Journal
SCIENTIFIC REPORTS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-017-12417-0
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Funding
- Thailand Research Fund (TRF)
- Synchrotron Light Research Institute (SLRI) [RSA5980073]
- Research Strengthening Project of the Faculty of Engineering, King Mongkut's University of Technology Thonburi
- National Research Council of Thailand (NRCT)
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In this work, an enzymatic biofuel cell (EBC) based on a membraneless and mediatorless glucose enzymatic fuel cell system was constructed for operation in physiological conditions (pH 7.0 and temperature 37 degrees C). The new platform EBC made of nanocomposite, including magnetic nanoparticles (Fe3O4 NPs) and reduced graphene oxide (RGO), was used for the immobilization of glucose oxidase (GOD) as bioanode and bilirubin oxidase (BOD) as biocathode. The EBC bioelectrodes were fabricated without binder or adhesive agents for immobilized enzyme and the first EBC using superparamagnetic properties with Fe3O4 NPs has been reported. The performance of the EBC was evaluated with promising results. In EBC tests, the maximum power density of the EBC was 73.7 mu W cm(-2) and an open circuit voltage (OCV) as + 0.63 V with 5 mM of glucose concentration for the physiological condition of humans. The Fe3O4-RGO nanocomposite offers remarkable enhancement in large surface areas, is a favorable environment for enzyme immobilization, and facilitates electron transfer between enzymes and electrode surfaces. Fe3O4 and RGO have been implied as new promising composite nanomaterials for immobilizing enzymes and efficient platforms due to their superparamagnetism properties. Thus, glucose EBCs could potentially be used as self-powered biosensors or electric power sources for biomedical device applications.
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