期刊
CHEMICAL ENGINEERING JOURNAL
卷 262, 期 -, 页码 146-155出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.09.090
关键词
Photocatalytic hydrogen evolution; Semiconductor photocatalysts; CuS/Cd1-xZnxS; Na2S/Na2SO3
资金
- SB RAS [35]
- Ministry of Education and Science of the Russian Federation [SP-85.2012.1, NSh-1183.2014.3]
Noble-metal-free photocatalysts CuS/Cd0.3Zn0.7S and NizCd0.3Zn0.7S1+z were prepared by a two-step technique. The photocatalysts were characterized by a wide range of experimental techniques: X-ray diffraction, high-resolution transmission electron microscopy, low-temperature N-2 adsorption/ desorption, X-ray photoelectron spectroscopy, and UV vis spectroscopy. The photocatalytic activity was tested in a batch reactor in the hydrogen evolution from aqueous solutions of Na2S/Na2SO3 under visible light irradiation (lambda > 420 nm). The activity of CuS/Cd0.3Zn0.7S photocatalysts was shown to exceed that of NizCd0.3Zn0.7S1+z photocatalysts likely because of the hetero-junctions between CuS and Cd0.3Zn0.7S nanoparticles. The highest photocatalytic activity (3520 mu mol g(-1) h(-1)) was possessed by 1 mol% CuS/ Cd0.3Zn0.7S. A model of the photocatalytic hydrogen production from aqueous solutions of Na2S/Na2SO3 was proposed on the basis of the Langmuir Hinshelwood mechanism. (C) 2014 Elsevier B.V. All rights reserved.
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