Journal
APPLIED SURFACE SCIENCE
Volume 284, Issue -, Pages 285-290Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2013.07.095
Keywords
WO3 nanorod array film; Photoelectrochemical deposition; CoOOH; Photoelectrocatalysis; Hole transfer
Categories
Funding
- National Natural Science Foundation of China [51172233]
- Science & Technology Plan Project of Guangdong Province [2009B030400002]
- National 973 Project of China [2009CB220002]
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A WO3-CoOOH composite film has been fabricated by photoelectrochemical deposition of CoOOH on the surface of WO3 nanorod arrays which are grown perpendicularly on the FTO substrate through solvothermal method. The films were characterized by field emission scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectroscopy. For the films serving as the photoanodes, chopped linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) were measured in a three-electrode system. The photoelectrocatalytic activity was evaluated by the degradation of methylene blue (MB) under the simulated solar light illumination. CoOOH nanoparticles are evenly distributed on the surface of WO3 nanorod, which has a diameter of about 500 nm. The WO3-CoOOH composite film achieves the improved photoelectrocatalytic performance for the degradation of MB, which could be attributed to the effective hole transfer through the valency cycle of cobalt ion in the CoOOH. (C) 2013 Elsevier B. V. All rights reserved.
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