Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (5): 1581.doi: 10.7503/cjcu20210035

• Article • Previous Articles     Next Articles

Ordered Mesoporous NiS-loaded CdS with Ultrathin Frameworks for Efficient Photocatalytic H2 Production

YANG Xiaomei, WU Qiang, GUO Ru, YE Kaibo, XUE Ping(), WANG Xiaozhong, LAI Xiaoyong()   

  1. State Key Laboratory of High?Efficiency Utilization of Coal and Green Chemical Engineering,School of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China
  • Received:2021-01-18 Online:2021-05-10 Published:2021-05-08
  • Contact: XUE Ping,LAI Xiaoyong E-mail:ping@nxu.edu.cn;xylai@nxu.edu.cn
  • Supported by:
    This paper is supported by the National Natural Science Foundation of China(52062043)

Abstract:

An ordered mesoporous cadmium sulfide(CdS) photocatalyst has been synthesized through the nanocasting method using ordered mesoporous silica as hard template. The resultant ordered mesoporous CdS photocatalyst is constructed with gyroid ultrathin frameworks of ca. 5 nm and possesses a large specific surface area of 238 m2/g, which could efficiently reduce the migration distance of photo-generated charges from bulk to surface in photocatalysis and provide more active sites for photocatalytic reaction, thus resulting an enhanced photocatalytic performance. Furthermore, nickel sulfide as a cocatalyst was loaded on the surface of ordered mesoporous CdS by the in?situ chemical deposition, resulting in a series of ordered mesoporous NiS-loaded CdS nanocomposite photocatalysts. Their photocatalytic performances for H2 production in water were evalua-ted under visible light irradiation(λ≥420 nm) and a high photocatalytic H2 evolution rate of 3.84 mmol?h-1?g-1 could be reached after loading an optimal amount of NiS, which is 17.5 times that(0.22 mmol?h-1?g-1) for commercial CdS after loading the same amount of NiS.

Key words: Mesoporous photocatalyst, Ultrathin framework, CdS, NiS, H2 production

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