Study on the Properties of Photocatalytic Degradation of DMP on WO_3/TNAs Photoelectrodes

摘要

In this study, WO_3/TiO_2 nanotube array photoelectrodes were fabricated by anodic oxidation and electro-deposition method. The effects of WO_3, H_2O_2, oxygen, and pH value were investigated in the degradation of Dimethyl phthalate (DMP). Results show that the photocatalytic property of the photoelectrode was improved by the modification of WO_3. The degradation rate of DMP was increased by 9.3% after 120min irradiation. H_2O_2 could significantly promote the degradation of DMP. The degradation rate of DMP was increased by 27.9% and arrived 97.5% after 120 min irradiation. A certain amount of O_2 added to the solution had positive effect on the degradation of DMP. While excessive O_2 would undermine the degradation. The degradation rate of DMP was improved in both acidic condition and alkaline condition. It was separately increased by 38.4% and 40.2% at the pH value of 3.0 and 7.0, compared with that of pH = 7.