CdS/Ag2S/g-C3N4 ternary composites with superior photocatalytic performance for hydrogen evolution under visible light irradiation

Autor:	Hongzhu Xing, Shan Zhao, Yan Xu, Yide Han, Junbiao Wu, Xia Zhang
Rok vydání:	2021
Předmět:	Inorganic Chemistry Materials science X-ray photoelectron spectroscopy Scanning electron microscope Photocatalysis Fourier transform infrared spectroscopy Composite material Ternary operation Spectroscopy Powder diffraction Hydrogen production
Zdroj:	Dalton Transactions. 50:3253-3260
ISSN:	1477-9234 1477-9226
DOI:	10.1039/d0dt04292g
Popis:	CdS/Ag2S/g-C3N4 ternary composites as photocatalysts with different amounts of Ag2S were successfully synthesized through a simple chemical deposition method. These photocatalysts were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX) mapping and X-ray photoelectron spectroscopy (XPS) to obtain the information of the structure and composition. Compared with the pure samples and binary composites, CdS/Ag2S/g-C3N4 ternary composites showed enhanced hydrogen production activities, and the maximum hydrogen production rate of CdS/Ag2S(2%)/CN is about 1020.54 μmol g-1 h-1 in Na2S-Na2SO3 solution. Based on the photoluminescence and electrochemical results, the improved photocatalytic activity could be attributed not only to the synergic effect of ternary components in the composite, but also to the introduction of Ag2S that provided abundant active sites for H2 production. A possible mechanism was investigated in detail.
Databáze:	OpenAIRE
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