AEO-7改性PbO_2电极电催化降解结晶紫

Electrocatalytic degradation of crystal violet by a PbO_2 electrode modified by AEO-7

通过在镀液中添加表面活性剂AEO-7,以不锈钢为基体,利用阳极氧化法制备了改性PbO2电极.同时,在结晶紫模拟废水中对比了改性前后PbO2电极的阳极极化曲线和塔菲尔曲线,并对质量浓度为10mg·L-1的结晶紫模拟废水进行了电催化降解实验.实验结果表明,制备的改性PbO2电极对结晶紫废水的降解显示出了较好的电催化活性,最佳电解实验条件为:电解电流密度30mA·cm-2,支持电解质Na2SO4浓度5g·L-1,处理温度35℃,在此条件下电解40min后,结晶紫的去除率可达到90%以上.

A set of PbO2 electrode modified by surface active agent AEO-7 was prepared on stainless steel substrate by anodic oxidation. The polarization curves and Tafel curves of modified and unmodified PbO2 electrodes were compared in simulated crystal violet wastewater. The electrocatalytic degradation experiment was carried out in simulated wastewater with 10 mg ·L^-1 crystal violet. It was found that the modified electrode showed better electrocatalytic activity than the unmodified one. The optimum process conditions were determined as follows： current density 30 mA·cm^-2, electrolyte Na2SO4 concentration 5 g·L^-1, and treatment temperature 35 ℃. After 40 min of electrolysis, the removal rate of crystal violet can reach above 90%.