Preparation of SrTi0.1Fe0.9O3−δ and its photocatalysis activity for degradation of methyl orange in water

► Bifunctional SrTi0.1Fe0.9O3−δ with magnetic properties and visible photocatalytic activity. ► SrTi0.1Fe0.9O3−δ can be recycled by an external magnetic field and redispersed again. ► SrTi0.1Fe0.9O3−δ shows excellent photocatalytic activity of MO under natural sunlight. ► The SrTi0.1Fe0.9O3 are reusable and maintain relatively high activity.