Improved Stober method for preparing tio2/sio2 aerogel microsphere

The invention relates to an improved Stober method for preparing a TiO2/SiO2 aerogel microsphere. The improved Stober method comprises the steps of (1) preparing a titanium dioxide suspension liquid; (2) preparing mixed sol of tetramethoxysilane or tetraethoxysilane and alcohol; (3) preparing a mixed solution of ammonia water and ethanol; (4) reacting the mixed sol and the mixed solution; (5) adding fluoroalkyl silane self-assembly solution into the solution obtained in the step (4), and further reacting; and (6) centrifugally cleaning the solution obtained in the step (5), and drying to obtain the TiO2/SiO2 aerogel microsphere. The improved Stober method provided by the invention is carried out at normal pressure and is mild in condition, low in reaction temperature not higher than 80 DEG C, not high in equipment requirement and capable of reducing production cost and improving production safety. The TiO2/SiO2 aerogel microsphere prepared by using the method disclosed by the invention has the particle size of 200-750nm, is smooth in surface, relatively good in monodispersity, good in integrity and free of fragmentation or cracks, has the advantages of high transparency, good hydrophobicity and infrared reflectivity, low heat conductivity and the like and has a wide application prospect in the field of buildings such as coatings and coiled materials.