Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 1, Pages 422-426Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.06.046
Keywords
Microbial fuel cell; Anode; Surface modification; Activated carbon fiber felt; Carbon electrode modification
Funding
- National Natural Science Foundation of China [30800796]
- Fundamental Research Funds for the Central Universities [2009zz0073, 2009zz0048, 2009zm0202]
- Specialized Research Fund for the Doctoral Program of Higher Education [SRFDP 20070561082]
- Guangdong Provincial Science and Technology [2007A020100001-6]
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Surface modifications of anode materials are important for enhancing power generation of microbial fuel cell (MFC). Membrane free single-chamber air-cathode MFCs, MFC-A and MFC-N, were constructed using activated carbon fiber felt (ACF) anodes treated by nitric acid and ethylenediamine (EDA), respectively. Experimental results showed that the start-up time to achieve the maximum voltages for the MFC-A and MFC-N was shortened by 45% and 51%, respectively as compared to that for MFC-AT equipped with an unmodified anode. Moreover, the power output of MFCs with modified anodes was significantly improved. In comparison with MFC-AT which had a maximum power density of 1304 mW/m(2), the MFC-N achieved a maximum power density of 1641 mW/m(2). The nitric acid-treated anode in MFC-A increased the power density by 58% reaching 2066 mW/m(2). XPS analysis of the treated and untreated anode materials indicated that the power enhancement was attributable to the changes of surface functional groups. (C) 2010 Elsevier Ltd. All rights reserved.
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