Green preparation of reduced graphene oxide using a natural reducing agent
| Autor: | Sharifah Bee Abdul Hamid, Soon Weng Chong, Chin Wei Lai |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Reducing agent Graphene Process Chemistry and Technology Hydrazine Inorganic chemistry Oxide Sulfuric acid Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Potassium permanganate chemistry.chemical_compound Electrical resistance and conductance Chemical engineering chemistry law Materials Chemistry Ceramics and Composites Graphite |
| Zdroj: | Ceramics International. 41:9505-9513 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2015.04.008 |
| Popis: | A simple and efficient method was introduced for the high-conversion preparation of graphene oxide (GO) from large graphite flakes (average flake size=100 μm) using a simplified Hummer׳s method. Natural reducing agents such as lemon juice and vinegar were compared with hydrazine (N 2 H 4 ) as potential reducing agents. Graphene was prepared by chemical reduction of GO because this method was low cost and could be used for large-scale graphene production. This one-pot graphene preparation was performed at room temperature. Different degrees of oxidation of graphite flakes were obtained by stirring graphite in a mixture of sulfuric acid and potassium permanganate at different oxidation times, and highly exfoliated GO sheets were produced. GO was subsequently reduced effectively by lemon juice, a new, green, and potential reducing agent with pH 2.3. This reduced GO exhibited a high electrical conductance of 24.6 μS attributed to its higher C/O ratio (≈8:2) compared with other samples. |
| Databáze: | OpenAIRE |
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