CAJ | 학술논문

采用电沉积法制备了Ti/TiO2-NTs/PbO2、Ti/TiO2-NTs/Ce-PbO2、Ti/TiO2-NTs/Fe-PbO2三种电极,采用X射线衍射( XRD)、线性伏安扫描( LSV)、电极加速寿命等手段分别对所制备电极进行了表征,并以邻甲酚作为目标污染物评价了电极的电催化活性。研究结果表明,被Fe、Ce修饰后的两种PbO2电极的析氧电位、稳定性、电催化活性均高于未修饰电极,且所制备的三种电极的活性催化层均为β型PbO2,邻甲酚在三种电极上的电催化降解反应均遵守一级反应动力学规律。其中被Fe修饰的PbO2电极是降解邻甲酚综合性能最佳的电极,该电极析氧电位为2．12 V,当电流密度为10 mA/cm2时对邻甲酚去除率为99．74%, COD去除率为60．31%,加速寿命是未修饰电极的2．6倍。
채용전침적법제비료Ti/TiO2-NTs/PbO2、Ti/TiO2-NTs/Ce-PbO2、Ti/TiO2-NTs/Fe-PbO2삼충전겁,채용X사선연사( XRD)、선성복안소묘( LSV)、전겁가속수명등수단분별대소제비전겁진행료표정,병이린갑분작위목표오염물평개료전겁적전최화활성。연구결과표명,피Fe、Ce수식후적량충PbO2전겁적석양전위、은정성、전최화활성균고우미수식전겁,차소제비적삼충전겁적활성최화층균위β형PbO2,린갑분재삼충전겁상적전최화강해반응균준수일급반응동역학규률。기중피Fe수식적PbO2전겁시강해린갑분종합성능최가적전겁,해전겁석양전위위2．12 V,당전류밀도위10 mA/cm2시대린갑분거제솔위99．74%, COD거제솔위60．31%,가속수명시미수식전겁적2．6배。
Ti/TiO2-NTs/PbO2 , Ti/TiO2-NTs/Ce-PbO2 and Ti/TiO2-NTs/Fe-PbO2 electrodes were prepared by electrodeposition technique. Essential characterizations were conducted including X-ray diffraction( XRD) ,linear sweep voltammetry( LSV) ,and ac-celerated lifetime test,and their electric catalytic oxidation properties for pollutant degradation were tested using o-Cresol as a mod-el. Results showed that the modified electrodes not only possessed higher oxygen evolution potential but had better stability and bet-ter electrocatalytic activities compared with Ti/TiO2-NTs/PbO2. XRD? analysis indicated that the surfaces of the prepared elec-trodes were covered with β-PbO2 . It was also found that degradation of o-Cresol followed first-order kinetics equation. The Fe doped PbO2 electrode possessed the highest OEP of 2. 12 V,over 99. 74%of o-Cresol was degraded and over 60. 31%COD removal was a-chieved as the current density was 10 mA/cm2. Besides,the service lifetime of Ti/TiO2-NTs/Fe-PbO2 electrode was 2. 6 times lon-ger than that of the Ti/TiO2-NTs/PbO2 electrode without Fe modifying.