中文摘要：

通过液相反应胶粒析出机理分析，首次采用快采用速高强度机械混合液相沉淀技术在室温、常压下制备了小粒径（平均2nm）无定型氢氧化钛纳米粉体。经600℃焙烧，获得锐钛矿型纳米氧化钛。经TEM和XRD表征，平均粒径大小为9nm，为单一高纯相纳米氧化钛。利用混合强度对浆料过滤性的较大影响。在制备过程中通过控制混合强度技术可以实现常压过滤，从而大大节省了能源和时间。将这种锐钛矿型纳米氧化钛粉体应用于空气中清除正戊醇气体的催化效果较好。

英文摘要：

Based on mechanism analysis of colloidal particle precipitation in liquid phase reaction, titania nanopowder （2nm）in amorphous state are prepared by rapidly mixing, using novel liquid-phase precipitation method at room temperature and under air pressure. Anatase nanoparticles are obtained after being calcined at 600℃. XRD presents that anatase is the only phase with high purity. TEM shows the particles are monodispersed with an average diameter of 9nm. Filtration at air pressure can be used by controlling the mixing strength, due to the great effect of mixing strength on fitratation during the preparation process. Hence energy and time can be greatly saved. The catalyzing effect of the anatase nanopowders is good, when it is used to eliminate n-amyl alcohol gas in air.