Flame oxidation of stainless steel felt enhances anodic biofilm formation and current output in bioelectrochemical systems

Guo, Kun, Donose, Bogdan C., Soeriyadi, Alexander H., Prévoteau, Antonin, Patil, Sunil A., Freguia, Stefano, Gooding, J. Justin and Rabaey, Korneel (2014) Flame oxidation of stainless steel felt enhances anodic biofilm formation and current output in bioelectrochemical systems. Environmental Science and Technology, Just Accepted 12: 1-23. doi:10.1021/es500720g

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Author Guo, Kun
Donose, Bogdan C.
Soeriyadi, Alexander H.
Prévoteau, Antonin
Patil, Sunil A.
Freguia, Stefano
Gooding, J. Justin
Rabaey, Korneel
Title Flame oxidation of stainless steel felt enhances anodic biofilm formation and current output in bioelectrochemical systems
Journal name Environmental Science and Technology   Check publisher's open access policy
ISSN 0013-936X
1520-5851
Publication date 2014-05-27
Sub-type Article (original research)
DOI 10.1021/es500720g
Open Access Status
Volume Just Accepted
Issue 12
Start page 1
End page 23
Total pages 23
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2015
Language eng
Formatted abstract
Stainless steel (SS) can be an attractive material to create large electrodes for microbial bioelectrochemical systems (BESs), due to its low cost and high conductivity. However, poor biocompatibility limits its successful application today. Here we report a simple and effective method to make SS electrodes biocompatible by means of flame oxidation. Physicochemical characterization of electrode surface indicated that iron oxide nanoparticles (IONPs) were generated in situ on SS felt surface by flame oxidation. IONPs-coating dramatically enhanced the biocompatibility of SS felt and consequently resulted in a robust electroactive biofilm formation at its surface in BESs. The maximum current densities reached at IONPs-coated SS felt electrodes were 16.5 times and 4.8 times higher than the untreated SS felts and carbon felts, respectively. Furthermore, the maximum current density achieved with the IONPs-coated SS felt (1.92 mA/cm2, 27.42 mA/cm3) is one of the highest current densities reported thus far. These results demonstrate for the first time that flame oxidized SS felts could be a good alternative to carbon-based electrodes for achieving high current densities in BESs. Most importantly, high conductivity, excellent mechanical strength, strong chemical stability, large specific surface area, and comparatively low cost of flame oxidized SS felts offer exciting opportunities for scaling-up of the anodes for BESs.
Keyword Stainless steel felt
Surface modification
Flame oxidation
Iron oxide nanoparticles
Biocompatibility
Bioelectrochemical systems
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Publication Date (Web): May 27, 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Advanced Water Management Centre Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 01 Jun 2014, 19:28:57 EST by Dr Bogdan Donose on behalf of Advanced Water Management Centre