Photocatalytic activity and photoluminescence properties of TiO2, In2O3, TiO2/In2O3 thin films multilayer

This study evaluated the effect of crystallization temperature (300, 500 and 700 °C) on the photocatalytic and photoluminescent properties of the multilayer thin films of TiO 2 , In 2 O 3 and TiO 2 /In 2 O 3 which were prepared by the Complex Polymerization Method (CPM) and deposited on substrates o...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2018-04, Vol.29 (8), p.6530-6542
Main Authors: Garcia, L. M. P., Tavares, M. T. S., Andrade Neto, N. F., Nascimento, R. M., Paskocimas, C. A., Longo, E., Bomio, M. R. D., Motta, F. V.
Format: Article
Language:English
Subjects:
Absorption spectra
Atomic force microscopy
Catalytic activity
Characterization and Evaluation of Materials
Charge transfer
Chemistry and Materials Science
Crystallization
Electromagnetic absorption
Indium oxides
Materials Science
Optical and Electronic Materials
Photocatalysis
Photoluminescence
Silicon substrates
Spin coating
Thin films
Titanium dioxide
Titanium oxides
X-ray diffraction
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Summary:This study evaluated the effect of crystallization temperature (300, 500 and 700 °C) on the photocatalytic and photoluminescent properties of the multilayer thin films of TiO 2 , In 2 O 3 and TiO 2 /In 2 O 3 which were prepared by the Complex Polymerization Method (CPM) and deposited on substrates of Si (100) by the spin coating method. The results of X-ray diffraction (XRD) revealed that there was no chemical interaction between the oxides (TiO 2 /In 2 O 3 ) in crystalline films. The morphology was observed by atomic force microscopy (AFM) with a mean grain size of 15–35 nm. The result showed that the photocatalytic property is significantly increased by increasing the crystallization temperature. This is due to the agitation of the molecules which facilitates the transfer of charge between the electron and the catalyst bore. UV–vis light absorption spectra indicated that the addition of In 2 O 3 in TiO 2 films is an effective way of increasing the uptake of TiO 2 in the visible region up to ~ 600 nm for photocatalytic applications, it was also possible to observe that these films could be easily Recycled for reuse. The samples were also characterized by photoluminescence, where it was possible to observe that the reduction of the PL intensity increased the photocatalytic activity of the thin films, with the increase of the crystallization temperature. In addition, the method used in this study is simple and economical compared to other methods.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-018-8635-x