Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (10): 1926-1935.DOI: 10.1016/S1872-2067(12)60675-5

• Articles • Previous Articles     Next Articles

Photocatalytic hydrogen production under visible-light irradiation on (CuAg)0.15In0.3Zn1.4S2 synthesized by precipitation and calcination

Guangshan Zhanga,b, Wen Zhangc, John C. Crittendenb,d, Yongsheng Chenb, Daisuke Minakatae, Peng Wanga   

  1. a State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China;
    b School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta 30332, Georgia, United States;
    c Department of Civil and Environmental Engineering, New Jersey Institute of Technology, Newark 07102, New Jersey, United States;
    d Brook Byers Institute for Sustainable Systems, Georgia Institute of Technology, Atlanta 30332, Georgia, United States;
    e Department of Civil and Environmental Engineering, Michigan Technological University, Houghton 49931, MI, United States
  • Received:2013-05-29 Revised:2013-08-08 Online:2013-09-29 Published:2013-09-29
  • Contact: Peng Wang
  • Supported by:

    This work was supported by the Brook Byers Institute for Sustainable Systems, Hightower Chair, and the Georgia Research Alliance at the Georgia Institute of Technology, and Science Fund for Creative Research Groups of the National Natural Science Foundation of China (51121062).

Abstract:

This study investigates the photocatalytic hydrogen production over nanosized (CuAg)0.15In0.3Zn1.4S2 photocatalysts prepared via precipitation and calcination. The photocatalysts were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, N2 adsorption-desorption, and UV-Vis absorption spectroscopy. The results show that calcination temperature and time significantly influence the crystallinity, specific surface area, and visible-light absorption capacity of the photocatalysts. The photocatalyst activity was studied under visible-light irradiation with KI as the electron donor. The results indicate that the (CuAg)0.15In0.3Zn1.4S2 photocatalyst prepared at a calcination temperature of 600 ℃ for 5 h yields the highest photocatalytic activity (H2 production rate of 1750 μmol g-1 h-1 and quantum yield of 12.8% at 420±5 nm), approximately 6 times larger than that of catalysts prepared without thermal treatment.

Key words: Photocatalyst, Multicomponent metal sufide, Hydrogen production, Calcination, Photocatalytic activity, Visible light