Preparation of titanium dioxide photocatalytic hollow spheres

With coaxial nozzle system, TiO2 hollow spheres were prepared and the optimum parameters of forming TiO2 hollow spheres were fix on as follows: acrylamide (AM) was used as monomer up to 30.3%, acetone was used as vesicant, the mass fraction of initiator was 0.4%, the forming temperature was in the range from 90 °C to 95 °C. The photocatalistic performance of TiO2 hollow spheres was characterized by degradation of methyl orange. Compared with nano-TiO2 powders, hollow spheres can be recycled after cleanout and drying, taking on similar efficiency of photocatalistic.