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Effect of synthesis conditions on the preparation of titanium dioxides from peroxotitanate solution and their photocatalytic activity
Authors:Young Bok Ryu  Won Young Jung  Man Sig Lee  Euh Duck Jeong  Hyun Gyu Kim  Seong-Soo Park  Gun-Dae Lee and Seong-Soo Hong
Institution:(1) Division of Applied Chemical Engineering, Pukyong National University, 100 Yongdang-dong, Nam-ku, Busan, 608-739, Korea;(2) Busan R&D Center, Korea Institute of Industrial Technology, Busan, Korea;(3) Busan Center, Korea Basic Science Institute, Busan, Korea
Abstract:Nanosized TiO2 particles were prepared by the hydrothermal method from the amorphous powders which were precipitated in an aqueous peroxotitanate solution. The physical properties of the nanosized TiO2 particles prepared were investigated. We also examined the activity of TiO2 particles as a photocatalyst on the decomposition of orange II. The titania sol can be successfully crystallized to the anatase phase through hydrothermal aging at temperatures higher than 160°C. The particle size increases from 18 to 26 nm as the synthesis temperature increases from 140 to 200°C. Titania particles prepared at 180°C show the highest activity, and titania particles calcined at 400°C show also the highest activity on the photocatalytic decomposition of orange II.
Keywords:Nanosized TiO2            hydrothermal synthesis  peroxotitanate solution  photocatalytic degradation of orange II
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