摘要
主要研究了Ti/PbO_(2)电极与Ti/IrO_(2)+Ta_(2)O_(5)电极催化氧化体系对茜素绿(AG)染料废水的催化降解效果。结果表明,当AG初始浓度100 mg/L,电解质浓度0.1 mol/L,电流密度30 mA/cm^(2),pH 5.86,处理70 min后,Ti/PbO_(2)电极和Ti/IrO_(2)+Ta_(2)O_(5)电极催化氧化体系对AG和化学需氧量(COD)的处理效率分别高于81.4%和51.6%。相较于Ti/IrO_(2)+Ta_(2)O_(5)电极,具有四棱锥形结构晶粒的Ti/PbO_(2)电极稳定性较高,且Ti/IrO_(2)+Ta_(2)O_(5)电极表面由于存在干泥状裂痕结构,工作过程中易出现表面局部剥落现象,形成的TiO_(2)钝化膜则会导致槽压升高和电极活性下降,影响体系的催化氧化效率。
In this work,the degradation efficiencies of alizarin green(AG)by Ti/PbO_(2)electrode and Ti/IrO_(2)+Ta_(2)O_(5)electrode were studied.The optimal degradation conditions were obtained:initial AG concentration of 100 mg/L,Na_(2)SO_(4) concentration of 0.1 mol/L,the current density of 30 mA/cm 2,and pH 5.86.After being treated under this specific optimal condition for 70 min,the removal rates of AG and COD were higher than 81.4%and 51.6%,respectively.Compared with Ti/IrO_(2)+Ta_(2)O_(5)electrode with a mud-cracked surface,the Ti/PbO_(2)electrode possessed higher stability due to its pyramid crystal structure.Because of the surface spalling phenomenon observed during the degradation experiments,passivated TiO_(2)film was formed,leading to the increase of cell voltage and degraded electrocatalytic oxidation capability.
作者
沈宏
章维维
姚春冀
杨叶
范宏亮
鞠莉
SHEN Hong;ZHANG Wei-wei;YAO Chun-ji;YANG Ye;FAN Hong-liang;JU Li(College of Public Health,Hangzhou Medical College,Hangzhou 310007,China;Hangzhou Jiashu Environmental Monitoring Co.,Ltd.,Hangzhou 311000,China)
出处
《化学试剂》
CAS
北大核心
2022年第6期880-887,共8页
Chemical Reagents
基金
浙江省医药卫生科技计划资助项目(2019KY362)
浙江省自然科学基金青年基金资助项目(LQ19H260004)。
