A nanostructured ZnO–ZnFe2O4 heterojunction for the visible light photoelectrochemical oxidation of water

Abstract

A heterojunction is successfully fabricated by decorating ZnO nanorods with water-soluble, mono-dispersed ZnFe₂O₄ particles. In comparison with bare ZnO, the enhanced visible light absorption and photocurrent (λ > 420 nm) for the photoanode of the ZnO–ZnFe₂O₄ composite is correlated with the visible light response of the ZnFe₂O₄ prepared and the rapid charge transfer within the heterojunction as evidenced by the electrochemical impedance spectra.