可移动金核的二氧化钛空心球合成及光催化性质(英文)  

Hollow Spheres with Moveable Au Nanoparticles in Core and Titanium Oxide Shell: Synthesis and Photocatalytic Activity

作　　者：闵宇霖[1] 万勇[1] 刘蓉[1] 俞书宏[1] 

机构地区：[1]合肥微尺度科学国家实验室纳米材料与纳米化学部

出　　处：《无机化学学报》2008年第7期1172-1176,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.50732006,20325104,20621061,20671085);中国科学院“引进国外杰出人才计划”;教育部长江学者奖励计划;教育部博士点基金;安徽省人才开发基金(No.2006Z027);安徽教育厅重大项目(No.ZD2007004-1)资助

摘　　要：Uniform hollow Au@TiO2 core shell spheres with moveable Au nanoparticles were synthesized based on templating against Au@carbon spheres.The diameter of the shell of the Au@TiO2 spheres could be controlled by adjusting the Ti(OC4H9)4 hydrolyzing reaction time or the ratio of Ti(OC4H9)4 to Au@carbon spheres,and the shell thickness of the core-shell spheres can be varied from 25 nm to 40 nm.As prepared hollow Au@TiO2 core-shell spheres display enhanced photocatalytic activity in the initial stage of photocatalytic degradation of methylene blue compared with pure hollow TiO2 spheres and the commercial photocatalyst TiO2(P-25).Uniform hollow Au@TiO2 core shell spheres with moveable Au nanoparticles were synthesized based on templating against Au@carbon spheres.The diameter of the shell of the Au@TiO2 spheres could be controlled by adjusting the Ti（OC4H9）4 hydrolyzing reaction time or the ratio of Ti（OC4H9）4 to Au@carbon spheres,and the shell thickness of the core-shell spheres can be varied from 25 nm to 40 nm.As prepared hollow Au@TiO2 core-shell spheres display enhanced photocatalytic activity in the initial stage of photocatalytic degradation of methylene blue compared with pure hollow TiO2 spheres and the commercial photocatalyst TiO2（P-25）.

关 键 词：核壳结构 二氧化钛 光催化 空心球 

分 类 号：O614.411[理学—无机化学] O614.123[理学—化学]