TY - JOUR
T1 - Controlled regulation of the transformation of carbon nanomaterials under H2 mixture atmosphere by arc plasma
AU - Zhang, Da
AU - Xie, Zhipeng
AU - Zhang, Kaiwen
AU - Wang, Haoyu
AU - Qu, Tao
AU - Ma, Wenhui
AU - Yang, Bin
AU - Dai, Yongnian
AU - Liang, Feng
AU - Lei, Yong
AU - Watanabe, Takayuki
N1 - Funding Information:
This work is financially supported by the National Natural Science Foundation of China (11765010), the National Key Research and Development Program of China (No. 2019YFC1907900), the Applied Basic Research Programs of Yunnan Provincial Science and Technology Department (202001AW070004), the Freely Exploring Fund for Academicians in Yunnan Province (2018HA006), the Key Laboratory of Resource Chemistry, Ministry of Education (KLRC_ME2001),
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/9/21
Y1 - 2021/9/21
N2 - Hydrogen plays a pivotal role in carbon nanomaterials synthesis by arc plasma. However, the effect of hydrogen on morphological regulation of carbon nanomaterials has received little attention. In this paper, carbon nanomaterials synthesized under mixed H2/Ar, H2/N2, and Ar/N2 atmospheres with different ratios were investigated in detail to tackle the issue. Graphene, carbon nanocages, polyhedral graphite particles, amorphous carbon nanoballs, and carbon nanohorns underwent structural transformation as hydrogen content reduced. As a result of varying hydrogen concentration, the number of C-H bond sites at the edge of graphene islands differed, leading to the structural transformation of carbon nanomaterials originating from the formation of various types of precursors. Meanwhile, X-ray photoelectron spectroscopy results revealed that hydrogen impeded nitrogen doping because it tended to bond with electronegative nitrogen. Moreover, morphology control capability followed the order of H2 > N2 > Ar during the preparation of carbon nanomaterials through arc plasma under a mixed atmosphere.
AB - Hydrogen plays a pivotal role in carbon nanomaterials synthesis by arc plasma. However, the effect of hydrogen on morphological regulation of carbon nanomaterials has received little attention. In this paper, carbon nanomaterials synthesized under mixed H2/Ar, H2/N2, and Ar/N2 atmospheres with different ratios were investigated in detail to tackle the issue. Graphene, carbon nanocages, polyhedral graphite particles, amorphous carbon nanoballs, and carbon nanohorns underwent structural transformation as hydrogen content reduced. As a result of varying hydrogen concentration, the number of C-H bond sites at the edge of graphene islands differed, leading to the structural transformation of carbon nanomaterials originating from the formation of various types of precursors. Meanwhile, X-ray photoelectron spectroscopy results revealed that hydrogen impeded nitrogen doping because it tended to bond with electronegative nitrogen. Moreover, morphology control capability followed the order of H2 > N2 > Ar during the preparation of carbon nanomaterials through arc plasma under a mixed atmosphere.
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U2 - 10.1016/j.ces.2021.116695
DO - 10.1016/j.ces.2021.116695
M3 - Article
AN - SCOPUS:85105305568
VL - 241
JO - Chemical Engineering Science
JF - Chemical Engineering Science
SN - 0009-2509
M1 - 116695
ER -