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J Nanosci Nanotechnol. 2006 Nov;6(11):3642-6.

A composite photocatalyst of cdS nanoparticles deposited on TiO2 nanosheets.

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  • 1Department of Chemical Engineering/School of Environmental Engineering, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Korea.


A nanocomposite photocatalyst consisting of deposited CdS nanoparticles on TiO2 nanosheets was fabricated by a simple one-pot method. The contact between two phases was maximized by making a composite structure of TiO2 nanosheet decorated with CdS nanoparticles. The composite photocatalyst showed higher photoactivity for hydrogen production from aqueous Na2S/Na2SO3 solution and decomposition of methylene blue under visible light irradiation (lamda > or =420 nm) compared with single component CdS nanoparticles or a physical mixture of CdS nanoparticles and TiO2 nanorods. The intentional formation of nanoscale heterojunctions between two phases appears beneficial for inducing an efficient electron-hole separation.

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