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    題名: Photocatalytic abilities of gel-derived P-doped TiO2
    作者: Yu, Hsuan-Fu
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: A. Ceramics;A. Semiconductors;B. Chemical synthesis;C. X-ray diffraction;D. Phase transitions
    日期: 2007-04
    上傳時間: 2013-06-13 11:28:47 (UTC+8)
    出版者: Kidlington: Pergamon
    摘要: P-doped TiO2 nanoparticles were synthesized through hydrolysis and condensation of Ti(OC2H5)4 with H3PO4 additions. Effects of [H3PO4]/[Ti(OC2H5)4] molar ratios on the anatase-to-rutile phase transformation, crystallite sizes, surface areas, and photocatalytic abilities of the gel-derived P-doped TiO2 were investigated. The P-doped TiO2 nanoparticles prepared by [H3PO4]/[Ti(OC2H5)4]=0.03 were composed of anatase monophase even at 900 oC and possessed very strong photocatalytic ability. Kinetic studies on the P-doped TiO2 to photocatalytically decompose methylene blue under irradiation of 365 nm UV light found that the P-doped TiO2 prepared by [H3PO4]/[Ti(OC2H5)4]=0.03 and calcined at 800 oC had the specific reaction rates, at 25 °C, kA,m=0.76 m3/(kg min) (based on the mass of P-doped TiO2) and kA,BET=46.2×10−6 m/min (based on the BET surface area of P-doped TiO2), which is superior to the performance of a commercial product, P25 (kA,m=0.22 m3/(kg min) and kA,BET=4.8×10−6 m/min).
    關聯: Journal of Physics and Chemistry of Solids 68(4), pp.600-607
    DOI: 10.1016/j.jpcs.2007.01.050
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文


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