Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (1): 153-158.doi: 10.3866/PKU.WHXB201411175

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Preparation of NiS-Modified Cd1-xZnxS by a Hydrothermal Method and Its Use for the Efficient Photocatalytic H2 Evolution

LIN Cai-Fang, CHEN Xiao-Ping, CHEN Shu, SHANGGUAN Wen-Feng   

  1. Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
  • Received:2014-10-08 Revised:2014-11-17 Published:2014-12-25
  • Contact: SHANGGUAN Wen-Feng E-mail:shangguan@sjtu.edu.cn
  • Supported by:

    The project was supported by the National High Technology Research and Development Programof China (863) (2012AA051501) and International Cooperation Project of Shanghai Municipal Science and Technology Commission, China (12160705700).

Abstract:

NiS-modified Cd1-xZnxS has been prepared using a simple hydrothermal method. Notably, the H2 evolution rate of 0.5% (y, molar fraction) NiS/Cd0.3Zn0.7S(1840 μmol·h-1) was found to be 2.1- and 1.3-fold greater than those of Cd0.3Zn0.7S(884 μmol·h-1) and 0.5% (w, mass fraction) Pt (1390 μmol·h-1), respectively, when 0.35 mol·L-1 Na2SO3 and 0.25 mol·L-1 Na2Swere used as sacrificial agents. The apparent quantumefficiency of 0.5% (y) NiS/Cd0.3Zn0.7S at 420 nm was 36.8%. The characterization of this material by X-ray diffraction (XRD), ultraviolet-visible diffuse reflection spectroscopy (UV-Vis DRS), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) showed that the NiS particles provided the active sites required for H2 evolution and transferring the photo generated electrons, and therefore enhanced the photocatalytic activity of the catalyst towards H2 production.

Key words: Cd1-xZnxS, NiS, Hydrothermal method, Photocatalytic activity, Hydrogen production

MSC2000: 

  • O643