| 摘要 |
PURPOSE:To obtain a titanium oxide powder excellent in deodorizing ability for malodor gas by depositing zinc and silicon in a specific ratio on a base body particle of titanium oxide. CONSTITUTION:The oxide of zinc and silicon are deposited on the base body particle of titanium oxide by Ti:Zn=9.9:0.1 to 5:5 in the mol ratio of Zn to Ti and Zn:Si=9:1 to 0.1:9.9 in the mol ratio of Si to Zn by adding a zinc compound (e.g. zinc chloride), a silicon compound (e.g. waterglass) and a neutralizer (e.g. water-soluble compound of alkali metal), neutralizing the zinc compound and the silicon compound to pH6-11 in a dispersing solution of the titanium oxide base particle, separating the obtained product and drying at 100-600 deg.C. The titanium oxide powder is excellent in deodorizing ability for malodor gas such as ammonia, methyl mercaptan, hydrogen sulfide, trimethylamine, methyl sulfide or acetoaldehyde and is capable of efficiently removing harmful substances by photocatalytic reaction. |
