电化学
电极
阳极
电解
材料科学
石墨烯
化学工程
析氧
无机化学
化学
纳米技术
电解质
物理化学
工程类
作者
Danhong Wu,Cong He,Feng Yang,Yangcheng Ding,Yan Yan,Xiangyang Ma,Huajun Feng,Yijing Xia
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2023-07-01
卷期号:170 (7): 073505-073505
标识
DOI:10.1149/1945-7111/ace556
摘要
A novel graphene nanoplatelet (GN)-doped PbO 2 electrode was fabricated and utilized to pulse electrochemical oxidize carbamazepine (CBZ) in aquesous solution. The GN-PbO 2 electrode differed from a pure PbO 2 electrode in that it exhibited higher surface roughness, smaller particle size, larger specific surface area, greater oxidation peak current, smaller charge transfer resistance, and higher oxygen evolution potential. After electrolysis for 90 min, 94.74% of CBZ and 45.15% of chemical oxygen demand could be removed at an initial pH of 3, pulsed frequency of 3000 Hz, current density of 20 mA cm −2 , and pulsed duty cycle of 50%. Additionally, the primary electrochemical oxidation mechanism at the GN-PbO 2 anode was indirect radical oxidation and the degradation pathway of CBZ in pulsed electrochemical oxidation was investigated and clarified considering the identified intermediate products and theoretical computations. The results demonstrate that pulsed electrochemical oxidation based on GN-PbO 2 electrodes is a promising approach to increasing the viability of pharmaceutical wastewater treatment by electrochemical technologies.
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