›› 2017, Vol. 2 ›› Issue (12): 59-62.

• 化学 • 上一篇    下一篇

Bi掺杂的SrTiO3的制备及其可见光催化活性研究

  

  1. (大理大学药学与化学学院,云南大理671000)
  • 收稿日期:2017-10-24 出版日期:2017-12-15 发布日期:2017-12-15
  • 通讯作者: 严亚,教授,博士.
  • 作者简介:张其娣,硕士研究生,主要从事药剂学研究.
  • 基金资助:
    国家自然科学基金资助项目(21563003;21403096)

A Study on the Synthesis and Visible Light Photocatalytic Activity of Bismuth-doped Strontium Titanate

  1. (College of Pharmacy and Chemistry, Dali University, Dali, Yunnan 671000, China)
  • Received:2017-10-24 Online:2017-12-15 Published:2017-12-15

摘要: 目的:探讨铋(Bi)掺杂的钛酸锶(SrTiO3)的可见光催化活性。方法:采用化学共沉淀法合成了不同掺Bi比例的SrTiO3纳米粉体(Bi-SrTiO3),通过X射线光电子能谱(XPS)、X射线粉末衍射仪(XRD)、高分辨透射电镜(HRTEM)和固体紫外-可见漫反射光谱(UV-Vis DRS)对催化剂进行了结构、形貌和光谱性质的表征。以罗丹明B(RhB)为模型污染物,1 000 W卤钨灯为光源(用滤光片滤去波长小于420 nm的光),考察Bi的不同掺杂量对SrTiO3的可见光催化活性的影响。结果:适量的Bi掺杂到SrTiO3中能提高SrTiO3的可见光催化活性,其中Bi的掺杂量为3%时Bi-SrTiO3具有最高的可见光催化活性。结论:Bi的掺杂能扩大SrTiO3的可见光响应范围,显著提高SrTiO3的可见光催化活性。

关键词: 共沉淀法, 铋, 钛酸锶, 可见光催化活性, 罗丹明B

Abstract: Objective: To study the visible light photocatalytic activity of Bi-doped SrTiO3. Methods: Bismuth(Bi)doped strontium titanate(SrTiO3)nanometer powders with different ratios of Bi were synthesized by chemical coprecipitation method. The structure of the photocatalytic catalysts was characterized by XPS, XRD, HRTEM, and UV-vis DRS. When Rhodamine B(RhB)was used as the model pollutant, and 1 000 W halogen lamp(λ >420 nm)as visible light source, the effects of different doping amount of Bi on the photocatalytic activity of SrTiO3 was investigated. Results: An appropriate amount of Bi doping to SrTiO3 can improve the visible light photocatalytic activity of SrTiO3, and 3 wt. % Bi-SrTiO3 has the highest visible light photocatalytic activity for the degradation of RhB. Conclusion: The doping of Bi can extend the visible light response range, and significantly improve the visible light photocatalytic activity of SrTiO3.

Key words: coprecipitation method, bismuth, strontium titanate, visible light activity, Rhodamine B

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