PREPARATION METHOD FOR NANO TITANIUM DIOXIDE

摘要

A preparation method for nano titanium dioxide, comprising the following steps: mixing titanium oxide powder with a small amount of water and a catalyst; and performing heat treatment after sealing, so as to obtain a nano titanium dioxide product. The titanium oxide powder comprises one or a combination of more of low crystalline titanium dioxide, amorphous titanium dioxide, titanic acid, metatitanic acid, titanium hydroxide, polytitanic acid and hydrated titanium acid. The catalyst is an acid or a chloride. The specific acid is one or a combination of more selected from hydrochloric acid, perchloric acid, hypochlorous acid, nitric acid, hydrofluoric acid, sulfuric acid and acetic acid. The specific chloride is one or a combination of more selected from titanium tetrachloride, titanium trichloride, titanium oxychloride, silicon tetrachloride, aluminium chloride and zirconium chloride.