NDLI: Large improvement of visible-light photocatalytic H2-evolution based on cocatalyst-free Zn0.5Cd0.5S synthesized through a two-step process

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Catalysis Science & Technology Vol - 7 Issue - 3

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Catalysis Science & Technology Vol - 7 Issue - 1

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Large improvement of visible-light photocatalytic H₂-evolution based on cocatalyst-free Zn_0.5Cd_0.5S synthesized through a two-step process

Content Provider	Royal Society of Chemistry (RSC)
Author	Liu, Ya-Nan Zhao, Zhi-Wei Guo, Hong-Li Zhou, Xiao Shen, Cong-Cong Liang, Kuang Xu, An-Wu
Copyright Year	2017
Abstract	Final metal sulfides Zn0.5Cd0.5S (ZnCdS-CH) are synthesized through a coprecipitation process followed by hydrothermal treatment. The morphological, structural and optical properties have been investigated extensively via diverse analytical techniques. The ZnCdS-CH solid solution without noble metal loading is employed in photocatalytic H2 evolution under visible light irradiation (λ ≥ 420 nm) and achieves a superior activity rate of 0.971 mmol h−1, which exceeds those of coprecipitated Zn0.5Cd0.5S (ZnCdS-C) samples by more than 13 times. Moreover, in the recycle test, the ZnCdS-CH photocatalyst shows a stable photocatalytic activity for H2 evolution under long-term visible-light irradiation. Characterization analyses demonstrate that the excellent photocatalytic H2-evolution performance of the ZnCdS-CH sample arises predominantly from the two-step processing procedure of coprecipitation followed by hydrothermal treatment at 200 °C, which makes it possess a hexagonal (wurtzite) structure, good dispersity, enhanced crystallinity, an appropriate band gap, a more negative conduction band, as well as a large number of surface defect states. This finding is of great significance for designing a facile, reproducible and inexpensive method to realise the potential of ZnxCd1−xS ternary metal sulfides in the field of H2 evolution by water splitting.
Starting Page	961
Ending Page	967
Page Count	7
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	7
Issue Number	4
Journal	Catalysis Science & Technology
DOI	10.1039/c6cy02382g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Water splitting Wurtzite Photocatalysis Valence and conduction bands Noble metal Band gap Solid solution Coprecipitation
Content Type	Text
Resource Type	Article
Subject	Catalysis

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