Zn掺杂对 TiO<sub>2</sub>晶相及光催化性能的影响

徐向军; 邢晓轲; 卫世乾

doi:10.3969/j.issn.1003-0972.2015.02.022

Zn掺杂对 TiO₂晶相及光催化性能的影响

1.
银川能源学院石油化工学院，宁夏银川 750001
2.
许昌职业技术学院园林园艺系，河南许昌 461000
3.
许昌学院学报编辑部，河南许昌 461000

基金项目:

国家自然科学基金项目(21001090)

详细信息

作者简介:
徐向军(1974- )，男，宁夏银川人，讲师，硕士，主要从事煤化工煤质检测研究．

中图分类号: O643
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出版历程
- 收稿日期: 2014-11-02
- 发布日期: 2015-04-09

Effect of TiO₂Doping by Zn on Crystalline Phase and Photocatalytic Activity

1.
College of Petrochemical Engineering, Yinchuan Energy Institute, Yinchuan 750001, China
2.
Department of Horticulture and Landscape, Xuchang Vocational and Technical College, Xuchang 461000, China
3.
Editorial Department of Journal of Xuchang University, Xuchang 461000, China

摘要

摘要: 采用改进的溶胶- 凝胶法制备ZnO- TiO₂复合催化剂，通过X射线衍射(XＲD)、紫外- 可见漫反射(UV- Vis DＲS)对其微晶结构和光吸收性能进行表征．以甲基橙作为模拟降解物，结果表明，改变水和乙醇的含量以控制溶胶向凝胶陈化的时间影响ZnO- TiO₂的催化活性．当 n(Zn)∶ n(Ti) 为 3∶ 15、煅烧温度为 500 ℃时产物催化效率最好，紫外光照 5h，降解率为96.4%． XＲD 结果显示， ZnO- TiO₂主要以锐钛矿相和立方Zn₂TiO₄晶相存在，且Zn₂TiO₄晶相在 n(Zn)∶ n(Ti)≥3∶ 15时才会出现．紫外- 可见漫反射吸收光谱示，相比单纯TiO₂， ZnO- TiO₂吸收边蓝移．
- ZnO-TiO2 /
- Zn2TiO4 /
- 溶胶-凝胶法 /
- 光催化
Abstract: ZnO- TiO₂ composite catalyst was prepared by modified sol-gel method. The microcrystalline structure and light absorption performance of ZnO- TiO₂ were identified by XRD and UV-Vis DRS, respectively. With methyl orange(MO) as the degradation product, the result showed that the photocatalytic activity of ZnO- TiO₂ was affected by the conversion time from sol to gel controlled by changing the content of water and ethanol. when the ratio of n(Zn)∶n(Ti) was 3∶15 and calcination temperature was 500 ℃, the degradation of MO was up to 96.4% under UV irradiation for 5 h. The XRD results confirmed ZnO- TiO₂ appeared mostly anatase TiO₂and cubic Zn₂TiO₄ phases, and the cubic Zn₂TiO₄ phase was observed only when n(Zn)∶n(Ti)≥3∶15. Compared with the pure TiO₂, the characteristic absorption threshold of ZnO- TiO₂appeared slight blue shift
- ZnO/GO /
- Zn2TiO4 /
- sol-gel method /
- photocatalytic

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参考文献(2)

[1]	杨国强．我国光化学研究的进展及展望［ J］．化学通报， 2011， 74(7):594- 599．
[2]	鲁飞，孟凡明． TiO 2 光催化剂掺杂改性研究进展［ J］．硅酸盐通报， 2011， 30(1):116- 119， 124．