Pure titanium was treated by micro-arc oxidation in metavannadate and in phosphate electrolytes

respectively. The structure and photo-physical properties of the two films were characterized by XRD （X-ray diffraction）

SEM （scanning electron microscope） and UV-Vis spectroscopy to understand its photocatalytic behavior. The results show that film with smooth surface and homogeneously distributed pore which is prepared in phosphate electrolyte （P-TiO2） is composed of a mixture of anatase and rutile

while the film with rough and less pores prepared in metavanadate electrolyte （V-TiO2） is composed of a mixture of anatase

rutile and V2O5. The band widths of P-TiO2 and V-TiO2 are 3.14eV and 2.28eV

respectively. The degradative rate of rhodamine is raised from 30% （P-TiO2） to 61%（ V-TiO2）.