Study On The Influence Of Preparation Parameters On Sb-SnO₂ Coatings And Their Performance

Modern society increasingly relies on a reliable supply of clean water.Water treatment has become a global concern,especially as traditional wastewater treatment technologies often fail to degrade industrial effluent’s refractory organics.In recent years,the electrocatalytic oxidation process has emerged as a highly effective alternative.The anode materials are crucial in driving the electrochemical oxidation reactions against refractory organics,and titanium-based antimony doped tin oxide（Ti/Sb-Sn O₂）shows considerable promise as an ideal anode material for efficient and long-lasting effluent treatment.Although previous studies have found that the Ti/Sb-Sn O₂ electrode prepared by electrodeposition method exhibits good stability,its electrocatalytic degradation capability is inferior.Therefore,this study focuses on the electrodeposited Ti/Sb-Sn O₂ electrode system and aims to achieve both superior electrocatalytic ability and long-term stability.In this paper,the optimized Ti/Sb-SnO₂ electrode with monolayer and bilayer structures were prepared by electrodeposition,achieving huge enhance in coating performance.This was achieved by controlling the preparation parameters and modifying the coating structure.The main findings of this paper are as follows:（1）Complete coating coverage of a matrix is a fundamental requirement for its application.To meet this requirement,we utilized direct current plating and adjusted the solution formula to enhance coating integrity and bonding strength.In our study,we focused on the structural changes of monolayer electrodes,showing anode materials with good adsorption and conductivity provide more active sites for hydroxyl radicals.We determined that the optimal morphological structure can be achieved with a current density of 30 m A/cm2,a temperature of 600℃,and a Sb doping concentration of 5%.（2）Performance tests have shown that an excellent morphological structure can result in high electrode performance.The single-layer electrode with optimal parameters displayed an oxygen evolution potential of 1.89 V,an accelerated life of 1.8h,and an electrode degradation rate of 71%after 5h degradation of benzoic acid.（3）To further enhance the electrode’s performance,we used a structure modification method to prepare a double-layer electrode.After screening various preparation parameters,the optimal parameters included a current density of 40 m A/cm2,annealing at 600℃,and a doping Sb concentration of 5%.The oxygen evolution potential reached 2.41V for the prepared electrode,with an accelerated life of 5h.The electrode’s degradation rate of benzoic acid reached 78%after 5h degradation.Our findings demonstrate the potential for enhancing electrode performance through structure modification methods.