| 摘要 |
PURPOSE: Provided is a simple preparation method of brookite TiO2 nanoparticles by regulating the concentration of HNO3 in a titanium solution and forming precipitates at low temperature. CONSTITUTION: The preparation method of brookite nanoparticle TiO2(50-100nm) comprises the steps of: preparing a titanium solution containing 0.05-10.0M of HNO3 by dropping 0.001-16.0M of HNO3 to TiCl4 to get a titanium stock solution, and adding aqueous HNO3 and distilled water; standing the solution at 30-80deg.C, preferably 80-200deg.C, to form precipitates; collecting precipitates and adjusting the pH of the solution between 2-8 with an alkali solution, non metal hydroxide solution such as NaOH, KOH or NH4OH; collecting precipitates from the solution; washing formed precipitates with water to remove remained bases; drying formed precipitates at room temperature for 48hrs. |
