Abstract: The upright and orderly TiO2 nanotubes, ATiO2NTs were prepared by anodic oxidation method on the base matrix TiO2. The ZnFe2O4/TiO2NTs were obtained by impregnation of ZnCl2 and FeCl3 solution and applied to the photoelectrocatalytic reduction of CO2. The TiO2NTs and ZnFe2O4/TiO2NTs were characterized by SEM, XRD and UV-vis. The effects of the preparation conditions on the morphology of TiO2NTs were discussed. The results showed that the zinc and iron oxide are on the surface of TiO2NTs, and the band gap of the catalyst is 2.48 eV. It was found that the catalyst has excellent photoelectrocatalytic reduction performance for CO2. The larger alcohol compounds, like isoamyl alcohol, alien alcohol, are obtained.

Key words: TiO2NTs, photoelectrocatalysis, CO2 reduction