11/20/2023 0 Comments Al carbonThe CDs are found to be efficiently up-taken by S. The water-soluble CDs employed in this work are synthesized by sodium naphthalene reagent and triethylamine at room temperature (Fig. Herein, we report on the application og CDs to boost the bioelectricity generation of S. However, their interaction with bacteria, especially the potential in bioelectrical systems, remains unexplored. So far, CDs have demonstrated promising performance across a large variety of technical practices, e.g., light emission, photo/electro-catalysis, sensing of heavy metal ions, and biological applications of in vivo imaging and antitumor treatment 11, 12, 13, 14, 15, 16, 17, 18. Recently, carbon dots (CDs) have become particularly attractive, due to their unique electronic and physicochemical properties, such as high electron-transfer efficiency, excellent stability, reliable biocompatibility, and distinct optical absorption and photoluminescence (PL) 10. oneidensis MR-1’s capability for bioelectricity generation based on facile and cost-effective methods would be highly desirable. However, the sophistication and high cost of these methods, as well as the relatively low enhancement, have been recognized as a bottleneck in real-life applications 9. Several successful means have been proposed, including genetic engineering to provide purposeful protein expression 6, biologically generated nanoparticles (e.g., Au, Pd) on the surface or inside the bacteria for direct electron-transfer enhancement 3, 7, and synthetically conjugated oligoelectrolytes through bacterial outer membrane intercalation for transmembrane electron-transfer enhancement 8. oneidensis MR-1 is one of the primary strategies to improve their performance for bioelectricity generation. oneidensis) MR-1 is the most representative, due to their prominent competency on electron generation as well as electron transfer from the quinone and quinol pool in the cytoplasmic membrane to extracellular electron acceptors, e.g., minerals containing Fe(III) or electrodes of fuel cells 4, 5. Among various bacteria applied for this purpose, Shewanella oneidensis ( S. oneidensis MR-1, holding promise in all relevant technologies.īioelectricity produced by electrochemically active bacteria has sparked substantial interests, showing considerable prospects for sustainable energy production, environmental pollution treatment, as well as fabrication of metal nanoparticles 1, 2, 3. This work demonstrates a simple, cost-effective and efficient route to improve bioelectricity generation of S. The enhancement efficacy is found to be strongly dependent on the surface charge of the CDs. In bioelectrical systems the CDs-fed cells increase the maximum current value, 7.34 fold, and power output, 6.46 fold. Meanwhile, the CDs promote cellular adhesion, electronegativity, and biofilm formation. ![]() 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. ![]() Herein, we report on the augmentation of S. oneidensis MR-1 remains complicated, expensive and inefficient. ![]() Attempts to improve its technological output by modification of S. oneidensis) MR-1, has become particularly alluring, thanks to its extraordinary prospects for energy production, pollution treatment, and biosynthesis. Bioelectricity generation, by Shewanella oneidensis ( S.
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