Carbon dots-fed Shewanella oneidensis MR-1 for bioelectricity enhancement

TY - JOUR

T1 - Carbon dots-fed Shewanella oneidensis MR-1 for bioelectricity enhancement

AU - Yang, Chenhui

AU - Aslan, Hüsnü

AU - Zhang, Peng

AU - Zhu, Shoujun

AU - Xiao, Yong

AU - Chen, Lixiang

AU - Khan, Nasar

AU - Boesen, Thomas

AU - Wang, Yuanlin

AU - Liu, Yang

AU - Wang, Lei

AU - Sun, Ye

AU - Feng, Yujie

AU - Besenbacher, Flemming

AU - Zhao, Feng

AU - Yu, Miao

PY - 2020/12/1

Y1 - 2020/12/1

N2 - 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.

AB - 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.

U2 - 10.1038/s41467-020-14866-0

DO - 10.1038/s41467-020-14866-0

M3 - Journal article

C2 - 32170166

SN - 2041-1723

VL - 11

JO - Nature Communications

JF - Nature Communications

IS - 1

M1 - 1379

ER -