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

doi:10.1039/c2ce25838b

	Phosphate-assisted hydrothermal synthesis of hexagonal CdS for efficient photocatalytic hydrogen evolution
Department	OSSO国家重点实验室
	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 ; Li YX(李越湘)
The second department	erc国家工程研究中心
	2012
Source Publication	CrystEngComm
ISSN	1466-8033
Volume	14 Issue:20 Pages:6974-6982
Abstract	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.
Subject Area	物理化学与绿色催化
DOI	10.1039/c2ce25838b
Funding Organization	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)
Indexed By	SCI
If	3.879
Language	英语
Funding Project	环境催化与清洁能源研究组;环境催化与氢能源研究组
compositor	第二作者单位
Citation statistics	Cited Times:80[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.licp.cn/handle/362003/3846
Collection	羰基合成与选择氧化国家重点实验室（OSSO）精细石油化工中间体国家工程研究中心（ERC）
Corresponding Author	Li YX(李越湘)
Affiliation	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
Recommended Citation 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,&李越湘.(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.

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