Dependent on the solubility of titanium-oxoclusters, the molar ratios of Ti/Cd in the composite can be adjusted precisely. Herein, a soluble solid-state titanium-oxocluster is employed as a Ti raw reactant to fabricate a TiO 2 /CdS photocatalyst with TiO 2 nanoparticles isolated on the surface of CdS nanorods for highly efficient degradation of tetracycline (TC). The comparative experiment shows that the composite with the Ti/Cd molar ratio at 0.5 exhibits the best photocatalytic performance, which can degrade 95% TC with an initial concentration of 10 mg/L under 12 min visible-light irradiation. The excellent photocatalytic ability of the TiO 2 /CdS composites made of soluble titanium-oxo-clusters is superior to those of the pure CdS and TiO 2 , which is attributed to not only the synergic effect of TiO 2 /CdS heterostructure on improvement of photogenerated electron−hole pairs' separation and lifetime but also the ideal dispersion of the isolated TiO 2 nanoparticles on the surface of CdS nanorods. This work presents a facile way to achieve a highly active catalyst with controllable TiO 2 -involved heterostructure for photocatalytic degradation.
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