Core-shell structured γ-Fe2O3@SiO2@AgBr:Ag composite with high magnetic separation efficiency and excellent visible light activity for acid orange 7 degradation

- Core-shell structured composite photocatalyst was constructed by a versatile multistep route.
- Electrostatic assembly was used to deposit AgBr shell layer.
- Core-shell structured photocatalyst shows excellent activity for AO7 degradation.
- Core-shell structured photocatalyst can be rapidly separated by external magnetic field.
- Core-shell structured photocatalyst can be recovered to disperse state by a slight shaking.