物理化学学报 >> 2013, Vol. 29 >> Issue (01): 151-156.doi: 10.3866/PKU.WHXB201210093

催化和表面科学 上一篇    下一篇

Co掺杂提高ZnIn2S4光催化剂可见光下的产氢性能

袁文辉1, 刘晓晨1, 李莉2   

  1. 1 华南理工大学化学与化工学院, 广州 510640;
    2 华南理工大学环境科学与工程学院, 广州 510640
  • 收稿日期:2012-08-09 修回日期:2012-10-08 发布日期:2012-12-14
  • 通讯作者: 袁文辉 E-mail:cewhyuan@scut.edu.cn
  • 基金资助:

    国家自然科学基金(20976057)资助项目

Improving Photocatalytic Performance for Hydrogen Generation over Co-Doped ZnIn2S4 under Visible Light

YUAN Wen-Hui1, LIU Xiao-Chen1, LI Li2   

  1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, P.R.China;
    2 College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, P.R.China
  • Received:2012-08-09 Revised:2012-10-08 Published:2012-12-14
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20976057).

摘要:

采用溶剂热法制备出Co掺杂的ZnIn2S4催化剂.用X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、紫外-可见(UV-Vis)漫反射光谱等技术对其进行了表征. XRD 和XPS结果表明, Co成功地掺杂到ZnIn2S4晶格内. 随着Co掺杂量增加, 样品的吸收边发生红移, 同时ZnIn2S4的微球形态会遭到破坏. 光催化反应实验结果表明Co2+掺杂提高了ZnIn2S4光催化性能, 掺杂量为0.3%(w)时表现出最佳催化性能. 并对可能的催化机理进行了讨论.

关键词: 光催化剂, 掺杂, 可见光, 制氢, 分解水

Abstract:

A series of Co-doped ZnIn2S4 photocatalysts were prepared via a solvothermal synthesis method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-visible (UV-Vis) diffuse reflectance spectroscopy. The results indicated that the Co was successfully incorporated into the ZnIn2S4 lattice as confirmed by XRD and XPS. With increasing Co concentration, the absorption edge of the samples shifted to longer wavelength, while the morphology of ZnIn2S4 was gradually destroyed. Photocatalytic results demonstrated that Co2+ doping could greatly enhance the photocatalytic activity of ZnIn2S4. The optimal amount of Co doping for the ZnIn2S4 photocatalyst was 0.3%(w), which displayed the highest photocatalytic activity. The possible photocatalytic mechanism was discussed.

Key words: Photocatalyst, Doping, Visible light, Hydrogen generation, Water splitting

MSC2000: 

  • O643