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Title: Extracellular electron uptake from carbon-based π electron surface-donors: Oxidation of graphite sheets by: Sulfobacillus thermosulfidooxidans probed by Raman and FTIR spectroscopies
Authors: Tselios, Charalampos 
Papageorgiou, Marios 
Varotsis, Constantinos 
Keywords: Electron transitions;Fourier transform infrared spectroscopy;Graphene oxide;Graphite
Category: Chemical Sciences
Field: Natural Sciences
Issue Date: 12-Jun-2019
Source: RSC Advances, 2019, Volume 9, Issue 33, Pages 19121-19125
Journal: RSC Advances 
Abstract: In this work we report Raman and FTIR evidence for extracellular electron uptake by Sulfobacillus thermosulfidooxidans from the solid phase carbon-based π-electron donor surface of graphite sheets. The primary step in the reaction is the intercalation of water on the surface of graphite followed by the formation of EPS and proceeds to form graphite oxide (GO) with a Raman ID/IG = 0.3 ratio which represents the highest defect content in the carbon lattice reported by bio-oxidation process. We propose and discuss a direct extracellular electron transfer mechanism via outer membrane redox proteins for the electron transfer.
ISSN: 2046-2069
DOI: 10.1039/c9ra03628h
Rights: © 2019 The Royal Society of Chemistry.
Type: Article
Appears in Collections:Άρθρα/Articles

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