Facile synthesis of CdS@TiO2 core-shell nanorods with controllable shell thickness and enhanced photocatalytic activity under visible light irradiation

- CdS nanorods were coated with amorphous TiO2 shells under a mild condition.
- The TiO2 shell thickness can be controlled from 3.5 to 40 nm.
- CdS@TiO2 nanorods exhibit enhanced photocatalytic activities under visible light.
- Efficient charge carriers separation leads to the improved photocatalytic activity.