The fabrication of Ti4O7 particle composite modified PbO2 coating electrode and its application in the electrochemical oxidation degradation of organic wastewater

Abstract A novel Ti/PbO2 electrode modified with Ti4O7 was synthesized through electrochemical deposition method. The surface morphology and electrochemical performance of the as-prepared electrodes were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Transmission Electron Microscope (TEM), Cyclic Voltammetry (CV), Linear Sweep Voltammetry (LSV), Electrochemical Impedance Spectroscopy (EIS), etc. The characterization results indicated that Ti4O7 composite modification improved the surface morphology and crystal plane orientation of the PbO2 coating electrodes and reduced the interplanar spacing of PbO2. Phenol was chosen as the model pollutant to evaluate electrochemical activity of the electrode. The Ti4O7 with 1.0 g L-1 below 500 mesh modification electrodes presented the highest removal efficiency (97.8%) on degradation of phenol, which could be attributed to its high oxygen evolution potential (OEP) and more electrode active sites.