Preparation of PS@TiO2 composited particles and their visible light photocatalytic properties

PS@TiO2 core-shell composited particles (CSCPs) were prepared by self-assembly technique. Photocatalytic activity of PS@TiO2 CSCPs for the degradation of Rhodamine B (RB) is much better than that of pure PS or TiO2 particles. Results suggest that PS@TiO2 CSCPs with four layers of TiO2 colloids shell show the optimum photocatalytic activity. When the solution concentration of HCl is 0.6 M and the size of PS particle cores are 2 mu m, the as-prepared PS@TiO2 CSCPs have the optimum synergistic photocatalytic activity. The PS@TiO2 CSCPs materials obtained by this method can be used to degrade the RB dye efficiently.