전기방사법에 의한 SiO₂-TiO₂계 복합무기섬유의 제조 및 광촉매 활성 평가

초록

A series of SiO₂-TiO₂ composite sols have been prepared by the hydrolysis of tetraethyl orthosilicate (TEOS) and titanium (IV) isopropoxide dissolved in isopropanol which was controlled by HCl addition. The maximum amount of TiO₂ for suitable fiber formation was about 50 mol% in SiO₂-TiO₂ composite inorganic fibers. The SEM, TEM, and FT-IR results showed that the surface morphology and crystalline phase of the electrospun composite micro/nanoscale SiO₂-TiO₂ fibers were strongly affected by the content of TiO₂ and calcination temperature. The SEM and TEM images reveal that the fibers had diameters varying from hundreds of nanometer to 2 micrometer. The photocatalytic activity of composite inorganic fibers was evaluated by decomposition of methylene blue, acetaldehyde, and formaldehyde in waste water which are recognized as volatile organic compounds (VOCs).

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