Synthesis and Photocatalytic Activity of One-Dimensional CdS@TiO2 Core-Shell Hetero-structures

One-dimensional Cd S@TiO2core-shell heterostructures were fabricated via the hydrolysis of tetrabutyl titanate(TBT) on preformed Cd S nanowires. The as-prepared products were characterized by X-ray diffraction, transmission electron microscopy, selected area electron diffraction and diffuse reflectance spectroscopy techniques. Results demonstrated that the hydrolysis of TBT had a great influence on the morphology of the coated TiO2shell, resulting in the formation of TiO2nanoparticles and nanolayer-modified Cd S@TiO2heterostructures. Degradation of methylene blue using Cd S@TiO2core-shell heterostructures as photocatalysts under visible light irradiation was investigated. Comparative photocatalytic tests showed that the TiO2nanoparticles-modified heterostructure exhibited a superior activity due to the passivity of photogenerated charge carriers.