific surface area by X-ray diffractometry（XRD）, scanning electron microscopy（SEM）,transmission electron microscopy（TEM） and BET analysis.The results show that the product is rutile microspheres and selfassembled by nanorods with diameter about 30 nm.Nitrogen sorption-desorption test reveals that the specific surface area is SBET=31.2m^2/g and the pore size is 3.88nm.Under visible light,the photocatalytic performance of the microspheres on degradation of RhB is more excellent than that of P25.

关 键 词：二氧化钛 自组装 微米球 生长机理 光催化 

分 类 号：O614.41[理学—无机化学]