Preparation and Photocatalytic Hydrogen Production Properties of Mesoporous CdS/TiO2 Composites.

The mesoporous CdS/TiO₂ composites were synthesized by a sol–gel method combined with solvothermal method. The material showed the gel block-like structures which were composed of heterogeneous spherical gel particles, the average size of the particles was about 14 nm, with specific surface area as 300.254 m² g − 1 . The mesoporous CdS/TiO₂ composites exhibited a wide absorption band to simulated sunlight whose adsorb wavelength reached to 550 nm, its absorption intensity and catalytic performance of photocatalytic water-producing hydrogenation were also increased with the increase of CdS contents. When the molar ratio of TiO₂:CdS was 1:1, the photocatalytic activity reached the highest, and the average hydrogen production rate reached 2167.32 μ mol g − 1 h − 1 . Mesoporous CdS/TiO₂ composites were synthesized by a sol–gel method combined with solvothermal method, and the photocatalytic activity was evaluated under visible light irradiation. The prepared material had larger specific surface and higher photogenerated electron hole separation rate. The average hydrogen production rate of the prepared material reached 2167.32 μmol⋅g^–1⋅h^–1. [ABSTRACT FROM AUTHOR]