| Summary: | 碩士 === 國立中興大學 === 環境工程學系所 === 95 === This investigation aimed at the preparation and characterization of zeolite-supported TiO2 photocatalyst. TiO2 photocatalyst was prepared by the sol-gel technique based on Taguchi’s experimentaled method. In addition, TiO2/zeolite catalysts were synthesized by physical and chemical approaches.
The results indicated that the best candidate of TiO2 photocatalyst was obtained at a molar ratio of TTIP to ethanol (EtOH) to diethylene glycol (DEG) of 1: 40: 0.5, calcination at 600℃ for 90 minutes. The TiO2/zeolite photocatalyst synthesized by the chemical approach exhibited the best settling ability, binding strength and photocatalysic performance. The photocatalyst of 90 wt % TiO2 resulted in the best color removal at pH 7.
Based on the analysis of SEM-EDS and XRD, the results show that the grain size of TiO2 was about 50 nm and the crystal structure was mainly anatase form. Integration with zeolite does not change the structure and chemical properties of the TiO2 powder. In kinetic analysis
, the photodegradation of methylene blue by TiO2/zeolite photocatalyst fits the pseudo-first-order kinetics.
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