微晶石墨氧化-膨胀过程中微形貌与结构变化

孙红娟; 刘波; 彭同江; 段佳琪

doi:10.3799/dqkx.2018.407

Volume 43 Issue 5

May 2018

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Sun Hongjuan, Liu Bo, Peng Tongjiang, Duan Jiaqi, 2018. Micromorphology and Structure Changes of Microcrystalline Graphite during Process of Oxidation and Expansion. Earth Science, 43(5): 1481-1488. doi: 10.3799/dqkx.2018.407

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Sun Hongjuan, Liu Bo, Peng Tongjiang, Duan Jiaqi, 2018. Micromorphology and Structure Changes of Microcrystalline Graphite during Process of Oxidation and Expansion. Earth Science, 43(5): 1481-1488. doi: 10.3799/dqkx.2018.407

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Micromorphology and Structure Changes of Microcrystalline Graphite during Process of Oxidation and Expansion

doi: 10.3799/dqkx.2018.407

1.
Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
2.
Analytical and Testing Center, Southwest University of Science and Technology, Mianyang 621010, China

Received Date: 2017-10-01
Publish Date: 2018-05-15

Abstract

Abstract

In order to reveal the structure changes of microcrystalline graphite in the process of oxidation and expansion, the products were characterized by means of SEM-EDS, XRD, Raman and FTIR in this study. The results show that the interlayer distance of microcrystalline graphite oxide is enlarged and many functional groups including hydroxyl, carboxyl and epoxy groups are bonded on the graphene layer in the oxidation process. In addition, with the increase of oxidant (KMnO₄), the space distance, structural defects and disorder of oxidized product increased gradually. After being expanded with high temperature, some of the oxygen-containing functional groups in the structure were removed, and the oxidized microcrystalline graphite was reduced partly. In addition, the structural defects and disorder degrees of expanded microcrystalline graphite reduced, and local sp² regions were recovered. The expanded microcrystalline graphite particles contained abundant network pore structures with pore sizes of 2-5 nm.
- microcrystalline graphite,
- oxidation,
- expansion,
- structure,
- mineralogy

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References(34)

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Micromorphology and Structure Changes of Microcrystalline Graphite during Process of Oxidation and Expansion

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