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Journal of Photonics for Energy

Efficient and stable photocatalytic hydrogen evolution from alkaline formaldehyde solution over Cd0.5Zn0.5S solid solution under visible light irradiation
Author(s): Shaoqin Peng; Huichen Peng; Min Ding; Yuexiang Li
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Paper Abstract

Cd 0.5 Zn 0.5 S photocatalyst was prepared by a hydrothermal method and characterized by x-ray diffraction and UV–Vis absorption spectroscope techniques. Using the pollutant formaldehyde as an electron donor, the photocatalytic H 2 evolution from water splitting under visible light ( λ 420    nm ) irradiation was examined. It was found that formaldehyde can notably enhance photocatalytic H 2 evolution with its simultaneous degradation. An alkaline condition also was beneficial to the photocatalytic H 2 evolution. The effect of formaldehyde concentration on the H 2 evolution rate was consistent with a Langmuir–Hinshelwood kinetic model. The stability test indicated that the catalyst was rather stable during 20-h irradiation and the average apparent quantum yield amounted to 3.1% under visible light irradiation ( λ 420    nm ) and 25.7% at 420 nm even without any cocatalysts. The possible mechanism was discussed.

Paper Details

Date Published: 28 March 2017
PDF: 12 pages
J. Photon. Energy 7(1) 016503 doi: 10.1117/1.JPE.7.016503
Published in: Journal of Photonics for Energy Volume 7, Issue 1
Show Author Affiliations
Shaoqin Peng, Nanchang Univ. (China)
Huichen Peng, Nanchang Univ. (China)
Min Ding, Nanchang Univ. (China)
Yuexiang Li, Nanchang Univ. (China)

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