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, Shaoqin Peng, Huichen Peng, Huichen Peng, Min Ding, Min Ding, Yuexiang Li, 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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