Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (01): 151-156.doi: 10.3866/PKU.WHXB201210093

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

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).

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