期刊
ACS NANO
卷 3, 期 12, 页码 4098-4104出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn9009278
关键词
graphene; carbon nanofibers; carbon nanotubes; carbothermal reduction; nonmetal catalysis; SiC
类别
资金
- European Network CARBIO [MRTN-CT-2006-035616]
- Cusanuswerk
- EU
The use of SiO2 as a catalyst for graphitic nanostructures, such as carbon nanotubes and graphene, is a new and rapidly developing catalyst system. A key question is whether carbide phases form in the reaction. We show the formation of SiC from SiO2 nanoparticles for the synthesis of graphitic carbon nanostructures via chemical vapor deposition (CVD) at 900 degrees C. Our findings point to the carbothermal reduction of SiO2 in the CVD reaction. The inclusion of triethyl borate apparently accelerates the process and leads to improved yields. The study helps better understand the growth mechanisms at play in carbon nanotube and carbon nanofiber formation when using SiO2 catalysts.
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