PEDOT/MWCNTs复合阳极的制备及在MFC中的应用

doi:10.3969/j.issn.0438-1157.2013.05.037

化工学报 ›› 2013, Vol. 64 ›› Issue (5): 1773-1779.DOI: 10.3969/j.issn.0438-1157.2013.05.037

PEDOT/MWCNTs复合阳极的制备及在MFC中的应用

刘兴倩, 王许云, 郭庆杰

青岛科技大学化工学院, 清洁化工过程山东省高校重点实验室, 山东青岛 266042

收稿日期:2012-09-18 修回日期:2012-10-18 出版日期:2013-05-05 发布日期:2013-05-05
通讯作者: 王许云
作者简介:刘兴倩(1986-),女,硕士研究生。
基金资助:
教育部博士点专项基金项目(20103719120004);山东省杰出青年基金项目(JQ200904);山东省高等学校科研计划项目(J11LB62)。

Preparation and application of PEDOT/MWCNTs composite anode for MFC

LIU Xingqian, WANG Xuyun, GUO Qingjie

Key Laboratory of Clean Chemical Process, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China

Received:2012-09-18 Revised:2012-10-18 Online:2013-05-05 Published:2013-05-05

摘要/Abstract

摘要： 采用循环伏安法制备聚3,4-乙烯二氧噻吩/多壁碳纳米管(PEDOT/MWCNTs)导电复合物修饰石墨棒阳极,并应用于厌氧流化床微生物燃料电池(AFBMFC)中以考察其产电性能。采用场发射扫描电镜(FESEM)观察复合阳极的表面形貌及断面结构,并用循环伏安法(CV)和交流阻抗法(EIS)测试了碳纳米管加入前后修饰电极的电化学性能变化。结果表明,复合阳极在MFC中运行时,其最大输出功率密度达到217 mW·m^-2,比未加碳纳米管的PEDOT修饰电极提高30%;相应的开路电压为837.8 mV,运行3 d后污水COD去除率达到96.4%,说明在液固流化床对传质的强化作用下,复合阳极在AFBMFC中具有良好的产电性能和污水处理效果,其中碳纳米管的加入在一定程度上提高了复合阳极的导电性及改善了微生物的附着情况。

关键词: 循环伏安法, 3,4-乙烯二氧噻吩/多壁碳纳米管, 导电复合物, 微生物燃料电池, 功率密度

Abstract: A poly(3,4-ethylenedioxythiophene)/multi-walled carbon nanotubes(PEDOT/MWCNTs)composite anode was prepared and used for modification of graphite rod via cyclic voltammetry, and applied in anaerobic fluidized bed microbial fuel cell(AFBMFC)to investigate its electricity generation performance.Field emission scanning electron microscopy(FESEM)was employed to characterize the surface morphology and cross-section structure of PEDOT/MWCNTs composite anode.The electrochemical behavior of the modified anodes with or without MWCNTs was studied by means of cyclic voltammetry(CV)and electrochemical impedance spectroscopy(EIS).The results showed that the performance of the composite anode was superior and its maximum output power density up to 217 mW穖^-2, which was 30% higher than that of modified anode by PEDOT; The open circuit voltage was up to 837.8 mV.The COD removal rate reached 96.4% after MFC run 3 days.The results illustrated that the composite anode possessed good electricity generation performance and sewage treatment efficiency in the AFBMFC under the condition of mass transfer reinforcement depending on liquid-solid fluidized bed.In addition, the adding of carbon nanotubes improved the conductivity of composite anode and the state of microbial adhesion.

Key words: cyclic voltammetry, 3,4-ethylenedioxythiophene/multi-walled carbon nanotubes, conductive composites, microbial fuel cell, power density

中图分类号:

刘兴倩, 王许云, 郭庆杰. PEDOT/MWCNTs复合阳极的制备及在MFC中的应用[J]. 化工学报, 2013, 64(5): 1773-1779.

LIU Xingqian, WANG Xuyun, GUO Qingjie. Preparation and application of PEDOT/MWCNTs composite anode for MFC[J]. CIESC Journal, 2013, 64(5): 1773-1779.

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PEDOT/MWCNTs复合阳极的制备及在MFC中的应用

Preparation and application of PEDOT/MWCNTs composite anode for MFC

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