Nanocrystalline TiO2composite thin ZnO/TiO2, Fe2O3/ZnO/TiO2and Fe2O3/TiO2films were developed on titanium substrates by applying dip-coating technique formed by the sol-gel method. Scanning electron microscopy (SEM) evaluated the surface characteristics of the films. Results on their structure and crystallinity were obtained by means of X-ray diffraction. The samples were also characterized by X-ray energy dispersive spectrometer (EDS) and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic activity of these film; towards photodegradation of pentachlorophenol pollutant was examined and their efficiency was compared to those of the different TiO2films. It has been shown that the film photocatalysts can efficiently decompose the pollutant. The photoelectrocatalytic degradation of PCP showed important variation that decreases in the order: ZnO/TiO2> TiO2> Fe2O3/ZnO/TiO2> Fe2O3/TiO2. The results showed that Zn2+doped could improve PEC activity of titania film electrode while Fe3+doped can not improve that of titania film electrode.
|Number of pages||6|
|Journal||Physical Chemistry Chemical Physics|
|Publication status||Published - 7 Feb 2004|
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry