纳米复合材料
剥脱关节
插层(化学)
材料科学
可见光谱
图层(电子)
带隙
纳米颗粒
石墨烯
光化学
核化学
化学工程
纳米技术
化学
无机化学
光电子学
工程类
作者
Uttam Gupta,Bolla Govinda Rao,Urmimala Maitra,Belavalli E. Prasad,C. N. R. Rao
标识
DOI:10.1002/asia.201301537
摘要
Abstract Graphene analogues of TaS 2 and TiS 2 (3–4 layers), prepared by Li intercalation followed by exfoliation in water, were characterized. Nanocomposites of CdS with few‐layer TiS 2 and TaS 2 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 TiS 2 is a semiconductor with a band gap of 0.7 eV, and its nanocomposite with CdS showed an activity of 1000 μmol h −1 g −1 . The nanocomposite of few‐layer TaS 2 , in contrast, gave rise to higher activity of 2320 μmol h −1 g −1 , which was attributed to the metallic nature of few‐layer TaS 2 . The amount of hydrogen evolved after 20 and 16 h for the CdS/TiS 2 and CdS/TaS 2 nanocomposites was 14833 and 28132 μmol, respectively, with turnover frequencies of 0.24 and 0.57 h −1 , respectively.
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