Purification and Nitrogen Doping of Nanothin Exfoliated Graphite Through RF Thermal Plasma Treatment
A mixture of nanothin exfoliated (NTE) graphite and urea (CO(NH<sub>2</sub>)<sub>2</sub>) powder was treated with radio frequency (RF) thermal plasma to achieve in situ purification and nitrogen doping of NTE graphite using the high-temperature flame of the RF plasma. Reactiv...
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MDPI AG
2019-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/9/7/995 |
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doaj-5b71ead05bce4aad8222235564a0a36a2020-11-25T00:32:01ZengMDPI AGNanomaterials2079-49912019-07-019799510.3390/nano9070995nano9070995Purification and Nitrogen Doping of Nanothin Exfoliated Graphite Through RF Thermal Plasma TreatmentByung-Koo Son0Kyu-Hang Lee1Tae-Hee Kim2Myung-Sun Shin3Sun-Yong Choi4Guangsup Cho5Department of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, KoreaDepartment of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, KoreaInstitute for Nuclear Science and Technology, Jeju National University, Jeju 63243, KoreaDepartment of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, KoreaDivision of Plasma Convergence R&D, Cheorwon Plasma Research Institute, Cheorwon 24047, KoreaDepartment of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, KoreaA mixture of nanothin exfoliated (NTE) graphite and urea (CO(NH<sub>2</sub>)<sub>2</sub>) powder was treated with radio frequency (RF) thermal plasma to achieve in situ purification and nitrogen doping of NTE graphite using the high-temperature flame of the RF plasma. Reactive species such as NH<sub>3</sub>, NH<sub>2</sub>, and HCNO generated by the thermolysis of urea play an important role in the purification and nitrogen doping of NTE graphite. The nitrogen content of NTE graphite subjected to plasma treatment increased by 5 times compared with that of raw NTE graphite. Three types of nitrogen species, namely, quaternary N, pyridinic N, and pyrrolic N, were observed after N doping with plasma treatment. The sheet resistance of N-doped NTE graphite reduced to 12–21% compared to that of the untreated NTE graphite, with the corresponding resistivity being ~7 × 10<sup>−6</sup> Ω m.https://www.mdpi.com/2079-4991/9/7/995nitrogen-doped graphiteN dopingnanothin exfoliated graphiteRF thermal plasmapurification |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Byung-Koo Son Kyu-Hang Lee Tae-Hee Kim Myung-Sun Shin Sun-Yong Choi Guangsup Cho |
| spellingShingle |
Byung-Koo Son Kyu-Hang Lee Tae-Hee Kim Myung-Sun Shin Sun-Yong Choi Guangsup Cho Purification and Nitrogen Doping of Nanothin Exfoliated Graphite Through RF Thermal Plasma Treatment Nanomaterials nitrogen-doped graphite N doping nanothin exfoliated graphite RF thermal plasma purification |
| author_facet |
Byung-Koo Son Kyu-Hang Lee Tae-Hee Kim Myung-Sun Shin Sun-Yong Choi Guangsup Cho |
| author_sort |
Byung-Koo Son |
| title |
Purification and Nitrogen Doping of Nanothin Exfoliated Graphite Through RF Thermal Plasma Treatment |
| title_short |
Purification and Nitrogen Doping of Nanothin Exfoliated Graphite Through RF Thermal Plasma Treatment |
| title_full |
Purification and Nitrogen Doping of Nanothin Exfoliated Graphite Through RF Thermal Plasma Treatment |
| title_fullStr |
Purification and Nitrogen Doping of Nanothin Exfoliated Graphite Through RF Thermal Plasma Treatment |
| title_full_unstemmed |
Purification and Nitrogen Doping of Nanothin Exfoliated Graphite Through RF Thermal Plasma Treatment |
| title_sort |
purification and nitrogen doping of nanothin exfoliated graphite through rf thermal plasma treatment |
| publisher |
MDPI AG |
| series |
Nanomaterials |
| issn |
2079-4991 |
| publishDate |
2019-07-01 |
| description |
A mixture of nanothin exfoliated (NTE) graphite and urea (CO(NH<sub>2</sub>)<sub>2</sub>) powder was treated with radio frequency (RF) thermal plasma to achieve in situ purification and nitrogen doping of NTE graphite using the high-temperature flame of the RF plasma. Reactive species such as NH<sub>3</sub>, NH<sub>2</sub>, and HCNO generated by the thermolysis of urea play an important role in the purification and nitrogen doping of NTE graphite. The nitrogen content of NTE graphite subjected to plasma treatment increased by 5 times compared with that of raw NTE graphite. Three types of nitrogen species, namely, quaternary N, pyridinic N, and pyrrolic N, were observed after N doping with plasma treatment. The sheet resistance of N-doped NTE graphite reduced to 12–21% compared to that of the untreated NTE graphite, with the corresponding resistivity being ~7 × 10<sup>−6</sup> Ω m. |
| topic |
nitrogen-doped graphite N doping nanothin exfoliated graphite RF thermal plasma purification |
| url |
https://www.mdpi.com/2079-4991/9/7/995 |
| work_keys_str_mv |
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