28 March 2017 Efficient and stable photocatalytic hydrogen evolution from alkaline formaldehyde solution over Cd0.5Zn0.5S solid solution under visible light irradiation
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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.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Shaoqin Peng, Huichen Peng, Min Ding, Yuexiang Li, "Efficient and stable photocatalytic hydrogen evolution from alkaline formaldehyde solution over Cd0.5Zn0.5S solid solution under visible light irradiation," Journal of Photonics for Energy 7(1), 016503 (28 March 2017). https://doi.org/10.1117/1.JPE.7.016503 . Submission: Received: 2 January 2017; Accepted: 7 March 2017
Received: 2 January 2017; Accepted: 7 March 2017; Published: 28 March 2017
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