A green, simple and cost-effective approach to synthesize high quality graphene by electrochemical exfoliation via process optimization
| Autor: | Chung Hsien Chuang, Wei-Ren Liu, Chia Hsuan Chen, Chi Wen Chu, Ching Yuan Su, Chia Hung Huang, Kuei Ting Hsu |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Scanning electron microscope Graphene General Chemical Engineering Analytical chemistry General Chemistry Electrolyte Exfoliation joint law.invention symbols.namesake X-ray photoelectron spectroscopy law symbols Fourier transform infrared spectroscopy High-resolution transmission electron microscopy Raman spectroscopy |
| Zdroj: | RSC Advances. 5:54762-54768 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c5ra07710a |
| Popis: | This research focuses on manufacturing graphene nanosheets (GNSs) using an electrochemical exfoliation method. Through tuning the synthetic parameters, such as the composition of electrolytes, concentration of the electrolyte, KOH/H2SO4 ratio, and applied voltage and current density, the relationships between the material’s characteristics and synthetic parameters were studied. The physical and chemical properties of as-synthesized GNSs were systematically studied using scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), atomic force microscopy (AFM), Raman spectroscopy (Raman), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Among the synthetic parameters, current density plays a very important role in this exfoliation process. Under the optimal current density of 0.11 A cm−2, we successfully synthesized high quality GNSs with a D/G ratio of 0.061, which is far superior to the reported values of other groups. The results indicate that a green, simple and cost-effective exfoliation process has been successfully developed in this study. |
| Databáze: | OpenAIRE |
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