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Carbon dots-fed Shewanella oneidensis MR-1 for bioelectricity enhancement
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Journal Article
Carbon dots-fed Shewanella oneidensis MR-1 for bioelectricity enhancement
2020
Overview
Bioelectricity generation, by
Shewanella oneidensis
(
S. oneidensis
) MR-1, has become particularly alluring, thanks to its extraordinary prospects for energy production, pollution treatment, and biosynthesis. Attempts to improve its technological output by modification of
S. oneidensis
MR-1 remains complicated, expensive and inefficient. Herein, we report on the augmentation of
S. oneidensis
MR-1 with carbon dots (CDs). The CDs-fed cells show accelerated extracellular electron transfer and metabolic rate, with increased intracellular charge, higher adenosine triphosphate level, quicker substrate consumption and more abundant extracellular secretion. Meanwhile, the CDs promote cellular adhesion, electronegativity, and biofilm formation. In bioelectrical systems the CDs-fed cells increase the maximum current value, 7.34 fold, and power output, 6.46 fold. The enhancement efficacy is found to be strongly dependent on the surface charge of the CDs. This work demonstrates a simple, cost-effective and efficient route to improve bioelectricity generation of
S. oneidensis
MR-1, holding promise in all relevant technologies.
Bacterial fuel cells have generated attention with the prospect of green energy production; current research is focused on optimising the system to improve efficiency. Here, the authors report on the feeding of carbon dots to S. oneidensis MR-1 to enhance metabolic activity and bioelectric generation.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
