The mesoporous silicas were impregnated by vion solution and calcined in air at 400 °C,the investigation indicated not only vanadium in samples prepared by impregnation method was incorporated into the famework of mesoporous silicas,but also some dispersed spontaneously onto the surface of mesoporous silicas,and formed a monolayer if total amount of V2O5 increased.

Silica-supported H_3PW_ 12 O_ 40 catalysts were prepared by the impregnation method, sol-gel technique, and sol-gel technique using ionic liquids as the template, respectively, to solve the problems of H_3PW_ 12 O_ 40 such as low surface area, difficult separation, and reuse.

Eu-doped TiO2 samples were prepared by the sol-gel method,and further doping which uses ammonia as nitrogen source were carried out by the impregnation method.

This experiment studied the influence of sorption by the concentration, the time of dipping and the time of adsorption.

The sol-gel dipping method has been used to manufacture TiO2-SiO2 multilayer.

Silver and praseodymium co-doped titanium oxide[(Ag,Pr)/TiO2]nanometer materials were prepared by the dipping method using Pr(NO3)3.

Using fiber glass cloth as the carrier,the titania photo-catalyst coated on fiber glass cloth was prepared by the dipping method and the adhesive method.