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    • 8. 发明授权
    • TiO2 ultrafine powder, and process for preparing thereof
    • TiO 2超细粉末及其制备方法
    • US06517804B1
    • 2003-02-11
    • US09610463
    • 2000-07-05
    • Sun-Jae KimSoon Dong ParkChang Kyu RheeWhung Whoe KimIl Hiun Kuk
    • Sun-Jae KimSoon Dong ParkChang Kyu RheeWhung Whoe KimIl Hiun Kuk
    • C01G23047
    • B01J21/063B01J35/004C01G23/0536C01P2004/03C01P2004/10C01P2004/62C01P2006/12
    • The present invention relates to titanium dioxide powder with a large specific surface area, a method for preparing thereof, and a use of the titanium dioxide as a photocatalyst, and more particularly, discloses a method for the preparation of titanium dioxide powder comprised of the steps of adding ice pieces or icy distilled water to pure titanium tetrachloride (TiCl4) to give an aqueous titanylchloride solution of 1.5 M or higher; diluting the aqueous titanylchloride with distilled water; obtaining precipitates from the diluted aqueous titanylchloride solution by standing for 2-20 hours at 15-70° C.; and filtering, washing and drying the above precipitates to give downy hair-shaped TiO2 powder with a specific surface area of 130-200 m2/g. The titanium dioxide powder of the present invention shows high photocatalytic activity, so that it can be used to decompose environmental organic pollutants by taking advantage of an advanced oxidation process (AOP) in which pollution-free energy, such as solar energy is utilized as a driving force. The method allows the formation of a crystalline phase of titanium dioxide at room temperature without a high temperature and high pressure process and enjoys an economical advantage of being low in production cost.
    • 本发明涉及具有大比表面积的二氧化钛粉末,其制备方法以及二氧化钛作为光催化剂的用途,更具体地说,涉及一种制备二氧化钛粉末的方法,其包括步骤 向纯四氯化钛(TiCl 4)中加入冰块或冰冷的蒸馏水,得到1.5M或更高的氯化钛水溶液; 用蒸馏水稀释二氯氧化钛水溶液; 通过在15-70℃下静置2-20小时从稀释的二氯化钛水溶液中获得沉淀物; 过滤,洗涤和干燥上述沉淀物,得到比表面积为130-200m 2 / g的柔软的发型TiO 2粉末。 本发明的二氧化钛粉末具有高的光催化活性,可以利用先进的氧化工艺(AOP)来利用环境有机污染物来分解环境有机污染物,其中使用太阳能等无公害能源作为 推动力。 该方法允许在室温下在高温高压工艺下形成二氧化钛的结晶相,并且具有生产成本低的经济优点。