CO2-Assisted SWNT Growth on Porous Catalysts

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• 作者：Qian Wen ; Weizhong Qian ; Fei Wei ; Yi Liu ; Guoqing Ning ; Qiang Zhang
• 刊名：Chemistry of Materials
• 出版年：2007
• 出版时间：March 20, 2007
• 年：2007
• 卷：19
• 期：6
• 页码：1226 - 1230
• 全文大小：208K
• 年卷期：v.19,no.6(March 20, 2007)
• ISSN：1520-5002

文摘

The effect of CO₂ on the synthesis of single-walled carbon nanotubes (SWNTs) by methanedecomposition on a Fe/Mo/MgO porous catalyst was investigated. Characterizations of the change inmethane conversion with time, XRD and SSA of the catalyst, Raman spectroscopy, TGA, and the specificsurface area (SSA) of SWNTs showed that CO₂ inhibited the formation of amorphous carbon around thecatalyst and also interacted with the MgO support of the catalyst, which decreased its particle size andincreased the SSA of the catalyst. The result was an increase in the yield, purity, and SSA of SWNTs.These results indicated that the limited and small space in the pores of the porous catalyst made it difficultto increase the SWNTs in high yield. The addition of CO₂, by destroying the structure of the catalyst anddecreasing the catalyst size, provides a new route to increase the yield, purity, and SSA of SWNTs.