期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 41, 期 14, 页码 5908-5915出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.02.146
关键词
H-2 evolution; CdS; Red phosphorus; Composite photocatalysts
资金
- National Natural Science Foundation of China [21376102]
- Natural Science Foundation of Guangdong Province, China [S2013010012199]
Novel red phosphorus-CdS (P-CdS) composite photocatalysts were successfully prepared through a facile and fast precipitation method. The samples were then characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) and photoluminescence emission spectroscopy (PL). The photocatalytic activity was evaluated by H-2 generation in the aqueous solution containing Na2S/Na2SO3 as hole scavengers under visible light irradiation (lambda >= 400 nm). The results show the optimal P molar ratio was 10 mol% and the corresponding H-2 production rate reached 923 umol h(-1) g(-1), which is about 2.53 times higher than that of CdS sample. Meanwhile, the composite photocatalysts show favorable photostability. The enhanced photocatalytic activity can be attributed to the highly effective charge separation on P-CdS hybrids as confirmed by PL result. Also, a possible photocatalytic mechanism of the P-CdS composites is proposed and discussed in detail. Copyright (C) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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