Control of Diameter Distribution of Single-walled Carbon Nanotubes by Novel MgO-Supported Co-Y Bimetallic Catalyst
In the area of carbon tube growth and application,the tube diameter control of single-walled carbon nanostructures is a significant topic.In this study,a novel cobalt-yttrium(Co-Y)bimetallic catalyst was prepared for the first time by co-impregnation method using magnesium oxide(MgO)as a carrier.The high-melting-point Y was used as the diluent and anchoring component to control the size of the active component Co nanoparticles.The structure and morphology of the catalyst were character-ized by SEM,XRD,XPS and TEM,and the existence states of Y and Co were determined to be Y2O3 and Co3O4,respectively,and the addition of Y metal can significantly improve the dispersion of Co3O4 grains.The diameter distribution of the product was analyzed by TEM and Raman,and the results showed that the Co-Y/MgO catalyst system prepared single-walled carbon nanometers with a narrow di-ameter distribution,and the diameter ranged from 1.06 nm to 1.42 nm.
Co-Y/MgOsingle-walled carbon nanotubediameter distributioncatalytic chemical va-por depositionimpregnation method
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维普
