Electrochemical Performance of Doped SnO2 Coating on Ti Base as Electrooxidation Anode

The performance of electrode for the electrochemical treatment of organic contaminants was improved using Ce-doped Ti/SnO2-Sb electrodes prepared by a thermal deposition method. Cyclic voltammetry (CV) and Amperometric i-t Curve were measured showing an improvement of electrochemical feature for the Ti/SnO2-Sb-Ce electrode. The electrochemical oxidation performance of the prepared electrode was investigated using aniline as a model pollutant. The aniline removal of 98.3% was achieved with the Ti/SnO2-Sb-Ce electrode after 2 h electrolysis while it was only 82.7% for the Ti/SnO2-Sb electrode. The removal of chemical oxygen demand (COD) was 80.5% on the Ti/SnO2-Sb-Ce electrode which was also higher than that on the Ti/SnO2-Sb electrode (58.4%). The electrode was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), electron dispersive spectrometry (EDS), and X-ray photoelectron spectroscopy (XPS). The results show that the coating had larger surface area and higher active Oads content due to Ce doping, which could provide with more active sites for electrochemical oxidation of organic pollutants.