Abstract
Porous F-WO3/TiO2(mTiO2) films are prepared on titanium sheet substrates using microarc oxidation (MAO) technique. The X-ray diffraction patterns show that visible-light (Vis) enabling mTiO2films with a very high content of anatase TiO2and high loading of WO3are successfully synthesized at a low applied voltage of 300 V using electrolyte contenting NaF and Na2WO4without subsequent heat treatment. The cross-sectional transmission electron microscopy micrograph reveals that the mTiO2films feature porous networks connected by many micron pores. The diffused reflection spectrum displays broad absorbance across the UV-Vis regions and a significant red shift in the band gap energy (∼2.23 eV) for the mTiO2film. Owing to the high specific surface area from the porous microstructure, the mTiO2film shows a 61% and 50% rate increase in the photocatalytic dye degradation, as compared with the N,C-codoped TiO2films under UV and Vis irradiation, respectively.
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