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Issue 59, 2016, Issue in Progress
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Surface properties of amphiphilic carbon nanotubes and study of their applicability as basic catalysts

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Abstract

Amphiphilic hybrid carbon nanotubes (CNTs) containing a hydrophobic undoped section connected to a hydrophilic N-doped segment were synthesized. These amphiphilic hybrid CNTs were characterized by elemental analysis, nitrogen physisorption (BET), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), CO2 adsorption coupled with microcalorimetry and X-ray photoelectron spectroscopy (XPS). The point of zero charge (PZC) for the different materials was also determined. The presence of basic sites on the surface of N-doped nanotubes is evidenced both from the CO2 adsorption measurements and the PZC determinations. Their catalytic activity in the aldol condensation of furfural derivatives and acetone was evaluated. The results of the catalytic tests show significant specific activities (amount of reactant converted per gram of solid) when compared with strong basic solutions of NaOH. A clear correlation between the characterization data and the catalytic behavior was found. Furthermore, the selectivity values towards the two main reaction products, C8 and C13 aldol condensation adducts, are close to that of the NaOH solution. All together, these findings suggest these materials might be useful basic catalysts.

Graphical abstract: Surface properties of amphiphilic carbon nanotubes and study of their applicability as basic catalysts

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Publication details

The article was received on 28 Mar 2016, accepted on 29 May 2016 and first published on 31 May 2016


Article type: Paper
DOI: 10.1039/C6RA08032D
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Citation: RSC Adv., 2016,6, 54293-54298

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    Surface properties of amphiphilic carbon nanotubes and study of their applicability as basic catalysts

    C. Ramirez-Barria, A. Guerrero-Ruiz, E. Castillejos-López, I. Rodríguez-Ramos, J. Durand, J. Volkman and P. Serp, RSC Adv., 2016, 6, 54293
    DOI: 10.1039/C6RA08032D

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