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Preparation of Nitrogen-Doped Graphene Sheets by a Combined Chemical and Hydrothermal Reduction of Graphene Oxide
Abstract
Nitrogen-doped graphene sheets were prepared through a hydrothermal reduction of colloidal dispersions of graphite oxide in the presence of hydrazine and ammonia at pH of 10. The effect of hydrothermal temperature on the structure, morphology, and surface chemistry of as-prepared graphene sheets were investigated though XRD, N(2) adsorption, solid-state (13)C NMR, SEM, TEM, and XPS characterizations. Oxygen reduction and nitrogen doping were achieved simultaneously under the hydrothermal reaction. Up to 5% nitrogen-doped graphene sheets with slightly wrinkled and folded feature were obtained at the relative low hydrothermal temperature. With the increase of hydrothermal temperature, the nitrogen content decreased slightly and more pyridinic N incorporated into the graphene network. Meanwhile, a jellyfish-like graphene structure was formed by self-organization of graphene sheets at the hydrothermal temperature of 160 °C. Further increase of the temperature to 200 °C, graphene sheets could self-aggregate into agglomerate particles but still contained doping level of 4 wt % N. The unique hydrothermal environment should play an important role in the nitrogen doping and the jellyfish-like graphene formation. This simple hydrothermal method could provide the synthesis of nitrogen-doped graphene sheets in large scale for various practical applications.
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Cited by
Wang, H., Maiyalagan, T., & Wang, X. (2012) · ACS Catalysis · doi:10.1021/cs200652y · Cited by 3,618
Metal-Free Catalysts for Oxygen Reduction Reaction
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Nitrogen-doped carbon materials
Inagaki, M., Toyoda, M., Soneda, Y., & Morishita, T. (2018) · Carbon · doi:10.1016/j.carbon.2018.02.024 · Cited by 867
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Metadata
- Authors
- Long, D., Li, W., Ling, L., Miyawaki, J., Mochida, I., & Yoon, S.-H.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-09-23
- Volume
- 26
- Issue
- 20
- Pages
- 16096-16102
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W1971745686
- Cited by
- 729
- References
- 4
- FWCI
- 18.22
- Type
- journal article
- Language
- en
- Open access
- closed
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