Microwave assisted synthesis of rGO/ZnO composites for non-enzymatic glucose sensing and supercapacitor applications |
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| Affiliation: | 1. Materials Research Laboratory, Department of Physics, National Institute of Technology, Surathkal 575025, Karnataka, India;2. SPCTS, European Ceramic Centre, 12 Rue Atlantis, 87068 LIMOGES Cedex, France;1. Nanophysics Research Laboratory, Department of Physics, University of Tehran, North Kargar, Tehran, Iran;2. ECE Department, University of Tarbiat Modares, Tehran, Iran;1. Integrated Polymer and Systems Engineering Laboratory, School of Chemical & Biomolecular Engineering, The University of Sydney, NSW 2006, Australia;2. Laboratory of Sustainable Technology, School of Chemical & Biomolecular Engineering, University of Sydney, NSW 2006, Australia;1. Department of Materials Science and Engineering, School of Engineering, Shiraz University, Zand Boulevard, Shiraz, 7134851154, Iran;2. Department of Chemistry, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, 151-747, Republic of Korea;3. Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science & Technology, Daegu, 711-873, Republic of Korea;1. School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box 14395-553, Tehran, Iran;2. Center of Excellence for High Performance Materials, University of Tehran, Tehran, Iran;1. Research Institute of Advanced Energy Technology, Kyungpook National University, Daegu, South Korea;2. Department of Nanoscience and Nanotechnology, Kyungpook National University, Daegu, South Korea;3. Department of Chemistry Education, Kyungpook National University, Daegu, South Korea |
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| Abstract: | Zinc oxide (ZnO) and Graphene Oxide (GO) are known to show good electrochemical properties. In this paper, rGO/ZnO nanocomposites have been synthesised using a simple microwave assisted method. The nanocomposites are characterized using XRD, Raman, SEM and TEM. XRD reveals the wurtzite structure of ZnO and TEM shows the heterogeneous nucleation of ZnO nanocrystals anchored onto graphene sheets. The electrochemical properties of the rGO/ZnO nanocomposite enhanced significantly for applications in glucose sensors and supercapacitors. The non-enzymatic glucose sensor of this nanocomposite tested using cyclic voltammetry (CV) and chronoamperometry, exhibits high sensitivity (39.78 mA cm?2 mM?1) and a lower detection limit of 0.2 nM. The supercapacitor electrode of rGO/ZnO nanocomposite exhibits a significant increase in specific capacitance. |
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| Keywords: | Zinc oxide Graphene oxide Nanocomposite Supercapacitor Sensors |
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