Visible- Light- Induced Generation of H2 by Nanocomposites of Few- Layer TiS2 and TaS2 with CdS Nanoparticles

被引：39

作者：

Gupta, Uttam ^{[1
,2
]}

Rao, Bolla Govinda ^{[1
,2
]}

Maitra, Urmimala ^{[1
,2
]}

Prasad, B. E. ^{[1
,2
]}

Rao, C. N. R. ^{[1
,2
]}

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, New Chem Unit, Bangalore 560064, Karnataka, India

[2] Jawaharlal Nehru Ctr Adv Sci Res, Int Ctr Mat Sci, Bangalore 560064, Karnataka, India

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2014年 / 9卷 / 05期

关键词：

graphene; layered chalcogenides; photocatalysis; turnover frequency; water splitting; PHOTOCATALYTIC H-2-PRODUCTION PERFORMANCE; HYDROGEN-PRODUCTION; H-2; EVOLUTION; GRAPHENE; WATER; IRRADIATION; COMPOSITES; PRINCIPLES; NANOSHEETS; MOS2;

D O I：

10.1002/asia.201301537

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphene analogues of TaS2 and TiS2 (3-4layers), prepared by Li intercalation followed by exfoliation in water, were characterized. Nanocomposites of CdS with few-layer TiS2 and TaS2 were employed for the visible-light-induced H-2 evolution reaction (HER). Benzyl alcohol was used as the sacrificial electron donor, which was oxidized to benzaldehyde during the reaction. Few-layer TiS2 is a semiconductor with a band gap of 0.7eV, and its nanocomposite with CdS showed an activity of 1000molh(-1)g(.)(-1) The nanocomposite of few-layer TaS2, in contrast, gave rise to higher activity of 2320molh(-1)g(-1), which was attributed to the metallic nature of few-layer TaS2. The amount of hydrogen evolved after 20 and 16h for the CdS/TiS2 and CdS/TaS2 nanocomposites was 14833 and 28132mol, respectively, with turnover frequencies of 0.24 and 0.57h(-1), respectively.

引用

页码：1311 / 1315

页数：5

共 36 条

[1] Recent progress on photocatalytic and photoelectrochemical water splitting under visible light irradiation [J].