On effect of silver deposition on photocatalytic activity of TiO_2/Ti using micro-arc oxidation

The present article aims to study the effect of silver deposition on photocatalytic activity of the TiO_2/Ti with micro-arc oxidation.In order for the Titanium oxide coatings to be formed on the titanium net surface by micro-arc oxidation(MAO) in Na_3PO_4 solution with an AC power supply,it is necessary to use the photodeposition method to prepare the Ag/TiO_2/Ti phtotoatalyst with varying Ag loadings.In doing so,it is necessary to characterize and evaluate the structures and photocatalytic ability of titanium oxide coatings before and after the surface AgNO_3 photodeposition is treated by XRD,SEM,EDX and photocatalytic degradation of direct fast blue aqueous solution,respectively.The results show that the titanium oxide film is mainly made of titanium and anatase.Meanwhile,the titanium oxide films photocatalytic activity proves to be related with electrolyzed time and its photocatalytic degradation rate is low for the anatase content at the titanium oxide film surface.In this condition,the Ag loading can help to enhance the TiO_2/Ti films photocatalytic activity greatly.When AgNO_3 aqueous concentration is 2 g·L~(-1) and photodeposition time is 30 min,the TiO_2/Ti films photocatalytic degradation rate will increae from 9.8% to 26% in 120 min.