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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2014, Vol. 35 ›› Issue (10): 2865-2872.doi: 10.7527/S1000-6893.2014.0148

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Preparation and Photoelectrochemical Water Oxidation Properties of ZnO/Ni-Bi Composite Photoanodes

YU Hao, XIE Yonghong, XU Di, XIANG Min, DIAO Peng   

  1. School of Materials Science and Engineering, Beihang University, Beijing 100191, China
  • Received:2014-04-22 Revised:2014-07-09 Online:2014-10-25 Published:2014-07-11
  • Supported by:

    National Natural Science Foundation of China (201173016, 20973020);Beijing Natural Science Foundation (2142020);Doctoral Fund of Ministry of Education of China (20101102110002)

Abstract:

ZnO nanorods were hydrothermally synthesized on the surface of indium tin oxide glass using precipitate pre-treating method. The ZnO nanorods were uniformly and firmly grown on the indium tin oxide glass and possesed high photoelectrochemical oxygen evolution performance. Then electriocatalysis Nickel-borate were deposited onto the surface of ZnO with electro-assisted photodeposition method. The composite photoanodes were characterized by scanning electron microscopy (SEM), X-ray diffraction(XRD) and the UV-vis diffuse reflection spectroscopy, and the photoelectrochemical water oxidation properties of ZnO/Ni-Bi composite photoanodes were investigated by electrochemical and photoelectrochemical methods. The effect of deposition methods, deposition time and heat treatment progress to the photoelectrochemical oxygen evolution performance of the ZnO/Ni-Bi composited photoanodes were invesigated. The performance of ZnO is improved for as high as 40% after coupling with Ni-Bi. The high oxygen evolution activity of the composite photoanodes can be attributed to seperation and inhibit of hole-electron recombination by Ni-Bi through facilitating the transfer of photon-induced holes from ZnO for water oxidation.

Key words: hydrothermal synthesis, zinc oxide nanorods, electro-assisted photodeposition of Ni-Bi, watersplitting, oxygen evolution

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