Sol-Gel Synthesis and Characterization of TiO2-Based Photocatalyst and its Photoactivity Research

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Abstract:

The TiO2-based photocatalysts have been synthesized by using sol-gel process and their photocatalytic activities were studied by the degradation of methylene blue (MB). It was shown that the calcination temperature has great influence on the crystalline phase transition of TiO2. For all the samples (Ag-doped and undoped TiO2 photocatalysts) calcined at 573K, only anatase phase was observed from XRD diffraction spectra and the intensity of peaks is weak. After the calcined at 773K, a mixture of anatase-rutile phase appeared. The contents of rutile phase were about 85% and77% for undoped and Ag-adopted TiO2 photocatalysts.There were only rutile phases for all the TiO2 photocatalysts calcined at 973K observed from XRD diffraction spectra. Magnetically stirring time of A solution before added B had no obvious effects on the polymorphs transition of TiO2.

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Advanced Materials Research (Volumes 864-867)

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613-616

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December 2013

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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