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Fabrication and Photocatalysis of TiO2 Flower-like Nanostructures
Yan-zong Wang,Xun Hong,Guan-zhong Wang*,Xiao-ping Wang
Author NameAffiliation
Yan-zong Wang Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China; Department of Physics, University of Science and Technology of China, Hefei 230026, China 
Xun Hong Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China; Department of Physics, University of Science and Technology of China, Hefei 230026, China 
Guan-zhong Wang* Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China; Department of Physics, University of Science and Technology of China, Hefei 230026, China 
Xiao-ping Wang Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China; Department of Physics, University of Science and Technology of China, Hefei 230026, China 
Abstract:
TiO2 nanostructures were fabricated by a reaction of Ti foils in H2O2 solution at mild temperature. Porous TiO2 nanostructures, well-adhered to Ti foil surfaces, were formed at 80 ±C in 10 min, and then flower- like and rod nanostructures formed in succession after a longer reaction time. Samples prepared at 80 ±C for 4 h are 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 ±C. Photocatalysis 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 cm2 annealed TiO2 flower-like nanostructure having the degradation rate of RhB as fast as 29.8 times that of the dye solution exposed to ultraviolet light alone.
Key words:  TiO2 nanostructure, Photodegradation, RhB solution
FundProject:supported by the National Natural Science Foundation of China (No.10574122 and No.60376008)
TiO2花状纳米结构的制备及光催化性能
王延宗 ,洪勋 ,王冠中,王晓平
摘要:
用Ti片和H2O2在较低的温度下通过控制反应时间制备了不同 形貌的纳米TiO2. 在80 ±C下反应10 min得到了和Ti片黏附较好的 多孔纳米结构,延长反应时间先后得到了类花状和类棒状纳米结构. 在80 ±C下反应4 h得到的纳米结构样品为非晶态,而反应10 h制备出 以锐钛矿相为主的结晶态纳米结构. 通过300 ±C退火得到的几乎是纯 锐钛矿相的纳米TiO2. 用紫外光照射降解RhB溶液的方法研究了纳 米TiO2的光催化性能. 结果表明7 cm2的退火后的类花状纳米TiO2降 解染料分子的光催化效率
关键词:  TiO2,花状纳米结构,光催化性能
DOI:10.1360/cjcp2006.19(6).559.4
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