摘要
为提升PbO_2电极的寿命,降低电极阻抗,利用直流电沉积法制备了2种添加中间层的钛基PbO_2电极,并研究了其电催化氧化降解煤化工废水的效能。结果表明:向钛基PbO_2电极添加锡锑氧化物和二氧化钛纳米管中间层,使PbO_2电极的使用寿命分别提高到未添加中间层电极的209倍和301倍,阻抗分别降低至未添加中间层电极的11. 58%和6. 20%。在20 m A/cm^2电流密度下处理煤化工废水,与未添加中间层的电极相比,添加锡锑氧化物中间层的钛基PbO_2电极对COD、总酚的去除率变化不大,而添加二氧化钛纳米管中间层的钛基PbO_2电极对COD、总酚的去除率略有降低。由于锡锑氧化物中间层有效改进了电极性能,建议在使用钛基PbO_2电极电催化氧化降解煤化工废水时添加锡锑氧化物中间层。
To improve the longevity of PbO2 electrode and to reduce the electrode impedance, two Ti-based PbO2 electrodes with intermediate layer were prepared by DC electrodepsition. The efficiency of electrocatalytic oxidation of coal chemical wastewater was studied. The results showed that, adding an intermediate layer of tin and antimony oxide to the PbO2 electrode increased the longevity to 209 times and reduced the impedance to 11. 58%,while adding an intermediate layer of titania nanotube increased the longevity to 301 times and reduced the impedance to 6. 20%. In the treatment of coal chemical wastewater with 20 mA/cm^2 current density, in comparison with PbO2 electrode without intermediate layer, the COD and total phenol removal rate remained the same when using the PbO2 electrode with tin and antimony oxide intermediate layer, and the removal rate slightly decreased when using the PbO2 electrode with TiO2 nanotube intermediate layer. Since the addition of the tin and antimony oxide intermediate layer has effectively improved the performance of the electrode, it is recommended in the treatment of coal chemical wastewater when using the PbO2 electrode.
作者
李佳欣
陈野
韩洪军
陈志强
LI Jia-xin;CHEN Ye;HAN Hong-jun;CHEN Zhi-qiang(State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China;College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 , China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第3期111-116,共6页
China Water & Wastewater
基金
国家重点研发计划项目(2016YFB0600502)
黑龙江省级特别资助项目(GX17C003)
关键词
煤化工废水
钛基PbO2电极
锡锑氧化物中间层
电催化氧化
coal chemical wastewater
Ti-based PbO2 electrode
tin and antimony oxide intermediate layer
electrocatalytic oxidation
