Facile fabrication of novel red phosphorus-CdS composite photocatalysts for H2 evolution under visible light irradiation

被引：58
|
作者：
Shi, Zhisheng [1 ]
Dong, Xinfa [1 ]
Dang, Haifeng [2 ]
机构：
[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China
[2] Dongguan Univ Technol, Coll Chem & Environm Engn, Dongguan 523808, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2016年 / 41卷 / 14期
基金：
中国国家自然科学基金;
关键词：
H-2; evolution; CdS; Red phosphorus; Composite photocatalysts; HYDROGEN-PRODUCTION; QUANTUM EFFICIENCY; WATER; NANOPARTICLES; GENERATION; GRAPHENE;
D O I：
10.1016/j.ijhydene.2016.02.146
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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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页码：5908 / 5915
页数：8
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