2013 Fiscal Year Final Research Report
Magnetic separation of minor metal by using nanographene magnetic fluid
| Project/Area Number |
24656548
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Recycling engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
HONMA Itaru 東北大学, 多元物質科学研究所, 教授 (90181560)
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| Co-Investigator(Kenkyū-buntansha) |
TOMAI Takaaki 東北大学, 多元物質科学研究所, 助教 (80583351)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | ナノグラフェン / 超臨界流体 / ジグザグエッジ |
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| Research Abstract |
Zigzag-edge nanographene can be a promising magnetic material, which contributes to the magnetic separation and collection of minor metals. In this study, we developed a novel scalable production method of zigzag-edge-introduced nanographene by combination between anisotropic etching and supercritical fluid exfoliation.
We conducted anisotropic etching of graphite substrate/powder with catalytic nanoparticles in supercritical water. Anisotropic etching made a lot of trenches consisted of zigzag edges on graphite surface. Because of the exfoliation effect of supercritical fluid, graphene was isolated from the graphite simultaneously with the anisotropic etching. Finally, the multilayer graphene with zigzag edge was exfoliated from the anisotropically etched graphite surface.
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