| Summary: | 碩士 === 國立中興大學 === 化學工程學系所 === 101 === In this thesis, the purpose of this study is to prepare platinum-titania photocatalyst by photoreduction and sol-gel method and to apply it on photocatalytic reaction. The catalyst were tested by using quartz glass reactor under the UV light illumination. The parameters of catalyst preparation include temperature of calcination, kinds of protectant, weight of PEG400 adding, stirring, loading of platinum, UV light source to prepare 0.5wt.% of platinum and different kinds of base to prepare 1wt.% of platinum supported on titania. Operating conditions in photocatalytic reaction included wavelength illumination, initial concentration of methyl orange solution and photodegradation of methylene blue.
The results revealed that the prepared catalyst by sol-gel method, with calcination temperature at 500℃ enhanced conversion of methyl orange solution. Loading 1wt.% platinum in titania enhanced activity of catalyt. Under the UV light illumination, methyl orange solution was got 91.5% of conversion. The particle size of platinum metal is very small with particle size at almost 2-3 nm.
The catalyst of Pt(1)TiO2(99)(TTIP) was used to proceed the photodegration of the methyl orange solution under irradiation of UV light (365nm), and the conversion of methyl orange solution was 92.3% in 150 min. Photodegradation of the methylene blue solution under irradiation of UV light (365nm), the conversion of methylene blue solution was 95.1% when reaction time is 150 min.
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