Carbon Xerogel-supported Iron as a Catalyst in Combustion Synthesis of Carbon Fibrous Nanostructures

材料科学技术（英文）, 2012, 28(4): 294-302.

Carbon Xerogel-supported Iron as a Catalyst in Combustion Synthesis of Carbon Fibrous Nanostructures

^1, , ^2,

1.Institute of Chemistry, Military University of Technology, Kaliskiego 2, 00-908 Warsaw, Poland

2.Institute of Chemistry, Military University of Technology, Kaliskiego 2, 00-908 Warsaw, Poland

基金项目: Acknowledgements This work was supported by the internal grant of the Faculty of Advanced Technology and Chemistry, MUT (No. GW-08-977). The authors wish to acknowledge support from Prof. Stanislaw Cudzilo

关键词：催化剂系统 , 纳米结构 , 碳纤维 , 燃烧合成 , 干凝胶 , 铁掺杂 , 扫描电子显微镜分析 , 自蔓延高温合成

Carbon Xerogel-supported Iron as a Catalyst in Combustion Synthesis of Carbon Fibrous Nanostructures

Keywords： Combustion synthesis , Carbon xerogel , Carbon fibrous nanostructures , Carbonnanotubes , Scanning electron microscopy ,

The catalytically assisted self-propagating high-temperature synthesis of carbon fibrous nanostructures, where the iron-doped colloidal carbon xerogel is proposed as a catalyst system, was examined. The carbon xerogel was prepared through carbonization of an iron doped organic xerogel at temperatures ranging from 600 to 1050℃. The reaction between calcium carbide and hexachloroethane in the presence of sodium azide is exothermic enough to proceed at a high temperature, self-sustaining regime. The combustion reactions of those mixtures enriched with iron-doped carbon xerogels were conducted in a stainless steel reactor---calorimetric bomb under an initial pressure of 1 MPa of argon. Scanning electron microscopy analysis of the combustion products revealed low yield of various type of carbon fibers (presumably nanotubes), which grew via the tip-growth mechanism. The fibrous nanostructures were found in the vicinity of the spot of ignition, while in the outer and cooler area of the reactor, dusty products with soot-like morphology dominated. No significant correlation between the pyrolysis temperature of the carbon xerogel and the morphology of the obtained carbon fibrous nanostructures was observed.

参考文献

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Carbon Xerogel-supported Iron as a Catalyst in Combustion Synthesis of Carbon Fibrous Nanostructures

Carbon Xerogel-supported Iron as a Catalyst in Combustion Synthesis of Carbon Fibrous Nanostructures

参考文献