A Composite Photocatalyst of CdS Nanoparticles Deposited on TiO₂ Nanosheets

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 (λ ≥ 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.