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New Findings in Titanium Dioxide Nanotechnology Described by F. Oshani and Co-Researchers (Photocatalytic investigations of TiO2-P25 nanocomposite...

August 22, 2014



New Findings in Titanium Dioxide Nanotechnology Described by F. Oshani and Co-Researchers (Photocatalytic investigations of TiO2-P25 nanocomposite thin films prepared by peroxotitanic acid modified sol-gel method)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Nanotechnology have been published. According to news reporting from Tehran, Iran, by NewsRx journalists, research stated, "TiO2 thin films and TiO2-P25 nanocomposite thin films were synthesized by sol gel method utilizing peroxotitanic acid sol (PTA). Films were obtained by three dip coatings of sol on borosilicate glasses."

The news correspondents obtained a quote from the research, "The crystalline size and the variation in phase of thin films were determined through X-ray diffraction. The average crystalline size of the films that was in the range of 42 nm showed a reduction in the value by increasing the rutile content. The surface morphology of the films has been characterized utilizing Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Contact-mode atomic force microscopy (AFM). The results of the morphological investigations were completely coincided with the formation of TiO2-P25 nanocomposite. The optical property of the films has been evaluated by Diffuse Reflection Spectrophotometer (DRS) at the room temperature. The obtained UV-vis spectra for both TiO2 and TiO2-P25 thin films had similar maximum wavelengths. The band gap values for the direct and indirect transitions have been measured for the TiO2 and TiO2-P25 thin films and the results showed negligible variations. The photocatalytical activity of the films was studied by photodegradation of Reactive Red 222 (RR222) under UV irradiation. The results showed that the photocatalytic efficiency of TiO2-P25 nanocomposite thin films had enhanced by the addition of rutile phase which was obviously due to the cooperation of TiO2 and P25 nanoparticles in effective charge transfer process."

According to the news reporters, the research concluded: "Additionally, photodegradation rate constant result calculations for the TiO2-P25 nanocomposite thin films can well exhibit the increase in its photocatalytic performance in comparison with TiO2 thin films."

For more information on this research see: Photocatalytic investigations of TiO2-P25 nanocomposite thin films prepared by peroxotitanic acid modified sol-gel method. Applied Surface Science, 2014;311():308-313. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)

Our news journalists report that additional information may be obtained by contacting F. Oshani, Inst Color Sci & Technol, Dept. of Nanomat & Nanotechnol, Tehran, Iran. Additional authors for this research include R. Marandi, S. Rasouli and M.K. Farhoud (see also Nanotechnology).

Keywords for this news article include: Iran, Asia, Tehran, Photocatalyst, Nanotechnology, Photocatalytic, Titanium Dioxide, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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