| Summary: | 碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系 === 99 === Electrospinning display tremendous functions in some of the domain of sciences, such as, electrochemistry, gas storage, drug release, and environmental protection. In this study, precursor solution contains polyvinylpyrrolidone (PVP), titanium tetraisopropoxide (TTIP), alcohol, and appropriate templates. The precursor was ejected through a needle under a high voltage electric field and then collected the micro/nano organic-titanium fibers. Following calcination process was adopted to remove the polymer parts.
The visible-light-responsive TiO2-XNX mesoporous hollow tubular photocatalysts were characterized by wide angle x-ray diffraction (WAXD), field emission scanning electron microscopy (FE-SEM), isotherm nitrogen sorption measurement, x-ray photoelectron spectroscopy (XPS). The photocatalytic activity of TiO2-XNX mesoporous hollow tubular photocatalysts were evaluated by measuring the degradation of methylene blue (MB) under visible light irradiation. The change of MB concentration was measured by ultraviolet and visible spectroscopy (UV-Vis).
The experimental results show that the crystalline phase of TiO2-XNX mesoporous hollow tubular photocatalyst is anatase. The specific surface area of mesoporous hollow tubular photocatalysts using PS, Mineral oil, or silica as templates are 37.5 m2/g, 11~31 m2/g, 150~225 m2/g, respectively. The nitrogen (N) doped of TiO2-XNX mesoporous hollow tubular photocatalyst contains 2% N and the P doped of TiO2-XNX mesoporous hollow tubular photocatalyst contains 0.1% P. The photocatalytic activity was evaluated by measuring the degradation of MB under visible light irradiation. The phosphorus doped photocatalyst show superior photodegradation efficiency than nitrogen doped photocatalyst and commercial P-25.
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