| 摘要 |
PROBLEM TO BE SOLVED: To use favorably a photocatalyst as a deodorant, a decolorizer, and a stainproofing function additive for making a glass ultrahydrophilic by improving a photocatalytic activity by a method wherein yttrium is contained within a specific range to a titanium oxide. SOLUTION: A photocatalyst is obtained wherein a mixture of a titanium hydroxide containing yttrium within the range of 0.01 to 5 mol.% to a titanium oxide is prepared, and the mixture is burnt at a temperature within 200 to 700 deg.C in an oxidizing atmosphere like the air. That is, yttrium nitrate is added to a solution wherein titanium tetraisopropoxide is diluted by ethanol so as to obtain 0.5 mol.% in yttrium conversion to the titanium oxide, charged into water, hydrolyzed, polycondensed, and dried by filtering the obtained reaction product to obtain a photocatalyst comprising an anatase-type titanium oxide by burning at 400 deg.C in the air. |
