Abstract: Because the density is relatively large,the inorganic electrophoretic particles are easy to deposit and can not be preferably dispersed in media.With monolayer core shell polymer particles as template,hollow black titanium  oxide (TiO) ultramicron/nano particles were prepared via  wet chemistry preparation by depositing tetrabutyl titanate on the surface of template.Coating modifications to TiO were carried out by SiO₂,Al₂O₃,and sodium dodecyl benzene sulfonate (SDBS) and the products were characterized by FT-IR,XRD,SEM,and TEM.Electrophoretic mobility and Zeta potentials were determined by micro electrophoresis apparatus.Results showed that hollow framework could reduce the density of particles,and the dispersion and Zeta potential of particles had distinct change after modification.When TiO particles were modified by Al₂O₃,the electrophoretic properties were improved apparently.TiO particles modified by Al₂O₃ had good electrophoretic properties,and the Zeta potential was up to 40.70 mV.

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