金红石型TiO2/ZnTiO3复合材料的制备及其光催化性能
Preparation and Photocatalytic Activity of Rutile-TiO2/ZnTiO3 Composite
- 发光学报 2020年41卷第8期 页码：964-970
- 作者机构：
1.成都大学 机械工程学院, 四川 成都 610106
2.四川新亚无损检测有限公司, 四川 成都 610213
- 作者简介：
[ "朱晓东(1984-), 男, 四川成都人, 硕士, 副教授, 2008年于四川大学获得硕士学位, 主要从事光催化材料的制备与研究。E-mail:xiaodangjia21@126.com" ]
[ "冯威(1981-), 男, 四川成都人, 博士, 教授, 硕士研究生导师, 2011年于四川大学获得博士学位, 主要从事光电功能材料以及粉末冶金材料等方面的研究。E-mail:fengwei233@126.com" ]
- 基金信息：四川省科技厅应用基础研究项目(19YJ0664);成都大学大学生创新计划项目(CDU-CX-2020028);成都大学大学生创新计划项目(CDU-CX-2020034)
DOI：10.37188/fgxb20204108.0964
中图分类号：
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朱晓东, 王娟, 罗宇浩, 等. 金红石型TiO2/ZnTiO3复合材料的制备及其光催化性能[J]. 发光学报, 2020,41(8):964-970.
Xiao-dong ZHU, Juan WANG, Yu-hao LUO, et al. Preparation and Photocatalytic Activity of Rutile-TiO2/ZnTiO3 Composite[J]. Chinese Journal of Luminescence, 2020,41(8):964-970.
朱晓东, 王娟, 罗宇浩, 等. 金红石型TiO2/ZnTiO3复合材料的制备及其光催化性能[J]. 发光学报, 2020,41(8):964-970. DOI： 10.37188/fgxb20204108.0964.
Xiao-dong ZHU, Juan WANG, Yu-hao LUO, et al. Preparation and Photocatalytic Activity of Rutile-TiO2/ZnTiO3 Composite[J]. Chinese Journal of Luminescence, 2020,41(8):964-970. DOI： 10.37188/fgxb20204108.0964.
摘要
采用溶胶-凝胶法制备了金红石型TiO,2,/ZnTiO,3,复合光催化剂，对其进行650℃保温1 h的热处理；通过X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、荧光光谱（PL）对样品进行表征，并以亚甲基蓝（MB）溶液为目标污染物，研究了样品的光催化性能。结果表明，TiO,2,为金红石结构，随着Zn/Ti量比增加，TiO,2,晶粒尺寸减小；当Zn/Ti的量比达到2%时，有新相ZnTiO,3,生成。TiO,2,/ZnTiO,3,（Zn/Ti=8%）展现出最高的光催化活性，这归因于表面羟基含量增加以及形成的TiO,2,/ZnTiO,3,半导体复合结构加快了光生电子与空穴的转移。反应进行90 min后，对MB的降解率达到68.3%，反应速率常数,k,为0.012 min,-1,，分别为纯TiO,2,的1.85倍和3倍。
Abstract
The rutile-TiO,2,/ZnTiO,3, composite photocatalysts were synthesized by a sol-gel method, and were heat treated at 650℃ for 1 h. The obtained samples were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS) and photoluminescence spectra(PL). The photocatalytic performance of samples was studied taking the degradation of methylene blue(MB) as the target reactant. The results show that the crystal structure of TiO,2, is rutile phase and the grain size of TiO,2, decreases with the increasing Zn/Ti molar ratio. ZnTiO,3, forms when the Zn/Ti molar ratio reaches 2%. TiO,2,/ZnTiO,3,(Zn/Ti=8%) exhibits the highest photocatalytic activity, which can be attributed to the increase of surface hydroxyl content and the formation of TiO ,2,/ZnTiO,3, semiconductor composite structure, accelerating the transfer of photogenerated electrons and holes. After 90 minutes of reaction, the degradation rate of MB by TiO,2,/ZnTiO,3,(Zn/Ti=8%) reaches 68.3% and the reaction rate constant ,k, is 0.012 min,-1, which are 1.85 times and 3 times higher than that of pure TiO,2,.
关键词
金红石ZnTiO3光催化性能溶胶凝胶法
Keywords
rutileZnTiO3photocatalytic performancesol-gel
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