Adsorption and photocatalytic decomposition of organic molecules on carbon-coated TiO2 |
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| Authors: | Tae-Won Kim Min-Joo Lee Wang-Geun Shim Jae-Wook Lee Tae-Young Kim Dae-Haeng Lee Hee Moon |
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| Affiliation: | (1) School of Applied Chemical Engineering, Chonnam National University, Gwangju, 500-757, Korea;(2) R&D Center, NEXEN TIRE Corporation, Yangsan Kyungnam, 626-230, Korea;(3) Department of Chemical and Biochemical Engineering, Chosun University, Gwangju, 501-759, Korea;(4) Department of Environmental Engineering, Chonnam National University, Gwangju, 500-757, Korea;(5) Gwangju Public Health and Environmental Research Institute, Gwangju, 502-240, Korea |
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| Abstract: | Carbon-coated anatase TiO2 samples were prepared from the mixture of poly vinyl alcohol (PVA) and commercial TiO2 (P-25) with different mass ratios and heating temperatures. The samples were characterized by X-ray diffraction (XRD), field
emission scanning electron microscope (FE-SEM), energy dispersive spectrometer (EDX), transmission electron microscope (TEM),
and nitrogen adsorption analyses. The adsorption properties and photocatalytic activity of commercial and carbon-coated TiO2 catalysts were compared for the oxidation of methylene blue (MB) and bisphenol-A (BPA). It was interesting to find that the
transition from anatase to rutile was suppressed by carbon coating of TiO2 at high temperature up to 800 °C. The carbon-coated TiO2 samples have a higher surface area and a greater adsorption amount than commercial P-25 because of the thin layer of carbon
that covered TiO2. It was also observed that the photodecomposition efficiency was dependent on the crystallinity of the carbon-coated sample. |
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