High-Performance Electrochemical Degradation of Methylene Blue by a Ti4O7 Anode Prepared via Industrial Tailing Titanium Powder

A low-cost, safe, and environmentally friendly preparation method, TiO 2 reduced with self-made TiH 2 via industrial tailing titanium powder, is successfully carried out to fabricate Ti 4 O 7 powder, then a Ti 4 O 7 electrode is prepared by the current powder and used to degrade methylene blue (MB). The phase, morphology, and conductivity of the Ti 4 O 7 powder and electrode are studied, showing that our method can obtain a single-phase powder at a lower temperature, and the Ti 4 O 7 electrode conductivity (1048.6 S/cm) is 44.2% higher than the graphite electrode. The effects of current density, electrolyte concentration, and initial MB concentration on MB removal rate are studied. These results show that both low and high concentrations of MB could achieve rapid degradation in the electrochemical oxidation system using the Ti 4 O 7 electrode under low current density (10 mA/cm 2 ), and the removal rate is better than other electrode materials including Pt, Ti/SnO 2 and Pt/MnO 2 . In addition, the kinetic process of electrochemical oxidation and degradation of MB on Ti 4 O 7 electrode is investigated and conformed to the first-order kinetic model.