Synthesis of TiO2 photocatalyst thin film by solvothermal method with a small amount of water and its photocatalytic performance
2001; Elsevier BV; Volume: 146; Issue: 1-2 Linguagem: Inglês
10.1016/s1010-6030(01)00553-6
ISSN1873-2666
AutoresSang-Hyeun Lee, Misook Kang, Sung M. Cho, Gui Young Han, Byung‐Woo Kim, Ki June Yoon, Chan–Hwa Chung,
Tópico(s)Catalytic Processes in Materials Science
ResumoColloidal solutions containing nano-sized TiO2 particles were successfully obtained by adding a small amount of water and employing solvothermal method. A thin film obtained from this colloidal solution (Cat. 2) exhibited much better properties than another film obtained via a sol–gel method (Cat. 1). The former had smaller and more uniform TiO2 particles than the latter; it also had the anatase structure even after drying at 200°C; a much thinner film of Cat. 2 could be obtained and this film could remain stably attached on a silicon wafer or on a pyrex plate after a thermal treatment. Cat. 2 coated on a γ-alumina exhibited excellent performance for photocatalytic decomposition of CHCl3 under UV-light with O2 bubbling (90% conversion in 10 min), when comparing with a result obtained without the catalyst (70% conversion after 1 h).
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