Preparation and characterization of biocompatible carbon electrodes |
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| Authors: | J. Jayapriya Judy Gopal V. Ramamurthy U. Kamachi Mudali Baldev Raj |
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| Affiliation: | 1. Department of Chemical Engineering, A.C. Tech., Anna University, Chennai 600 025, India;2. Department of Biotechnology, PSG College of Technology, Coimbatore 641 004, India;3. Corrosion Science and Technology Division, Materials Characterization Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India;1. Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK;2. Department of Chemistry, King’s College London, Britannia House, 7 Trinity Street, London SE1 1DB, UK;3. Department of Chemistry, University of North Texas, 1155 Union Circle, Box 305070, Denton, TX 76203, USA;4. Inorganic Chemistry Research Group, Chemical Physics, Center for Chemistry and Chemical Engineering, Lund University, Box 124, SE-221 00 Lund, Sweden;1. Jiangsu Provincial Key Lab of Fine Petrochemicals, Changzhou University, Changzhou 213164, PR China;2. Science and Technology Department, Changzhou College of Information Technology, Changzhou 213164, PR China;3. Jiangnan Graphene Research Institute, Changzhou 213000, PR China;4. School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China |
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| Abstract: | Electron transfer in microbial fuel cell and biosensors could be facilitated through high conductive materials with enhanced active surface area and appropriate redox potential suited to microbial metabolism. In the first strategy based on bulk doping, graphite/epoxy composite electrode (GECE) bulk was modified with six types of metal ion which were prepared through a wet impregnation procedure. In the second strategy, immobilization of redox dye on carbon cloth and graphite sheet was carried out using N,N′-dicyclohexylcarbodiimide for surface modification. Crystallinity, morphology, surface chemistry and electrochemical properties of all modified electrodes were investigated. Influence of redox behavior of electrodes suited to microbial metabolism and conducive to biofilm formation have been examined. It was observed that the Fe3+ doped GECE surfaces exhibited significantly high biofilm formation of 1.10(±0.18) × 107 CFU/cm2 as compared to other dopants. The microbial growth on the carbon cloth electrode and carbon fiber reinforced plate were found to be less (2.6(±0.97) × 104, 4.8(±1.8) × 103 CFU/cm2 respectively) compared to GECEs. |
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