Visible light photocatalytic activities of ZnFe2O4 loaded by Ag3VO4 heterojunction composites

► Novel composite ZnFe2O4/Ag3VO4 as catalyst. ► Higher activity for the photodegradation of RhB under visible light irradiation. ► Calcination temperature of catalyst has effect on photocatalytic activity. ► Catalyst electrodes demonstrate a rapid photocurrent response. ► O2-, HO2, and hVB+ as the main active species.