金属アルコキシド経由微結晶アナターゼ含有液から作製したTiO_2コーティング膜

概要

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Nanocrystalline anatase suspensions with various formative ratio of anatase(A_f in mass%)were synthesized through hydrolysis and hydrothermal treatment of titanium tetraisopropoxide, and were used for preparation of coating films. Films were dip-coated on glass plates with a withdrawal speed of 50 cm/min, followed by heating at 500°C for 1h. Crack-free and transparent TiO_2 films could be prepared from the suspensions with about 85% A_f. However below about 85% A_f, cracks and island texture were observed in the films. It was found that the area shrinkage of films proportionally decreases with increasing A_f. The critical thickness for obtaining crack-free films from the suspension of about 100% A_f was approximately 1 μm and porosity of the film was about 55%. The high photocatalytic activity of the prepared films was demonstrated from oxidation and removal of NO under UV irradiation.
社団法人日本セラミックス協会の論文
1999-01-01