Fabrication and Photocatalysis of TiO2 Flower-like Nanostructures  

作　　者：王延宗 洪勋 王冠中[1,2] 王晓平 

机构地区：[1]中国科学技术大学结构分析开放实验室,合肥230026 [2]中国科学技术大学物理系,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2006年第6期559-562,共4页化学物理学报（英文）

基　　金：supported by the National Natural Science Foundation of China(No.10574122 and No.60376008).

摘　　要：TiO2 nanostructures were fabricated by a reaction of Ti foils in H2O2 solution at mild temperature, Porous TiO2 nanostructurcs, well adhered to Ti foil surfaces, were formed at 80 ℃ in 10 rain, and then flower- like and rod nanostructures formed in succession after a longer reaction time. Samples prepared at 80 ℃ for 4 h arc amorphous, and anatase-dominated crystal phase emerged in the sample prepared for as long as 10 h. Almost pure anatase phase were obtained in TiO2 nanostructures by annealing the samples at a temperature of 300 ℃. Photoeatalysis of the TiO2 nanostructures was characterized by the degradation of RhB dye molecules in an aqueous solution exposed to ultraviolet light. Results show a 7 cm^2 annealed TiO2 flower-like nanostrueture having the degradation rate of RhB as fast as 29.8 times that of the dye solution exposed to ultraviolet light alone.

关 键 词：TiO2 nanostructure PHOTODEGRADATION RhB solution 

分 类 号：O[理学]