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论文类型：期刊论文

发表时间：2004-01-01

发表刊物：PHYSICAL CHEMISTRY CHEMICAL PHYSICS

收录刊物：SCIE

卷号：6

期号：3

页面范围：659-664

ISSN号：1463-9076

摘要：Nanocrystalline TiO2 composite thin ZnO/TiO2, Fe2O3/ZnO/TiO2 and Fe2O3/TiO2 films 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 films towards photodegradation of pentachlorophenol pollutant was examined and their efficiency was compared to those of the different TiO(2)films. 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.