Degradation of methyl orange (MO) waste water was conducted by electrochemical oxidation method with PbO 2 /Ti electrode as anode. PbO 2 /Ti electrode was fabricated by electrochemical deposition of PbO 2 on Ti foil. The micrograph and crystal structure of PbO 2 show that uniform coating of PbO 2 on titanium foil was obtained and the dominant crystal structure was β-PbO 2 . Degradation experiments of MO solution indicate that the degradation rate increased with cell voltage and solution

more »

... vity. In addition, air aeration also improved the degradation of MO solution; but an increase in cell voltage or input energy decreased the energy efficiency of MO removal. The energy efficiency reached over 0.1mg kJ -1 under a cell voltage lower than 15V, and the removal rate could reach 90%.