광촉매 응용을 위한 TiO2 나노 섬유의 미세구조 제어 = Control of Microstructure on TiO2 Nanofibers for Photocatalytic Application

다국어 초록 (Multilingual Abstract)

TiO2 has excellent photocatalytic properties and several studies have reported the increase in its specific surfacearea. The structure of TiO2 nanofibers indicates promising improved photocatalytic properties and these nanofibers can thuspotentially be applied in air pollution sensors and pollutant removal filters. In this study, a TiO2 nanofiber was fabricatedby the electrospinning method. The fabrication processing factors such as the applied voltage, the distance between nozzleand collector, and the inflow rate of solution were controlled. The precursor was titanium (Ⅳ) isopropoxide and as-spunTiO2 nanofibers were heated at 450℃ for 2 h to obtain an anatase crystalline structure. The microstructure was analyzedusing field emission scanning electron microscope (FE-SEM) and X-ray diffraction analysis (XRD). The anatase phase wasobserved in the TiO2 nanofibers after heat treatment. The diameter of TiO2 nanofibers increased with the flow rate, butdecreased with decreasing applied voltage and nozzle to collector distance. The diameter of TiO2 nanofibers was controlledin the range of 364 nm to 660 nm. These nanofibers are expected to be very useful in photocatalytic applications.

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