文献类型：期刊文献

英文题名：Stabilized Hf-doped Ti/Sb-SnO2 electrode for efficient degradation of tetracycline

作者：Li, Danni[1]; Guo, Xin[1]; Shao, Xiang[1]; Zhou, Anhui[1]; Zhu, Lin[1]; Zhang, Yuting[1]; Li, Binbin[1]; Du, Yan[1]; Cao, Limei[1]; Yang, Ji[1,2]

机构：[1] State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control On Chemical Processes, School of Resources and Environmental Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China; [2] Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China

年份：2024

卷号：31

期号：35

起止页码：47960

外文期刊名：Environmental Science and Pollution Research

收录：EI(收录号：20242916726156)

语种：英文

外文关键词：Antimony - Carboxylation - Electrocatalysis - Electrochemical electrodes - Electrochemical oxidation - Reaction intermediates - Reaction kinetics - Tin - Wastewater treatment

摘要：The electrochemical advanced oxidation process (EAOP) has shown significant promise in the field of refractory organic wastewater treatment due to its high efficiency and environmentally friendly nature. In this study, Ti/Sb-SnO2 electrodes with varying proportions of Hf were prepared using the sol–gel method. The addition of Hf transformed the original collapsing and broken surface into a flat and regular surface. The results demonstrated that Ti/Sb-SnO2-Hf electrode doped with 6% Hf exhibited a higher oxygen evolution potential (OEP) and excellent stability. The OEP increased from 2.315 V without Hf-doping to 2.482 V, and the corresponding actual life was 321.05% higher than that without Hf. The current density (5–40 mA·cm?2), electrolyte concentration (0.02–0.2 mol·L?1), pH (3–11), and initial pollutant concentration (5–80 mg·L?1) were evaluated to confirm the tetracycline (TC) degradation characterization of Ti/Sb-SnO2-6%Hf electrodes. It was concluded that under the optimal degradation conditions, the removal rate of TC could reach 99.66% within 2 h. The degradation of TC follows first-order reaction kinetics. The oxidative degradation of TC was achieved through indirect oxidation, with ·OH playing a dominant role. TC’s electrochemical oxidation degradation pathway has been proposed: Based on LC–MS results, three main pathways are speculated. During the electrocatalytic oxidation process, decarboxylation, deamidation, and ring-opening reactions occur under ·OH attack, producing intermediate compounds with m/z values of 427, 433, 350, 246, 461, 424, 330, 352, 309, 263, and 233. These intermediates are further oxidized to intermediate compounds with an m/z value of 218. This work introduces a new efficient anode electrochemical catalyst for the degradation of TC, providing a strategy for industrial applications. ? The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.