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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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World Journal of Nano Science and Engineering·Volume 01 (2011)·Pages 79–83·Published 29 September 2011·DOI10.4236/wjnse.2011.13012
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Abstract
Novel CdS and Bi<sub>2</sub>S<sub>3</sub> 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 Bi<sub>2</sub>S<sub>3</sub> photocatalysts were capable of evolving H<sub>2</sub> 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.
KeywordsCdSBi<sub>2</sub>S<sub>3</sub>PhotocatalystHydrogen EvolutionOstwal Ripening
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