Synthesis of (B-C-N) Nanomaterials by Arc Discharge Using Heterogeneous Anodes  

作　　者：Djamel Eddine GOURARI Manitra RAZAFINIMANANA Marc MONTHIOUX Raul ARENAL Flavien VALENSI Sebastien JOULIE Virginie SERIN 

机构地区：[1]LAPLACE (Laboratoire Plasma et Conversion d'Energie), CNRS-INPT-Universite Toulouse III, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France [2]CEMES (Centre d'Elaboration des Materiaux et d'Etudes Structurales), CNRS-Universite Toulouse III, 29 rue Jeanne Marvig, F-31055 Toulouse Cedex 4, France [3]Instituto de Nanociencia de Aragon (INA), Universidad de Zaragoza Calle Mariano Esquillor 50018 Zaragoza, Spain

出　　处：《Plasma Science and Technology》2016年第5期465-468,共4页等离子体科学和技术（英文版）

摘　　要：In spite of the current prevalence of the CVD-based processes, the electric arc remains an interesting process for the synthesis of carbon nanoforms, thanks to its versatility, robustness and easiness. It also allows performing in-situ substitution of carbon atoms by hetero-elements in the graphene lattice. Our work aims to establish a correlation between the plasma properties, type and chemical composition （and the substitution rate） of the obtained single-wall carbon nan- otubes. The plasma was characterized by optical emission spectroscopy and the products were analyzed by high resolution transmission electron microscopy and core level Electron Energy-Loss Spectroscopy （EELS）. Results show that a high boron content leads to a plasma temperature decrease and hinders the formation of nanotubes. This effect can be compensated by increasing the arc current and/or yttrium content. The optimal conditions for the synthesis of boron- and/or nitrogen-substituted nanotubes correspond to a high axial plasma temperature associated to a strong radial gradient. EELS analysis confirmed that the boron incorporates into the graphenic lattice.In spite of the current prevalence of the CVD-based processes, the electric arc remains an interesting process for the synthesis of carbon nanoforms, thanks to its versatility, robustness and easiness. It also allows performing in-situ substitution of carbon atoms by hetero-elements in the graphene lattice. Our work aims to establish a correlation between the plasma properties, type and chemical composition （and the substitution rate） of the obtained single-wall carbon nan- otubes. The plasma was characterized by optical emission spectroscopy and the products were analyzed by high resolution transmission electron microscopy and core level Electron Energy-Loss Spectroscopy （EELS）. Results show that a high boron content leads to a plasma temperature decrease and hinders the formation of nanotubes. This effect can be compensated by increasing the arc current and/or yttrium content. The optimal conditions for the synthesis of boron- and/or nitrogen-substituted nanotubes correspond to a high axial plasma temperature associated to a strong radial gradient. EELS analysis confirmed that the boron incorporates into the graphenic lattice.

关 键 词：arc discharge plasma nanomaterials synthesis optical spectroscopy boronnitride doped carbon nanotubes HRTEM EELS 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O53[理学—等离子体物理]