Novel Conductive Polymer Composite PEDOT:PSS/Bovine Serum Albumin for Microbial Bioelectrochemical Devices

A novel conductive composite based on PEDOT:PSS, BSA, and Nafion for effective immobilization of acetic acid bacteria on graphite electrodes as part of biosensors and microbial fuel cells has been proposed. It is shown that individual components in the composite do not have a significant negative ef...

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Bibliographic Details
Published in:	Sensors (Basel, Switzerland) Vol. 24; no. 3; p. 905
Main Authors:	Tarasov, Sergei E, Plekhanova, Yulia V, Bykov, Aleksandr G, Kadison, Konstantin V, Medvedeva, Anastasia S, Reshetilov, Anatoly N, Arlyapov, Vyacheslav A
Format:	Journal Article
Language:	English
Published:	Switzerland MDPI AG 01-01-2024
Subjects:	Albumin Analysis Bacteria Biocatalysts Biodiesel fuels Biofuels Biosensors bovine serum albumin Carbon Carbon - chemistry Chloride conductive composite Detectors Dextrose Electrodes Electrons Enzymes Food waste Fuel cells Glucose Glucose - chemistry Graphite Medical equipment microbial biosensor microbial fuel cell Microorganisms Nafion Nanomaterials PEDOT:PSS Physiological apparatus Physiological aspects Polymers Polymers - chemistry Potassium Serum Albumin, Bovine Sodium Russia United States > US Gluconobacter oxydans microbial biosensor Nafion conductive composite microbial fuel cell bovine serum albumin PEDOT:PSS thermally expanded graphite
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Summary:	A novel conductive composite based on PEDOT:PSS, BSA, and Nafion for effective immobilization of acetic acid bacteria on graphite electrodes as part of biosensors and microbial fuel cells has been proposed. It is shown that individual components in the composite do not have a significant negative effect on the catalytic activity of microorganisms during prolonged contact. The values of heterogeneous electron transport constants in the presence of two types of water-soluble mediators were calculated. The use of the composite as part of a microbial biosensor resulted in an electrode operating for more than 140 days. Additional modification of carbon electrodes with nanomaterial allowed to increase the sensitivity to glucose from 1.48 to 2.81 μA × mM × cm without affecting the affinity of bacterial enzyme complexes to the substrate. Cells in the presented composite, as part of a microbial fuel cell based on electrodes from thermally expanded graphite, retained the ability to generate electricity for more than 120 days using glucose solution as well as vegetable extract solutions as carbon sources. The obtained data expand the understanding of the composition of possible matrices for the immobilization of bacteria and may be useful in the development of biosensors and biofuel cells.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1424-8220 1424-8220
DOI:	10.3390/s24030905