| Summary: | 碩士 === 國立高雄第一科技大學 === 電機工程研究所碩士班 === 105 === Due to the super-hydrophilic properties, chemical and physical stability of titanium dioxide, it is more suitable as a photocatalyst material compared to other semiconductor materials. Zinc oxide is a comparable candidate as a catalyst material with similar large band gap. In order to enhance their catalyst performance of the composite titanium dioxide and zinc oxide, the band structure of junction and crystallinity need to be optimized.
In this experiment, titanium dioxide and zinc oxide composite thin films with nano grain size were prepared by sputtering method. The glass and anodic aluminum oxide were chosen as the substrates. The effects of sputtering pressure and subsequent annealing process on the characteristics of surface morphology and crystallinity were examed, thus optimization of photodegradation efficacy.
The photodegradation efficacy in cuvette of methylene blue by ordered porous titanium dioxide/Zinc oxide composites thin film on glass substrate can reach 84.67% of degradation after UV-light treatment for 5 hours in cuvette. In contrast, after UV-light treatment for 5hours, titanium dioxide/zinc oxide thin film on glass substrate, annealing at 500℃, can only achieve 89.53% of degradation.
This experiment successfully prepared ordered porous titanium dioxide/Zinc oxide composites nanostructure with high specific surface area and enhanced photodegradation efficiency, using one-step anodizing anodic aluminum oxide membrane.
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