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| Fabrication and Photocatalysis of TiO2 Flower-like Nanostructures |
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Yan-zong Wang1,2, Xun Hong1,2, Guan-zhong Wang*1,2, Xiao-ping Wang1,2
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1.Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China;2.Department of Physics, University of Science and Technology of China, Hefei 230026, China
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| 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) |
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| TiO2花状纳米结构的制备及光催化性能 |
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王延宗 1,2, 洪勋 1,2, 王冠中1,2, 王晓平1,2
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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
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| 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 |
| 分类号: |