High pressure study of nitrogen doped carbon nanotubes using Raman spectroscopy and synchrotron X-ray diffraction

Weiguang Shi; Hao Liu; Zhaohui Dong; Zhongying Mi; Sean R. Shieh; Xueliang Sun; Xiaoyang Liu

Arabian Journal of Chemistry (Jan 2020)

High pressure study of nitrogen doped carbon nanotubes using Raman spectroscopy and synchrotron X-ray diffraction

Weiguang Shi,
Hao Liu,
Zhaohui Dong,
Zhongying Mi,
Sean R. Shieh,
Xueliang Sun,
Xiaoyang Liu

Affiliations

Weiguang Shi: College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China; Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada
Hao Liu: Chengdu Green Energy and Green Manufaturing Technology R&D Center, Chengdu 610207 China; Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B7, Canada
Zhaohui Dong: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China; Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada; Corresponding authors at: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China (Z. Dong), Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada.
Zhongying Mi: Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada
Sean R. Shieh: Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada; Corresponding authors at: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China (Z. Dong), Department of Earth Sciences, University of Western Ontario, London, Ontario N6A 5B7, Canada.
Xueliang Sun: Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B7, Canada
Xiaoyang Liu: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130023, China

Journal volume & issue: Vol. 13, no. 1
pp. 3008 – 3016

Abstract

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In this study, nitrogen-doped carbon nanotubes (CNx-NTs) with a 8.4% nitrogen content were investigated under high pressure using Raman spectroscopy as well as X ray diffraction (XRD) with synchrotron radiation. For comparison purpose, high pressure behaviors of carbon nanotubes (CNTs) without nitrogen were studied as well. Two phase transformations were identified in CNx-NTs, which can be assigned to tube shape change from circular to ellipse-like and then to flatten shape. In strong contrast, no obvious phase transition was found in CNTs. In addition to the tube shape change, a high pressure M-carbon phase was also evidenced by XRD. Both CNTs and CNx-NTs showed axial dependent compressibility under high pressure. Furthermore, this study found the CNx-NTs acted more complexly than carbon in other forms such as single wall CNTs, multiwall CNTs, and graphite, suggesting the doping of nitrogen in addition to the wall thickness affect the properties of CNx-NTs under high pressure. Especially the doping of nitrogen could also help to extend the appearance of M-carbon phase to lower pressure range. Finally, the TEM images also show the retrieved CNx-NTs were partially amorphousized, which was believed due to the high pressure M-carbon phase formed at high pressure. Keywords: Nitrogen doped carbon nanotube, High pressure behaviours, Synchrotron radiation, Raman spectroscopy, Phase transformation, M-carbon phase

Published in Arabian Journal of Chemistry

ISSN: 1878-5352 (Print)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: http://www.journals.elsevier.com/arabian-journal-of-chemistry/

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