ペルオキソチタン酸溶液からのペルオキソ修飾されたアナタ-ゼゾルの合成

概要

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A Peroxo titanic acid (PTA) solution has been prepared by mixing titanic acid wet gel and hydrogen peroxide solution. The PTA solution was a neutral, transparent, stable liquid. The PTA crystallized to form an Anatase phase after calcination at a temperature above 250℃ . When the PTA solution was autoclaved at a temperature above 100℃ for 6h, it changed to a sol containing anatase crystals less than 20 nm in diameter. Aggregation occurred after autoclaving at a temperature above 120℃ . When the PTA solution was heated to 100℃ , it was translucent and stable in spite of containing ultrafine allatase crystals (9 nm in diameter) . It was deduced that the surfaces of anatase crystals are modified by the peroxo groups.
社団法人日本セラミックス協会の論文
1996-08-01