Pressure-dependent synthesis of graphene nanoflakes using Ar/H-2/CH4 non-thermal plasma based on rotating arc discharge

doi:10.1016/j.diamond.2020.108176

	Pressure-dependent synthesis of graphene nanoflakes using Ar/H-2/CH4 non-thermal plasma based on rotating arc discharge
	Wang, Cheng 1; Lu, ZhongShan 1; Ma, Jing 1; Chen, Xianhui 1; Yang, Chengpeng 2; Xia, Weidong 1
刊名	DIAMOND AND RELATED MATERIALS
	2021
卷号	111
关键词	Graphene nanoflakes Non-thermal plasma Rotating arc discharge Pressure effect Carbonaceous radicals
ISSN号	0925-9635
DOI	10.1016/j.diamond.2020.108176
通讯作者	Xia, Weidong(xiawd@ustc.edu.cn)
英文摘要	Non-thermal plasma can be used for the continuous synthesis of graphene nanoflakes. In this paper, the influence of pressure on graphene nanoflake synthesis was studied in an Ar/H-2/CH4 non-thermal plasma based on rotating arc discharge. Graphene nanoflakes were fabricated by CH4 decomposition in a pressure range of 20-200 kPa, and their properties were analyzed multiple characterization methods. The results showed that pressure affected the product properties and yield. From 60 to 200 kPa, all products were graphene nanoflakes with sizes of 50-300 nm and 1-20 graphite layers. A relatively high pressure favored the formation of graphene nanoflakes in high yield, with good crystalline structures, low oxygen contents, and excellent thermal stability. A low pressure promoted the formation of graphene nanoflakes with fewer layers and larger specific surface areas. Also, at a lower pressure (20 kPa), small spherical particles (3-8 nm diameter), similar to carbon dots, emerged on the graphene nanoflakes. Correlations between process parameters and characterization results suggested that different concentrations of carbonaceous radicals in the plasma zone affected the product characteristics.
资助项目	National Natural Science Foundation of China[12075242] ; National Natural Science Foundation of China[11675177] ; National Natural Science Foundation of China[11705202] ; Anhui Provincial Natural Science Foundation[1808085MA12] ; Anhui Province Scientific and Technological Project[1604a0902145]
WOS关键词	FEW-LAYER GRAPHENE ; CARBON NANOMATERIALS ; HYDROGEN ; METHANE ; SPECTROSCOPY ; GRAPHITE ; GAS ; MECHANISMS ; DISORDER ; DOTS
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000612813800012
资助机构	National Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation ; Anhui Province Scientific and Technological Project
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120158]
专题	中国科学院合肥物质科学研究院
通讯作者	Xia, Weidong
作者单位	1.Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230027, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Wang, Cheng,Lu, ZhongShan,Ma, Jing,et al. Pressure-dependent synthesis of graphene nanoflakes using Ar/H-2/CH4 non-thermal plasma based on rotating arc discharge[J]. DIAMOND AND RELATED MATERIALS,2021,111.
APA	Wang, Cheng,Lu, ZhongShan,Ma, Jing,Chen, Xianhui,Yang, Chengpeng,&Xia, Weidong.(2021).Pressure-dependent synthesis of graphene nanoflakes using Ar/H-2/CH4 non-thermal plasma based on rotating arc discharge.DIAMOND AND RELATED MATERIALS,111.
MLA	Wang, Cheng,et al."Pressure-dependent synthesis of graphene nanoflakes using Ar/H-2/CH4 non-thermal plasma based on rotating arc discharge".DIAMOND AND RELATED MATERIALS 111(2021).