Structural analysis and capacitive properties of carbon spheres prepared by hydrothermal carbonization
| Autor: | Katsuro Hayashi, Junichi Hojo, Miki Inada, Naoya Enomoto |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Carbonization General Chemical Engineering chemistry.chemical_element Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Hydrothermal carbonization Adsorption Microcrystalline Chemical engineering chemistry Mechanics of Materials Specific surface area medicine Graphite 0210 nano-technology Carbon Activated carbon medicine.drug |
| Zdroj: | Advanced Powder Technology. 28:884-889 |
| ISSN: | 0921-8831 |
| Popis: | The structure and capacitive properties of carbon spheres synthesized by heat treatment after hydrothermal carbonization of glucose were investigated. X-ray diffraction, Raman spectroscopy, and 13 C NMR spectroscopy measurements revealed that the spheres formed by polymerization of 5-(hydroxymethyl)-2-furaldehyde derived from glucose contained a small amount of microcrystalline graphite. N 2 adsorption analysis showed that heat treatment was effective for carbonization and nanopore formation in the carbon spheres. The capacitive properties of the carbon spheres were improved by heat treatment because their specific surface area increased and internal resistance decreased. The capacitance of carbon spheres heat treated at 800 °C was 115 F/g, which was higher than that of commercial activated carbon (90 F/g). |
| Databáze: | OpenAIRE |
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