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Biomolecule-Assisted Synthesis of Nanocrystalline CdS and Bi<sub>2</sub>S<sub>3</sub> for Photocatalytic Hydrogen Evolution

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Author(s): Caolong Li | Wei Chen | Jian Yuan | Mingxia Chen | Wenfeng Shangguan

Journal: World Journal of Nano Science and Engineering
ISSN 2161-4954

Volume: 01;
Issue: 03;
Start page: 79;
Date: 2011;
Original page

Keywords: CdS | Bi2S3 | Photocatalyst | Hydrogen Evolution | Ostwal Ripening

ABSTRACT
Novel CdS and Bi2S3 hollow nanospheres were prepared by simple “one-pot” biomolecule-assisted hydrothermal method using glutathione (GSH) as sulfur source and structure-directing reagents. The single-phase CdS and Bi2S3 photocatalysts were capable of evolving H2 from aqueous solutions containing a sacrificial electron donor, under visible light irradiation (λ ≥ 420 nm) with Pt co-catalyst. A possible formation mechanism of complexation, S-C bond rupture, and spherical aggregate followed isotropic Ostwal ripening or anisotropic Ostwal ripening was proposed in this study.
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