Синтез наноблоків терморозширеного графіту з гідрофільною поверхнею
A method of hydrophilization of expanded graphite (EG) by liquid-phase treatment in the mixture of sulphuric and nitric acids is presented. As a result, EG acquires the ability of a complete wetting with water and can be suspend in water. The changes of surface chemistry of EG resulting from such tr...
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| Date: | 2012 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2012
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| Online Access: | https://surfacezbir.com.ua/index.php/surface/article/view/493 |
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| Journal Title: | Surface |
| Download file: |  |
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Surface| Summary: | A method of hydrophilization of expanded graphite (EG) by liquid-phase treatment in the mixture of sulphuric and nitric acids is presented. As a result, EG acquires the ability of a complete wetting with water and can be suspend in water. The changes of surface chemistry of EG resulting from such treatment was confirmed by IR spectroscopy. The Boehm titration enabled to estimate quantitatively the composition of main types of oxygen-containing surface functional groups whose overall concentration reached 9.1 mmol/g. Hydrophilization leads to a considerable decrease of the thickness of the EG nanoblocks and is accompanied by corresponding decrease of the number of graphene layers from 102 to 15. |
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