水溶性Ti錯体を用いたTiO2光触媒薄膜の低温作製

概要

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Two kinds of water-soluble titanium complexes (titanium acetylacetonate complex and titanium glycolate complex) were synthesized. Through the hydrothermal treatment of these complex aqueous solutions using a reflux apparatus or autoclave, TiO2 sol solutions without generating precipitates were able to be prepared. Then, coating of these solutions on glass substrates by means of spin coating technique followed by heat treatment at a low temperature (200°C) successfully formed uniform TiO2 films with good transparency. The measurement results of X-ray diffraction patterns showed that these thin films were composed of anatase type TiO2 crystals. In addition, photodegradable activity test using salicylic acid and contact angle measurement test clarified that these thin films had very high photodegradable activity and showed superhydrophilicity after light irradiation. The cause of these phenomena is considered due to that the reflux treatment or autoclave treatment of titanium complex aqueous solutions generated stable solutions with dispersion of TiO2 crystals made of ultrafine particles.
2014-03-01