Photocatalytic hydrogen production under visible-light irradiation on (CuAg)0.15In0.3Zn1.4S2 synthesized by precipitation and calcination

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This study investigates the photocatalytic hydrogen production over nanosized (CuAg)0.15In0.3Zn1.4S2 photocatalysts prepared via precipitation and calcination. The photocatalysts were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, N2 adsorption-desorption, and UV-Vis absorption spectroscopy. The results show that calcination temperature and time significantly influence the crystallinity, specific surface area, and visible-light absorption capacity of the photocatalysts. The photocatalyst activity was studied under visible-light irradiation with KI as the electron donor. The results indicate that the (CuAg)0.15In0.3Zn1.4S2 photocatalyst prepared at a calcination temperature of 600 °C for 5 h yields the highest photocatalytic activity (H2 production rate of 1750 μmol g−1 h−1 and quantum yield of 12.8% at 420 ± 5 nm), approximately 6 times larger than that of catalysts prepared without thermal treatment.

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Copyright © 2013 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved. Publisher's version of record: https://doi.org/10.1016/S1872-2067(12)60675-5

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Chinese Journal of Catalysis