Hydrothermal Synthesis and Activity of NiS-PdS/CdS Catalysts for Photocatalytic Hydrogen Evolution under Visible Light Irradiation

Acta Phys Chim Sin >> 2013,Vol.29>> Issue(06)>> 1313-1318 doi: 10.3866/PKU.WHXB201303141 中文摘要

CATALYSIS AND SURFACE SCIENCE

LIN Pei-Bin, YANG Yu, CHEN Wei, GAO Han-Yang, CHEN Xiao-Ping, YUAN Jian, SHANGGUAN Wen-Feng
Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

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To improve the solar energy transformation efficiency, it is necessary to study the efficiency of photocatalysts under visible light irradiation. In this study, the composite photocatalyst NiS-PdS/CdS has been developed using a hydrothermal method from the raw materials cadmium sulfide, palladium chloride, nickel acetate and thiourea. The characteristics of NiS-PdS/CdS were studied by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), and photoluminescence (PL) spectroscopy. In addition, the photocatalytic activities for water splitting were tested using lactic acid as the sacrificial reagent. The results showed that NiS and PdS dispersed well on the surface of CdS. The activity of NiS-PdS/CdS was much higher than that of CdS under visible light irradiation. When the loading amount of NiS and PdS reached 1.5% and 0.41% (w), respectively, NiS-PdS/ CdS showed the highest activity. The H₂ evolution rate increased up to 6556 μmol·h^-1, which was six times higher than that of unloaded CdS and nearly two times higher than that of NiS/CdS. The apparent quantum yield was 47.5% (λ=420 nm). The co-catalysts NiS and PdS prompted the transfer of photogenerated electrons and holes, respectively. Compared with single-loading, co-loading the two co-catalysts could transfer and separate charge carriers more efficiently, resulting in enhancement of the activity for photocatalytic hydrogen production.

Keywords: NiS-PdS/CdS Hydrothermal method Co-loading Photocatalysis Hydrogen energy
Received: 2013-01-07 Accepted: 2013-03-12 Publication Date (Web): 2013-03-14
Corresponding Authors: Email: Shangguan@sjtu.edu.cn

Fund: The project was supported by the National Key Basic Research Program of China (973) (2009CB220000), National High Technology Research and Development Program of China (863) (2012AA051501), and International Cooperation Project of Shanghai Municipal Science and Technology Commission, China (12160705700).

Cite this article: LIN Pei-Bin, YANG Yu, CHEN Wei, GAO Han-Yang, CHEN Xiao-Ping, YUAN Jian, SHANGGUAN Wen-Feng. Hydrothermal Synthesis and Activity of NiS-PdS/CdS Catalysts for Photocatalytic Hydrogen Evolution under Visible Light Irradiation[J]. Acta Phys. -Chim. Sin., 2013,29 (06): 1313-1318. doi: 10.3866/PKU.WHXB201303141

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