Preparation of CNT/Fe-Ni/TiO2/ZnO Arrays Modified Ni Anode and Its Photocatalytic Performance for Hydrogen Evolutionl

TiO2/ZnO nanorode arrays(TiO2/ZnO NRs) were fabricated on Ni substrate anodes by layer by layer(LBL) method. Fe and Ni doped in the TiO2, precursor were used as the catalyst to grow carbon nanotubes(CNTs) on TiO2/ZnO surface by in situ chemical vapor deposition method. The photo-active Ni anode modified by composite photcatalyst of CNT/Fe-Ni/TiO2/ZnO was obtained. Field emission scanning electron microscopy(FESEM), transmission electron microscopy(TEM), Raman spectroscopy, electrochemical impedance spectroscopy(EIS) were used to characterized the structure and properties of the modified anodes. The photocatalytic performance of the modified photoactive anode on the decomposition of water for hydrogen evolution was investigated under the irradiation of ultraviolet light. The results showed that the rate of hydrogen evolution on the photoactive anode modified by CNT/Fe-Ni/TiO2/ZnO increased by 93.7% and 533.0% compared to those on the anodes modified by Fe-Ni/TiO2/ZnO NRs and sole Ni, respectively.