Water‐Soluble MoS3 Nanoparticles for Photocatalytic H2 Evolution. Issue 8 (31st March 2015)

• Record Type: Journal Article
• Authors: Zhang, Wei; Zhou, Tianhua; Zheng, Jianwei; Hong, Jindui; Pan, Yunxiang; Xu, Rong
• Is Part Of: ChemSusChem. Volume 8:Issue 8(2015:Apr.)
• Page Start: 1464
• Page End: 1471
• Publication Date: 2015-03-31
• Subjects: hydrogen evolution -- molybdenum sulfide -- photocatalyst -- photosensitizer -- water splitting; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201500067
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Polyvinylpyrrolidone (PVP)‐modified MoS3 nanoparticles with unusual water solubility up to 1.0 mg mL −1 were synthesized through a facile hydrothermal method in the presence of thioacetic acid. The amorphous nanoparticles wrapped by PVP have sizes of around 2.5 nm, which represent the smallest MoS3 clusters reported. The photocatalytic performance of the MoS3 nanoparticles was evaluated under visible light for H2 evolution using xanthene dyes as photosensitizers. The quantum efficiency of the optimized system for H2 evolution under green light irradiation (520 nm) is up to 36.2 %, which is comparable with those of other excellent photocatalytic systems involving earth‐abundant catalysts. The excellent photocatalytic activity can be attributed to its good dispersion in water, amorphous nature and limited layers with abundant surface active sites, and possibly higher conduction band potential for proton reduction and larger indirect band gap for a longer lifetime of the excited electrons. Abstract : Green light for H2 evolution: MoS3 nanoparticles with unusually high water solubility were synthesized through a facile hydrothermal method. Their excellent quantum efficiency for H2 evolution under green light irradiation can be attributed to their good dispersion in water, amorphous nature, abundant surface active sites, higher conduction band potential for proton reduction, and larger indirect band gap for a longer lifetime of the excited electrons.