铟掺杂PbO2电极制备及电催化降解强力霉素

采用电沉积技术制备了铟掺杂PbO₂电极 （In-PbO₂）. 利用扫描电子显微镜 （SEM）、X射线衍射 （XRD）、循环伏安 （CV）、极化曲线 （LSV）、强化寿命试验和荧光光谱分析了铟掺杂对电极物理、电化学性能的影响，并考察了铟掺杂PbO₂电极对强力霉素模拟废水的电催化降解能力.结果表明，与未掺杂PbO₂电极相比， In掺杂后PbO₂电极表面更加平整致密，裂纹数量减少，晶粒明显细化，比表面积增加，产生羟基自由基的能力增强.当掺杂量为2g/L，制备的电极电化学性能最高，析氧电位最高（1.73V），电极强化寿命从84h提高到148h.电解150min后，强力霉素降解率、TOC去除率、矿化电流效率（MCE）分别为98.2%、30.4%和3.01%，优于未掺杂PbO₂电极（90.1%、26.4 %、2.63%）.

Preparation of Indium doped PbO2 electrode and its electrocatalytic degradation of doxycycline

An Indium doped PbO₂ electrode (In-PbO₂) was fabricated by using an electrodeposition technique. The influences of In doping on the morphology, structure and electrochemical properties of the electrode were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), cyclic voltammetry (CV), linear sweep voltammetry (LSV), accelerated life test and fluorescence spectrophotometry. Compared with the pure PbO₂ electrode, the surface of In-PbO₂ electrode was uniform and dense with less number of cracks, and the grains were refined, which increased the surface area and enhanced its ability of producing hydroxyl radicals. When the In doping amount was 2g/L, the corresponding electrode showed the best electrochemical performance with highest oxygen evolution potential (1.73V). The accelerated life of the electrode was increased from 84h to 148h. After electrolysis for 150min, the degradation rate of doxycycline, TOC removal rate and mineralization current efficiency (MCE) of this electrode were 98.2%, 30.4% and 3.01% respectively, which were higher than those of undoped PbO₂ electrode (90.1%, 26.4%, 2.63%).