期刊
BIORESOURCE TECHNOLOGY
卷 116, 期 -, 页码 453-458出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.03.118
关键词
Microbially-reduced graphene; Extracellular electron transfer; Scaffolds; Microbial fuel cell
资金
- National Nature Science Foundation of China [41101211, 41171205, 21177030]
- Nature Science Foundation of Guangdong Province, China [104510 65003005012]
- Guangdong Natural Science Foundation [S2011030002882]
A one-pot method is exploited by adding graphene oxide (GO) and acetate into an microbial fuel cell (MFC) in which GO is microbially reduced, leading to in situ construction of a bacteria/graphene network in the anode. The obtained microbially reduced graphene (MRG) exhibits comparable conductivity and physical characteristics to the chemically reduced graphene. Electrochemical measurements reveal that the number of exoelectrogens involved in extracellular electron transfer (EET) to the solid electrode, increases due to the presence of graphene scaffolds, and the EET is facilitated in terms of electron transfer kinetics. As a result, the maximum power density of the MFC is enhanced by 32% (from 1440 to 1905 mW m(-2)) and the coulombic efficiency is improved by 80% (from 30 to 54%). The results demonstrate that the construction of the bacteria/graphene network is an effective alternative to improve the MFC performance. (C) 2012 Elsevier Ltd. All rights reserved.
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