What is it about?
In this work, TiO2/SiO2 nanocomposites were synthesized by dc reactive magnetron co-sputtering technique using different O2:Ar gas mixing ratios. The structural and spectroscopic characteristics of the synthesized samples were introduced using x-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDX), and UV-visible spectroscopy. The XRD results revealed that all nanocomposite samples were polycrystalline. The functional groups of these samples were identified by FTIR. The UV-visible spectra of these samples showed an absorption edge at 450nm.
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Why is it important?
The results of photodegradation of organic and water pollutants under UV irradiation suggest that the photocatalytic activity of TiO2/SiO2 nanocomposite is highly improved as compared with that of TiO2 nanophotocatalyst.
Perspectives
A TiO2/SiO2 nanocomposite thin films were successfully synthesized as photocatalyst to be used in water purification. These nanocomposites were prepared by dc reactive magnetron co-sputtering technique with a novel model for the geometrical arrangement of the two targets (Ti and Si). The photodegradation results have confirmed that the photocatalytic activity of the TiO2/SiO2 nanocomposite prepared using Ar:O2 gas mixing ratio of 50:50 is higher than that of TiO2 thin films. The enhancement in charge separation is due to the enhancement in the photocatalytic activity of TiO2/SiO2 nanocomposite. The enhanced photocatalytic activity and low preparation cost suggest the practical implementation of this promising composite material for use in environmental remediation, solar cells, nanodevices and other applications.
Dr Oday A. Hammadi
Al-Iraqia University
Read the Original
This page is a summary of: Photocatalytic activity of TiO2/SiO2 nanocomposites synthesized by reactive magnetron sputtering technique, Journal of Nanophotonics, May 2022, SPIE,
DOI: 10.1117/1.jnp.16.026005.
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