Journal
BIORESOURCE TECHNOLOGY
Volume 132, Issue -, Pages 121-126Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.12.180
Keywords
Microbial bioelectrochemical systems; Microbial fuel cell; Electrospun carbon nanofibers; Carbonaceous blend; Anodic bioelectrocatalysis
Funding
- Research Executive Agency (REA) of the European Union [PITN-GA-2010 264772]
- Swedish Research Council (VR) [2010-5031]
- Nanometer consortium at Lund University (nmc@LU)
- Sasol
- African Network of Analytical Chemists (SEANAC)
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The electrospun carbon nanofibers obtained from polyacrylonitrile (PAN) and PAN blends with either activated carbon (PAN-AC) or graphite (PAN-GR) were tested as anodes using Shewanella oneidensis MR-1. Extensive physico-chemical and electrochemical characterization confirmed their formation, their fibrous and porous nature, and their suitability as electrodes. N-2 adsorption measurements revealed high specific surface area (229.8, 415.8 and 485.2 m(2) g(-1)) and porosity (0.142, 0.202 and 0.239 cm(3)g(-1)) for PAN, PAN-AC and PAN-GR, respectively. The chronoamperometric measurements showed a considerable decrease in start-up time and more than a 10-fold increase in the generation of current with these electrodes (115, 139 and 155 mu A cm(-2) for PAN, PAN-AC and PAN-GR, respectively) compared to the graphite electrode (11.51 mu A cm(-2)). These results indicate that the bioelectrocatalysis benefits from the blending of PAN with activated or graphitized carbonaceous materials, presumably due to the increased specific surface area, total pore volume and modification of the carbon microstructure. (C) 2013 Elsevier Ltd. All rights reserved.
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