Immobilization of highly active titanium(IV) oxide particles: A novel strategy of preparation of transparent photocatalytic coatings
Immobilization of highly active titanium(IV) oxide particles: A novel strategy of preparation of transparent photocatalytic coatings
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DOI：
10.1016/s0926-3373(00)00245-9
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发表时间：
2001-03
影响因子：
22.1
通讯作者：
H. Kominami;H. Kumamoto;Y. Kera;B. Ohtani
中科院分区：
文献类型：
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作者：
H. Kominami;H. Kumamoto;Y. Kera;B. Ohtani
采用有机介质水热结晶（HyCOM）法制备了具有超高光催化活性的氧化钛（TiO2）粉末，并将其作为制备透明TiO2薄膜的起始材料。将hycom - tio2粉末分散在硝酸水溶液中，制备出稳定性超过90天的tio2溶胶。采用浸渍法制备了透明tio2薄膜，并在曝气条件下用于光催化分解孔雀石绿（MG）。与市售的用于光催化用途的二氧化钛溶胶（Ishihara STS-01）制备的薄膜相比，这些薄膜的MG分解率要高得多，这表明通过本方法固定在玻璃基板上后，原始hycom - tio2颗粒的优异光催化活性得到了保留。
Titanium(IV) oxide (TiO2) powders synthesized by HyCOM (hydrothermal crystallization in organic media) method, which had been proved to exhibit ultra-high photocatalytic activity in several reaction systems, were used as starting material for fabrication of transparent TiO2thin films. HyCOM-TiO2powders were dispersed in aqueous sol of nitric acid to yield a TiO2sol stable for more than 90 days. Transparent TiO2thin films were successfully produced by dip-coating from the TiO2sol and used for photocatalytic decomposition of malachite green (MG) in an aqueous sol under aerated conditions. These films exhibited much higher rate of MG decomposition compared with those prepared from a commercially available TiO2sol developed for photocatalytic use (Ishihara STS-01), indicating that the excellent photocatalytic activity of original HyCOM-TiO2particles was preserved after immobilization on glass substrates by the present method.