Preparation condition optimization and stability of cubic phase CdS in photocatalytic hydrogen production

Cadmium sulphide (CdS) is a promising material for photocatalytic hydrogen production. Compared with hexagonal CdS (h-CdS), the research on cubic CdS (c-CdS) is much less. Especially, detailed studies on the preparation condition optimization and photostability of c-CdS are still insufficient. In th...

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Bibliographic Details
Published in:New journal of chemistry 2021-04, Vol.45 (15), p.6739-6744
Main Authors: Li, Yixian, Yin, Mingcai, Sun, Jiangfan, Liang, Kaiyue, Fan, Yaoting, Li, Zhongjun
Format: Article
Language:English
Subjects:
Cadmium sulfide
Crystal structure
Hydrogen
Hydrogen production
Morphology
Optimization
Photocatalysis
X ray photoelectron spectroscopy
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Summary:Cadmium sulphide (CdS) is a promising material for photocatalytic hydrogen production. Compared with hexagonal CdS (h-CdS), the research on cubic CdS (c-CdS) is much less. Especially, detailed studies on the preparation condition optimization and photostability of c-CdS are still insufficient. In this paper, c-CdS was prepared by a simple precipitation method and characterized by XRD, SEM, TEM and XPS techniques. Firstly, the Cd to S molar ratio and aging time were optimized to find out their influences on the crystal structure, morphology, chemical state and hydrogen production performance of CdS. The c-CdS obtained at a Cd : S ratio of 5 : 8 and an aging time of 6 h (denoted as CdS-8-6) possesses the highest performance of 37.7 μmol h −1 . Secondly and more importantly, cyclic hydrogen production tests were conducted on CdS-8-6 and a series of determinations were carried out on the recovered samples to investigate its photostability during reaction. Cubic CdS prepared with a Cd : S ratio of 5 : 8 and an aging time of 6 h exhibits excellent activity and phase stability.
ISSN:1144-0546
1369-9261
DOI:10.1039/d1nj00558h