Preparation of Size-Controlled TiO2 Nanoparticles and Derivation of Optically Transparent Photocatalytic Films

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• 作者：Seung Yong Chae ; Myun Kyu Park ; Sang Kyung Lee ; Taek Young Kim ; Sang Kyu Kim ; and Wan In Lee
• 刊名：Chemistry of Materials
• 出版年：2003
• 出版时间：August 26, 2003
• 年：2003
• 卷：15
• 期：17
• 页码：3326 - 3331
• 全文大小：268K
• 年卷期：v.15,no.17(August 26, 2003)
• ISSN：1520-5002

文摘

TiO₂ nanoparticles were prepared by hydrothermal reaction of titanium alkoxide stabilizedin acidic ethanol/water solution. The sizes of particles have been controlled to the range of7-25 nm by adjusting the concentration of Ti precursor and the composition of the solventsystem. The TiO₂ samples synthesized under this acidic ethanol/water environment weremainly primary particles in anatase phase without secondary structure. The suspension ofas-prepared 7-nm-sized TiO₂ nanoparticles demonstrates long-term stability, and has beenapplied successfully for the fabrication of ultra-transparent particulate TiO₂ films. Thephotocatalytic efficiency of TiO₂ films prepared from the 7-nm-sized nanoparticles was 1.6times of that of films derived from Degussa P25 in decomposing gaseous 2-propanol.