Effect of Anode Electrode Modified with Carbon Nanomaterials of Microbial Fuel Cell-based Sensor on Detection Sensitivity of Water Toxicity

YU Deng-Bin ^1, ,
JIANG Lan ² ,
WANG Pei ³ ,
LI Ting ¹ ,
DONG Shao-Jun ¹

1.
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
Wuxi Environmental Monitoring Center, Wuxi 214121, China;
3.
The First Detachment Laboratory of Gold Force, Chinese People's Armed Police Force, Mudanjiang 157000, China

Received Date: 25 October 2017
Revised Date: 10 May 2018

Fund Project: This work was supported by the National Major Scientific Instruments and Equipment Development Special (No. 2013YQ170585), the National Key Research and Development Program of China (No. 2016YFA02032030), the National Natural Science Foundation of China (No. 21675151), and the Cooperated High-tech Industrialization Special Fund Project of Jilin Province and Chinese Academy of Sciences (No. 2018SYHZ0025).

The low sensitivity of microbial fuel cell (MFC)-biosensor is one of the bottlenecks in its practical application. To investigate the effect of anode electrode modified with carbon nanomaterials on the sensitivity of water toxicity detection of MFC-based biosensor, graphite felts (GF) were modified using two carbon nanomaterials of multi-walled carbon nanotubes (MWNT) and conductive carbon black (GCB). MFC biosensors were started up with the anode electrodes, and the results showed that resistance of the GCB and MWNT-modified electrode was smaller than that of unmodified electrode, and the order of MFC power output was 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 inhibition ratios 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 modified with carbon nanomaterials was improved, and MWNT/GF-MFC had the highest sensitivity. The result of the study may promote the application of MFC biosensor in water pollution monitoring.

Effect of Anode Electrode Modified with Carbon Nanomaterials of Microbial Fuel Cell-based Sensor on Detection Sensitivity of Water Toxicity

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