摘要
微生物燃料电池(Microbial fuel cell,MFC)传感器检测水体毒性灵敏度偏低是阻碍其实际应用的瓶颈之一。本研究利用多壁碳纳米管(MWNT)和导电炭黑(GCB)修饰石墨毡(GF),作为阳极电极启动MFC传感器。考察了碳纳米材料修饰阳极电极对MFC传感器电化学性能及水体毒性检测灵敏度的影响。结果表明,GCB和MWNT修饰的电极比未修饰的电极内阻小,MFC的功率输出由大到小的顺序为:GCB/GF-MFC(2.63 W/m^2)>MWNT/GF-MFC(2.56 W/m^2)>GF-MFC(2.09 W/m^2)。以3,5-二氯苯酚(DCP)作为模型毒物进行毒性检测实验,10 mg/L DCP对3个MFC毒性传感器的平均抑制率为:MWNT/GF-MFC(31.8%)>GCB/GF-MFC(26.3%)>GF-MFC(20.1%),碳纳米材料修饰阳极电极组装MFC的毒性检测灵敏度均有所提高,MWNT/GF-MFC灵敏度最高。本研究对MFC型传感器在水污染预警中的实际应用研究提供了参考。
The low sensitivity of microbial fuel cell （MFC）-biosensor is one of the bottlenecks in its practicalapplication. To investigate the effect of anode electrode modified with carbon nanomaterials on the sensitivity ofwater toxicity detection of MFC-based biosensor, graphite felts （ GF ） were modified using two carbonnanomaterials of multi-walled carbon nanotubes （ MWNT） and conductive carbon black （ GCB）. MFCbiosensors were started up with the anode electrodes, and the results showed that resistance of the GCB andMWNT-modified electrode was smaller than that of unmodified electrode, and the order of MFC power outputwas GCB / GF-MFC （2. 63 W/ m2）〉MWNT / GF-MFC （2. 56 W/ m2）〉GF-MFC （2. 09 W/ m2）. Then, 3, 5-dichlorophenol poison （DCP） was used as a model toxicant in toxicity test, the order of toxicity inhibitionratios of 10 mg / L DCP to three MFC biosensor was MWNT / GF-MFC （31. 8%） 〉GCB / GF-MFC （26. 3%） 〉GF-MFC （20. 1%）. The sensitivity for toxicity detection by MFC biosensors with anode electrode modifiedwith carbon nanomaterials was improved, and MWNT / GF-MFC had the highest sensitivity. The result of thestudy may promote the application of MFC biosensor in water pollution monitoring.
作者
余登斌
江岚
王沛
李婷
董绍俊
YU Deng-Bin;JIANG Lan＊;WANG Pei;LI Ting;DONG Shao-Jun(State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;Wuxi Environmental Monitoring Center,Wuxi 214121,China;The First Detachment Laboratory of Gold Force,Chinese People’s Armed Police Force,Mudanjiang 157000,China)
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2018年第7期1032-1038,共7页
Chinese Journal of Analytical Chemistry
基金
国家重大科学仪器设备开发专项(No.2013YQ170585)、国家重点研发计划项目(No.2016YFA02032030)、国家自然科学基金项目(No.21675151)和吉林省与中国科学院科技合作高技术产业化专项资金项目(No.2018SYHZ0025)资助
