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Co/Sm-modified Ti/PbO2 anode for atrazine degradation: Effective electrocatalytic performance and degradation mechanism.
Chemosphere. 2021 Apr; 268:128799.C

Abstract

In this work, Ti/PbO2-Co-Sm electrode has been successfully prepared using electrodeposition and further applied for the electrocatalysis of atrazine (ATZ) herbicide wastewater. As expected, Ti/PbO2-Co-Sm electrode displays highest oxygen evolution potential, lowest charge transfer resistance, longest service lifetime and most effective electrocatalytic activity compared with Ti/PbO2, Ti/PbO2-Sm and Ti/PbO2-Co electrodes. Orthogonal and single factor experiments are designed to optimize the condition of ATZ degradation. The maximum degradation efficiency of 92.6% and COD removal efficiency of 84.5% are achieved in electrolysis time 3 h under the optimum condition (current density 20 mA cm-2, Na2SO4 concentration 8.0 g L-1, pH 5 and temperature 35 °C). In addition, Ti/PbO2-Co-Sm electrode exhibits admirable recyclability in degradation progress. The degradation of ATZ is accomplished by indirect electrochemical oxidation and ∙OH is tested as the main active substance in ATZ oxidation. The possible degradation mechanism of ATZ has been proposed according to the degradation intermediates detected by LC-MS. This research suggests that Ti/PbO2-Co-Sm is a promising electrode for ATZ degradation.

Authors+Show Affiliations

State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China; International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China. Electronic address: heping@swust.edu.cn.State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, PR China.International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China; Department of Chemical and Biochemical Engineering, Western University, London, Ontario, N6A 5B9, Canada.International Science and Technology Cooperation Laboratory of Micro-nanoparticle Application Research, Southwest University of Science and Technology, Mianyang, 621010, PR China; Key Laboratory of Shock and Vibration of Engineering Materials and Structures of Sichuan Province, Southwest University of Science and Technology, Mianyang, 621010, PR China.College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, PR China. Electronic address: liuht@csu.edu.cn.School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, Sichuan, PR China. Electronic address: tangbin8888@163.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33187658

Citation

Chen, Shouxian, et al. "Co/Sm-modified Ti/PbO2 Anode for Atrazine Degradation: Effective Electrocatalytic Performance and Degradation Mechanism." Chemosphere, vol. 268, 2021, p. 128799.
Chen S, He P, Wang X, et al. Co/Sm-modified Ti/PbO2 anode for atrazine degradation: Effective electrocatalytic performance and degradation mechanism. Chemosphere. 2021;268:128799.
Chen, S., He, P., Wang, X., Xiao, F., Zhou, P., He, Q., Jia, L., Dong, F., Zhang, H., Jia, B., Liu, H., & Tang, B. (2021). Co/Sm-modified Ti/PbO2 anode for atrazine degradation: Effective electrocatalytic performance and degradation mechanism. Chemosphere, 268, 128799. https://doi.org/10.1016/j.chemosphere.2020.128799
Chen S, et al. Co/Sm-modified Ti/PbO2 Anode for Atrazine Degradation: Effective Electrocatalytic Performance and Degradation Mechanism. Chemosphere. 2021;268:128799. PubMed PMID: 33187658.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Co/Sm-modified Ti/PbO2 anode for atrazine degradation: Effective electrocatalytic performance and degradation mechanism. AU - Chen,Shouxian, AU - He,Ping, AU - Wang,Xuejiao, AU - Xiao,Feng, AU - Zhou,Pengcheng, AU - He,Qihang, AU - Jia,Lingpu, AU - Dong,Faqin, AU - Zhang,Hui, AU - Jia,Bin, AU - Liu,Hongtao, AU - Tang,Bin, Y1 - 2020/11/06/ PY - 2020/07/23/received PY - 2020/09/30/revised PY - 2020/10/22/accepted PY - 2020/11/15/pubmed PY - 2021/2/11/medline PY - 2020/11/14/entrez KW - Atrazine pesticide wastewater KW - Condition optimization KW - Electrochemical oxidation KW - Hydroxyl racial KW - Mechanism analysis KW - Ti/PbO(2)–Co-Sm electrode SP - 128799 EP - 128799 JF - Chemosphere JO - Chemosphere VL - 268 N2 - In this work, Ti/PbO2-Co-Sm electrode has been successfully prepared using electrodeposition and further applied for the electrocatalysis of atrazine (ATZ) herbicide wastewater. As expected, Ti/PbO2-Co-Sm electrode displays highest oxygen evolution potential, lowest charge transfer resistance, longest service lifetime and most effective electrocatalytic activity compared with Ti/PbO2, Ti/PbO2-Sm and Ti/PbO2-Co electrodes. Orthogonal and single factor experiments are designed to optimize the condition of ATZ degradation. The maximum degradation efficiency of 92.6% and COD removal efficiency of 84.5% are achieved in electrolysis time 3 h under the optimum condition (current density 20 mA cm-2, Na2SO4 concentration 8.0 g L-1, pH 5 and temperature 35 °C). In addition, Ti/PbO2-Co-Sm electrode exhibits admirable recyclability in degradation progress. The degradation of ATZ is accomplished by indirect electrochemical oxidation and ∙OH is tested as the main active substance in ATZ oxidation. The possible degradation mechanism of ATZ has been proposed according to the degradation intermediates detected by LC-MS. This research suggests that Ti/PbO2-Co-Sm is a promising electrode for ATZ degradation. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/33187658/Co/Sm_modified_Ti/PbO2_anode_for_atrazine_degradation:_Effective_electrocatalytic_performance_and_degradation_mechanism_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)32997-0 DB - PRIME DP - Unbound Medicine ER -