Preparation and Photocatalytic Activity of Rutile-TiO<sub>2</sub>/ZnTiO<sub>3</sub> Composite

Xiao-dong ZHU; Juan WANG; Yu-hao LUO; Hua-long DAI; Qiang YU; Wei FENG

doi:10.37188/fgxb20204108.0964

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Preparation and Photocatalytic Activity of Rutile-TiO₂/ZnTiO₃ Composite

Synthesis and Properties of Materials | 更新时间：2020-09-10

- Preparation and Photocatalytic Activity of Rutile-TiO₂/ZnTiO₃ Composite
- Chinese Journal of Luminescence Vol. 41, Issue 8, Pages: 964-970(2020)
- 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：
- 基金信息：
  
  Applied Basic Research Programs of Sichuan Province;Training Program for Innovation
- DOI：10.37188/fgxb20204108.0964
  CLC：
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Xiao-dong ZHU, Juan WANG, Yu-hao LUO, et al. Preparation and Photocatalytic Activity of Rutile-TiO₂/ZnTiO₃ Composite. [J]. Chinese Journal of Luminescence 41(8):964-970(2020)
DOI：

Xiao-dong ZHU, Juan WANG, Yu-hao LUO, et al. Preparation and Photocatalytic Activity of Rutile-TiO₂/ZnTiO₃ Composite. [J]. Chinese Journal of Luminescence 41(8):964-970(2020) 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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Preparation and Photocatalytic Activity of Rutile-TiO2/ZnTiO3 Composite

DOI：10.37188/fgxb20204108.0964

摘要

Abstract

关键词

Keywords

references

Preparation and Photocatalytic Activity of Rutile-TiO₂/ZnTiO₃ Composite