Phosphate-assisted hydrothermal synthesis of hexagonal CdS for efficient photocatalytic hydrogen evolution

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > OSSO国家重点实验室

	Phosphate-assisted hydrothermal synthesis of hexagonal CdS for efficient photocatalytic hydrogen evolution
	Li YX(李越湘)1; Tang LF(唐利锋)1; Peng SQ(彭绍琴)1; Li ZC(李增春)1; Lu GX(吕功煊)2
刊名	CrystEngComm
	2012
卷号	14 期号:20 页码:6974-6982
ISSN号	1466-8033
通讯作者	李越湘
英文摘要	Cubic nanocrystalline CdS was hydrothermally transformed into hexagonal CdS in the presence of Na₃PO₄ at 180 °C for 12 h. The as-prepared CdS samples were characterized by transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), BET, electrophoretic analysis, photoluminescence (PL) spectra and UV-Vis absorption spectra techniques. Effects of phosphate concentration, hydrothermal time and Pt loading content were investigated. Their photoactivity was evaluated by hydrogen evolution from aqueous solution containing formic acid as a hole scavenger under visible light (λ ≥ 420 nm) irradiation. Phosphate markedly promotes the phase transformation of CdS from cubic to hexagonal. With 0.050 mol L⁻¹ PO₄³⁻, the formed hexagonal phase content reaches a maximum (82%). The as-prepared CdS with a high percentage of hexagonal phase displays excellent activity for photocatalytic hydrogen evolution. Pt is highly dispersed on CdS so that the Pt content for the effective hydrogen evolution is very low. The CdS loaded with 0.025 wt% Pt shows the maximum activity for the hydrogen evolution. The apparent quantum yield at 420 nm amounts to 21.4%. This work highlights a facile and low-cost method for the preparation of a highly-efficient CdS photocatalyst. The possible mechanisms were discussed.
学科主题	物理化学与绿色催化
收录类别	SCI
资助信息	National Basic Research Program of China (2009CB220003);the National Nature Science Foundation of China (No.21163012);the Natural Science Foundation of the Jiangxi Province (2010JZH0096)
语种	英语
WOS记录号	WOS:000308827100088
公开日期	2013-10-11
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/3846]
专题	兰州化学物理研究所_OSSO国家重点实验室兰州化学物理研究所_ERC国家工程研究中心
作者单位	1.Nanchang Univ, Dept Chem, Nanchang 330031, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li YX,Tang LF,Peng SQ,et al. Phosphate-assisted hydrothermal synthesis of hexagonal CdS for efficient photocatalytic hydrogen evolution[J]. CrystEngComm,2012,14(20):6974-6982.
APA	Li YX,Tang LF,Peng SQ,Li ZC,&Lu GX.(2012).Phosphate-assisted hydrothermal synthesis of hexagonal CdS for efficient photocatalytic hydrogen evolution.CrystEngComm,14(20),6974-6982.
MLA	Li YX,et al."Phosphate-assisted hydrothermal synthesis of hexagonal CdS for efficient photocatalytic hydrogen evolution".CrystEngComm 14.20(2012):6974-6982.