Abstract
Rutile TiO2 nanorod arrays (NRAs) were first fabricated via solvothermal route using Ti foil as both substrate and titanium source, then TiO2/ZnS core-shell heterostructure NRAs were synthesized by successive ionic layer adsorption and reaction (SILAR) method using the TiO2 NRAs as a sacrificial template. The diameters of TiO2 nanorods ranged from 20 to 200 nm, and the thickness of ZnS shell varied from 3 to 20 nm. The photocatalytic activities of the samples were compared by the degradation of rhodamine B (RhB) water solution under simulated sunlight irradiation. All TiO2/ZnS NRAs exhibited higher photocatalytic activities than bare TiO2 NRAs, and the optimal ZnS shell thickness of TiO2/ZnS NRAs was 10 nm. Furthermore, TiO2/ZnS NRAs possessed excellent reusability.
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