Batch Preparation of TiO_2 Hollow Spheres by Templating Against PSA-A Latex

With Ti(SO4)2 as raw material, and water as dispersion medium, the PSA-A latex/titanium hydrolysis compounds core-shell microspheres were prepared by templating against PSA-A latex with carboxyl. The TiO2 hollow spheres of 450nm were obtained by calcining the as-prepared core-shell microspheres. TG-DSC, SEM, TEM, IR and XRD measurements were used to characterize the samples. The investigations of the core-shell formatting process and the effect of experimental conditions on pH value changes indicated that the varing rate of pH value was the determining factor for a successful coating. The optimum varing rate of pH value for core-shell microspheres formation was obtained and TiO2 hollow spheres were prepared in batches under the conditions of 230g/L PSA-A latex and 1mol/L Ti(SO4)2.