کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
701804 | 1460771 | 2015 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Microstructural study of FeMo/MgO catalysts prepared by sol–gel and co–impregnation and their relationship with the growth of carbon nanotubes Microstructural study of FeMo/MgO catalysts prepared by sol–gel and co–impregnation and their relationship with the growth of carbon nanotubes](/preview/png/701804.png)
• Effect of the catalyst morphology was investigated.
• FeMo/MgO catalyst (sol–gel) generates higher amount of carbon nanotubes.
• A sponge-like structure of the catalyst increases the yield of carbon nanotubes.
Multiwall carbon nanotubes (MWCNTs) were synthesized using p-xylene and FeMo/MgO catalysts prepared by two methods (co-impregnation and sol–gel). Carbon nanotubes with uniform diameters were obtained by catalytic chemical vapor deposition at 900 °C using FeMo/MgO catalyst prepared by sol–gel method. The sol–gel method resulted in a higher yield than the co-impregnation method; this was attributed to the better dispersion of the metallic nanoparticles due to the sponge-like structure. Additionally, MWCNTs with lower metals content were obtained after three steps of purification.
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Journal: Diamond and Related Materials - Volume 60, November 2015, Pages 35–41