Synthesis of graphene oxide and reduced graphene oxide using volumetric method by a novel approach without NaNO2 or NaNO3
| Autor: | Raj Kishora Dash, Rajitha Gunda, Buchi Suresh Madireddy |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Materials Science (miscellaneous) Oxide Nanochemistry 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound symbols.namesake law Oxidizing agent Nano Graphite Partial oxidation Electrical and Electronic Engineering Physical and Theoretical Chemistry Graphene Cell Biology 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry Chemical engineering symbols 0210 nano-technology Raman spectroscopy Biotechnology |
| Zdroj: | Applied Nanoscience. 8:751-758 |
| ISSN: | 2190-5517 2190-5509 |
| Popis: | In the present work, graphite was processed to graphene oxide (GO) using modified Hummer’s method by volumetric titration approach, without attaining zero temperature and the addition of toxic chemicals (NaNO2/NaNO3). The complete oxidation of graphite to graphene oxide was obtained by controlled addition (volumetric titration) of KMnO4. The addition of higher KMnO4 resulted in partial oxidation and 2–3 mono-layers with less defects/disordered structure of reduced graphene oxide (RGO) sheets were achieved. Samples were analyzed by XRD, FT-IR, Raman analysis, and TEM analysis. X-ray diffraction displayed the oxidized peak of graphene oxide at 11.9° and reduced graphene oxide at 23.8°. The prolonged stability of the synthesized GO with lower mole ratios of oxidizing agent was confirmed from UV–visible spectroscopy. Based on the results, processed graphene oxide is found to be a candidate material for thermally stable capacitor application. |
| Databáze: | OpenAIRE |
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