Exceptional visible-light-driven photocatalytic activity over BiOBr–ZnFe2O4 heterojunctions

An ultrasound-assisted, precipitation–deposition method has been developed to synthesise visible-light-responsive BiOBr–ZnFe2O4 heterojunction photocatalysts. The heterojunctions with suitable BiOBr/ZnFe2O4 ratios have a fascinating micro-spherical morphology and exhibit exceptional photocatalytic activity in visible-light degradation of Rhodamine B.