Zn掺杂TiO2的光催化性能研究
Effect of Zn Doping on the Photocatalytic Activity of TiO2

作者: 余大凤 , 刘 浩 :湖北大学物理与电子科学学院,武汉; 鲍钰文 , 高 云 , 夏晓红 :湖北大学材料科学与工程学院,武汉;

关键词: Zn掺杂TiO2溶胶凝胶法光催性能Zn Doped TiO2 Sol-Gel Method Photocatalytical Activity

摘要:
以钛酸四丁酯为钛源,醋酸锌为锌源用溶胶凝胶法制备了不同比例Zn掺杂TiO2纳米颗粒,掺杂比例为0 at%~10 at%。用X射线衍射(XRD)、透射电镜(TEM)、能谱分析(EDS)、紫外可见光谱(UV-Vis)等研究手段对所制备的Zn掺杂TiO2纳米颗粒进行分析,并对样品的光催化活性进行了研究。结果显示400退火的样品均为锐钛矿相TiO2,没有ZnO的衍射峰出现,EDS分析结果显示Zn离子存在于TiO2中,说明Zn离子成功掺杂进入TiO2晶格。通过TEM图像和谢乐公式计算可知,Zn掺杂TiO2的平均晶粒尺寸为6~7 nm,掺杂比例为1%的样品光催化降解亚甲基蓝染料效果最好

Abstract:
TiO2 nanocrystalline powders with various Zn doping levels from 0 at% to 10 at% were synthesized via sol-gel method with Tetrabutyl orthotitanate (TBOT) and zinc acetate as Ti and Zn source. The samples were characterized by XRD, TEM, EDS and diffuse absorption spectrum. The effect of Zn doping on optical and photocatalytical properties of TiO2 was systematically investigated. XRD results show that all the prepared powders were Anatase TiO2, no ZnO was found when the samples were annealed at 400˚C. EDS analysis confirmed the existence of Zn in the samples. It suggests that Zn was successfully doped into TiO2. Average particle size of the prepared Zn-TiO2 powders was about 6 - 7 nm obtained from TEM measurement and Scherer Equation calculation. The nano size powders were used to catalytically decompose methylene blue, and the sample doped with 1 at% Zn showed the best photocatalytic activity, better than that of pure TiO2.

文章引用: 余大凤 , 刘 浩 , 鲍钰文 , 高 云 , 夏晓红 (2014) Zn掺杂TiO2的光催化性能研究。 纳米技术, 4, 12-15. doi: 10.12677/NAT.2014.41003

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