Page 162 - 《精细化工》2022年第4期

第 39 卷第 4 期 精 细 化 工 Vol.39, No.4
2022 年 4 月 FINE CHEMICALS Apr. 2022

水处理技术与环境保护
MnO 掺杂纳米石墨阴极的制备及其
x

对盐酸四环素的降解

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石 宇 ，杨晓婷 ，兰贵红 ，邱海燕 ，徐 波
〔1. 西南石油大学 化学化工学院，四川 成都 610500；2. 长兴化学工业（成都）有限公司，四川 邛崃
611534〕
摘要：采用溶胶-凝胶法和热压法制备了锰氧化物掺杂的纳米石墨（NG）（MnO x /NG）电极，以其为工作电极，
构建了处理水中盐酸四环素（TCH）的阴极电化学体系。运用 SEM、XRD、XPS、CV 和 EIS 对样品及电极进
行了表征。结果表明，MnO x 的掺杂可以明显提高 NG 电极的导电性、电化学稳定性和电化学活性，从而大幅提
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升 TCH 的降解效果。在 TCH 初始质量浓度为 20 mg/L、电流密度为 30 mA/cm 、溶液初始 pH 为 5.0、极板距
离为 10 mm、反应 60 min 时，MnO x /NG 电极对 TCH 的降解效率最佳，为 59.27%，比 NG 电极提高了 18.70%。
此外，MnO x /NG 的阴极电化学体系的处理效能明显高于传统 RuO 2 -IrO 2 /Ti 和钛网阴极。当反应时间延长至 270 min
时，MnO x /NG 电极对 TCH 的降解效率达到了 93.37%，使用 7 次时，电化学反应 60 min 后 TCH 的降解效率仍
可达 48.19%。
关键词：溶胶-凝胶法；盐酸四环素；锰氧化物；电化学氧化；降解；水处理技术
中图分类号：X703；O643.36；O646.541 文献标识码：A
文章编号：1003-5214 (2022) 04-0798-08 开放科学 (资源服务) 标识码 (OSID)：

Preparation of nano graphite cathode doped with MnO x and its

degradation for tetracycline hydrochloride

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SHI Yu , YANG Xiaoting , LAN Guihong , QIU Haiyan , XU Bo
[1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, Sichuan, China;
2. Eternal Chemical (Chengdu) Co., Ltd., Qionglai 611534, Sichuan, China]
Abstract: Manganese oxide doped nano-graphite (NG) (MnO x/NG) electrode was prepared by sol-gel
method and hot pressing method. Then, a cathodic electrochemical system capable of efficiently treating
tetracycline hydrochloride (TCH) in water was constructed. The samples and MnO x/NG electrode were
characterized by SEM, XRD, XPS, CV and EIS. The results demonstrated that MnO x doping could
significantly improve the electrical conductivity, electrochemical stability and electrochemical activity of
NG electrode, thereby significantly enhancing the degradation efficiency of TCH. Under the conditions of
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initial TCH mass concentration of 20 mg/L, current density of 30 mA/cm , initial solution pH of 5.0,
electrode plate distance of 10 mm and reaction time of 60 min, the degradation efficiency of TCH by
MnO x/NG electrode was the highest (59.27%), 18.70% higher than that by NG electrode. Furthermore, the
cathodic electrochemical system of MnO x/NG exhibited obviously higher treatment efficiency than that of
conventional RuO 2-IrO 2/Ti cathode and titanium mesh cathode. The degradation efficiency of TCH by
MnO x/NG cathode reached 93.37% when the reaction time was increased to 270 min. When being used
seven times, the degradation efficiency of TCH could still reach 48.19% after 60 min of electrochemical
reaction.
Key words: sol-gel method; tetracycline hydrochloride; manganese oxides; electrochemical oxidation;
degradation; water treatment technology

收稿日期：2021-09-05; 定用日期：2021-11-12; DOI: 10.13550/j.jxhg.20210895
作者简介：石 宇（1996—），女，硕士生，E-mail：976018782@qq.com。联系人：兰贵红（1976—），男，副教授，E-mail：
guihonglan416@sina.com。