期刊
SURFACES AND INTERFACES
卷 17, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.surfin.2019.100368
关键词
TiO2:Fe3+ thin films; Surface area; HR-TEM; Raman modes; Bandgap; Photoluminescence; Photocatalytic activity
类别
资金
- UGC, New Delhi under the RFSMS scheme [201213-BSR-10196-72]
- DST (SERB), New Delhi [EMR/2017/002651]
- OU DST [PURSE-III/37/2018]
Nanocrystalline TiO2:Fe3+ films were deposited using a simple spin coating technique. The effect of Fe3+ on spectroscopic features and photocatalytic activity of films were studied using X-ray diffractometer (XRD), scanning electron microscope (SEM), Energy dispersive X-ray (EDX), high-resolution transmission electron microscope (HR-TEM), Raman spectrometer, UV-Vis and fluorescence spectrophotometer. The XRD of all the TiO2:Fe3+ films exhibits a decrease in the crystallite size with an increase in Fe3+ concentration. The Fe3+ doped TiO2 nanocrystals exhibited a high specific surface area. The HR-TEM images of 1% and 7% Fe doped TiO2 thin films confirmed the average particle size is about 14 and 8 nm respectively. The Raman modes of vibrations present in the TiO2:Fe3+ films also confirms the formation of the anatase phase. The optical bandgap energy of titania decreases from 3.32 to 2.57 eV. The luminescent emission intensity of TiO2:Fe3+ films decreased compare to pure titania film. Moreover, the photocatalytic activity (PCA) of TiO2:x%Fe3+ (x = 0, 1, 3, 5, 7 and 10) catalysts were determined by the decomposition of methylene blue (MB) under irradiation of visible light. The observed results revealed that the optimized Fe3+ doped TiO2 film displayed high PCA. The enhancement of PCA of the films is due to the effect of Fe doping.
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