Development of a novel graphitic carbon nitride and multiwall carbon nanotube co-doped Ti/PbO2 anode for electrocatalytic degradation of acetaminophen

被引：50

作者：

Chen, Shouxian ^{[1
]}

He, Ping ^{[1
,2
]}

Zhou, Pengcheng ^{[1
]}

Wang, Xuejiao ^{[1
]}

Xiao, Feng ^{[1
]}

He, Qihang ^{[1
]}

Li, Jing ^{[1
]}

Jia, Lingpu ^{[1
]}

Zhang, Hui ^{[2
,3
]}

Jia, Bin ^{[2
,4
]}

Tang, Bin ^{[5
]}

机构：

[1] Southwest Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China

[2] Southwest Univ Sci & Technol, Int Sci & Technol Cooperat Lab Micronanoparticle, Mianyang 621010, Sichuan, Peoples R China

[3] Western Univ, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada

[4] Southwest Univ Sci & Technol, Key Lab Shock & Vibrat Engn Mat & Struct Sichuan, Mianyang 621010, Sichuan, Peoples R China

[5] Southwest Med Univ, Sch Basic Med Sci, Luzhou 646000, Peoples R China

来源：

CHEMOSPHERE | 2021年 / 271卷 / 271期

关键词：

Acetaminophen pharmaceutical wastewater; Ti/PbO2-GCN-CNT electrode; Electrocatalytic degradation; Parameter optimization; Degradation mechanism;

D O I：

10.1016/j.chemosphere.2021.129830

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work, we have constructed a novel graphitic carbon nitride/multiwall carbon nanotube (GCN/CNT) doped Ti/PbO2 as anode for highly effective degradation of acetaminophen (ACE) wastewater. The ACE removal efficiency of 83.2% and chemical oxygen demand removal efficiency of 76.3% are achieved under the optimal condition of temperature 25 degrees C, initial pH 7, current density 15 mA cm(-2) and Na2SO4 concentration 6.0 g L-1. The excellent electrocatalytic activity of Ti/PbO2-GCN-CNTanode for ACE oxidation is ascribed to the effective suppression of oxygen evolution and the enhanced electron transfer after introducing GCN and CNT. Furthermore, Ti/PbO2-GCN-CNT electrode displays excellent stability and reusability. ACE degradation is accomplished by direct oxidation and indirect oxidation, and center dot OH radical plays primary role in the indirect oxidation of ACE wastewater. The intermediates of ACE degradation are detailly investigated using LC-MS analysis and a possible degradation mechanism is proposed. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：13

共 63 条

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