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Effect of Rutile Structure on TiO2 Photocatalytic Activity

Submission Date :
8 / 11 / 2005 , 12 : 16 : 35
Abstract Number :
Presenting Type:
Poster Presentation
Presenting Area :
Authors :
윤태관, 김승민, 홍대일
계명대학교 화학과,
Assigned Code :
22P108포 Assigend Code Guideline
Presenting Time :
토 <발표Ⅳ>
The TiO2 photocatalysts in the anatase, rutile, and both phases were prepared by the hydrolysis of TiCl4. The prepared samples have been characterized by powder x-ray diffraction(XRD), BET, TEM, XPS, and UV-Vis diffuse reflectance spectroscopy. UV-Vis diffuse reflectance spectra show a slight shift to longer wavelengths and an extension of the absorption in the visible region for rutile and rutile/anatase mixtures compared to the anatase catalyst. The photoactivity of these catalysts was tested in the photocatalytic degradation of congo red diluted in water under UV and Visible irradiation. It was found that catalysts of both phases have better catalytic activity for degradation of congo red than anatase and rutile catalysts. The fraction of rutile plays a significant role in affecting its photoactivity for photodegradation of with optimum fraction can enhance photoactivity, especially under visible light irradiation.