Surface modification for enhanced biofilm formation and electron transport in Shewanella anodes

Atanassov, Plamen; Schuler, Andrew J.; Ista, Linnea; Artyushkova, Kateryna; Babanova, Sofia; Lopez, Ciana; Cornejo, Jose A.; Santoro, Carlo

Abstract

© The Author(s) 2015. Published by ECS. In this study a simple, fast and effective surface modification method for enhanced biofilm formation, increased electron transfer rate and higher current density generation from microbial fuel cell (MFC) has been demonstrated. This method consists of partial oxidation of carbon felt material by UV/O3 treatment. Results from the electrochemical studies performed suggest that Shewanella oneidensis MR-1 biofilm formation is favored on UV/O3 treated carbon felt electrodes when subjected to an applied potential of-0.3 V vs. Ag/AgCl. Carbon electrodes exposed to 45 min of UV/O3 treatment provided the best electrochemical results and richer bacterial cell attachment. Ozone exposure above 45 min presented decreased MFC performance and current generation. Visual confirmation via SEM images indicated a link between the current generation and the presence of biomass attached to the working electrodes. In addition, we have shown enrichment of the electrode surface with flavin, which correlates with the increased anodic performance.

• Journal Article Type: Article
• Acceptance Date: Jun 12, 2015
• Publication Date: Jun 12, 2015
• Deposit Date: Apr 25, 2018
• Journal: Journal of the Electrochemical Society
• Print ISSN: 0013-4651
• Electronic ISSN: 1945-7111
• Publisher: Electrochemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 162
• Issue: 9
• Pages: H597-H603
• DOI: https://doi.org/10.1149/2.0271509jes
• Keywords: anode modification, microbial anode; microbial fuel cell, riboflavin, Shewanella oneidensis MR-1
• Public URL: https://uwe-repository.worktribe.com/output/832775
• Publisher URL: http://dx.doi.org/10.1149/2.0271509jes
• Contract Date: Apr 25, 2018