Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (3): 495-501.DOI: 10.1016/S1872-2067(17)62946-2

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Biomolecule-assisted, cost-effective synthesis of a Zn0.9Cd0.1S solid solution for efficient photocatalytic hydrogen production under visible light

Hongmei Zhao, Yunfei He, Meiying Liu, Ran Wang, Yunhe Li, Wansheng You   

  1. School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning, China
  • Received:2017-10-22 Revised:2017-11-19 Online:2018-03-18 Published:2018-03-10
  • Contact: 10.1016/S1872-2067(17)62946-2
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21573100, 21573099) and the Open Project of State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (N-14-04).

Abstract:

A series of alloyed Zn-Cd-S solid solutions with a cubic zinc blende structure were fabricated hydrothermally with the assistance of L-cystine under mild conditions. The products were characterized by XRD, TEM, HRTEM, XPS, UV-vis, and BET techniques, and the photocatalytic performance for the reduction of water to H2 on the solid solutions was evaluated in the presence of S2-/SO32- as hole scavengers under visible light illumination. Among all the samples, the highest photocatalytic activity was achieved over Zn0.9Cd0.1S with a rate of 4.4 mmol h-1 g-1, even without a co-catalyst, which far exceeded that of CdS. Moreover, Zn0.9Cd0.1S displayed excellent anti-photocorrosion properties during the photoreduction of water into H2. The enhancement in the photocatalytic performance was mainly attributed to the efficient charge transfer in the Zn0.9Cd0.1 alloyed structure and the high surface area. This work provides a simple, cost-effective and green technique, which can be generalized as a rational preparation route for the large-scale fabrication of metal sulfide photocatalysts.

Key words: Zn0.9Cd0.1S, L-cystine, Green synthesis, Photocatalytic hydrogen production