Research Progress on Electrochemical Oxidaiton of Aqueous Organic Pollutants Through Ti/SnO2-Sb Anodes

The proliferation of persistent and toxic organic contaminants necessitates the development of efficient advanced oxidation processes (AOPs). Electrocatalytic oxidation, particularly using dimensionally stable anodes (DSA) like Ti/SnO2-Sb, presents a promising solution due to its high efficiency and environmental compatibility. The review details the primary preparation methods for Ti/SnO2-Sb electrodes, including thermal decomposition, electrodeposition, chemical vapor deposition, hydrothermal synthesis, and the widely used sol-gel method, analyzing their respective advantages and limitations. To address the electrode's key drawbacks of limited service life and moderate catalytic activity, various modification strategies are discussed, categorized into doping modification (using rare earth or precious metals) and structural modification (involving interlayers or 3D substrate architectures). These modifications significantly enhance electrode stability, oxygen evolution potential, and pollutant degradation efficiency. Furthermore, the successful application of modified Ti/SnO2-Sb electrodes in treating diverse wastewaters, such as dyeing, medical, and petrochemical effluents, is highlighted, demonstrating high removal rates for target pollutants and chemical oxygen demand (COD). This review underscores the potential of optimized Ti/SnO2-Sb electrodes as effective anodes for electrocatalytic water treatment and identifies ongoing research directions for improving their performance and durability.