首页|氮氧双掺杂多孔碳对四环素的电吸附及其机制

氮氧双掺杂多孔碳对四环素的电吸附及其机制

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四环素(TC)约占抗生素总产量和使用量的三分之一，且在水体中难以被降解，导致其在环境中的浓度越来越高而引发难以预估危害的细菌耐药性。因此，开发有效途径对水中四环素进行高效去除具有重要现实意义。本文通过简单的分散聚合物制备了具有高四环素吸附效率的聚酰亚胺衍生碳材料(FCPI)。FCPI独特的分级多孔结构、丰富的氧(14。6％)、氮(4。7％)掺杂量和边缘缺陷等可为四环素的吸附提供丰富的活性位点;较大的比表面积、良好的导电性和化学稳定性，可提供稳定的双电层吸附界面。因此，将FCPI制备成电容去离子(CDI)器件的电极片后，FCPI对TC的电吸附容量高达989。5 mg g-1，是传统自吸附的2。3倍(430。2 mg·g-1)。FCPI在自然水体中，经过200次吸-脱附循环后吸附容量仍可保持70％以上，具有优异的再生性和循环稳定性。且FCPI在不同水体中均表现出高效的TC吸附性能和同步去除水体中硬度离子的能力，使其在处理复杂水体污染与环境保护方面具有重要的实际意义。
The electro-adsorption of nitrogen and oxygen co-doped porous carbon for tetracycline and its mechanism
Tetracycline(TC)accounts for approximately one-third of the total production and usage of antibiotics and is known for its resistance to degradation in water.As a result,its concentration in the environment continues to rise,posing unpredictable risks associated with bacterial resistance.Therefore,it is crucial to develop effective methods for the efficient removal of TC from water.In this study,a polyimide-derived carbon material(FCPI)with high tetracycline adsorption efficiency was prepared via a simple dispersion polymerization process.FCPI exhibits a unique hierarchical porous structure,enriched with a high content of oxygen(14.6％)and nitrogen(4.7％)doping,as well as edge defects,which provide abundant active sites for TC adsorption.Additionally,its large specific surface area,excellent conductivity,and chemical stability ensure a stable double layer adsorption interface.Consequently,when FCPI was fabricated into electrode sheets for capacitive deionization(CDI)devices,it displayed an impressive electro-adsorption capacity for TC,reaching 989.5 mg·g-1,which is 2.3 times higher than that achieved through traditional self-adsorption(430.2 mg·g-1).After undergoing 200 cycles of adsorption-desorption in natural water,FCPI retained over 70％of its adsorption capacity,showcasing exceptional regeneration and cycling stability.Furthermore,FCPI exhibited high-efficiency TC adsorption and simultaneous removal of hardness ions in various water environments,underscoring its significant practical implications for the effective treatment of complex water pollution and environmental protection.

polyimidetetracyclineporous carbonnitrogen-oxygen co-dopingcapacitive deionization technology

黄慧婷、李艳花、汤贺尧、肖宇、罗美娟、罗方

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湖南工学院材料科学与工程学院,衡阳,421002

湖南顺隆新能源科技有限公司,衡阳,421002

聚酰亚胺 四环素 多孔碳 氮氧共掺杂 电容去离子技术

湖南省自然科学基金湖南省教育厅优秀青年项目湖南省科技创新项目大学生创新训练和创业实践项目大学生创新训练和创业实践项目

2022JJ4014022B08642021RC1008S202311528033S202311528070S

2024

10.7524/j.issn.0254-6108.2023080707

环境化学
中国科学院生态环境研究中心

环境化学

CSTPCD北大核心
影响因子：1.049
ISSN：0254-6108
年,卷(期)：2024.43(3)
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