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Issue 1, 2015
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Mesoporous carbon nitride grafted with n-bromobutane: a high-performance heterogeneous catalyst for the solvent-free cycloaddition of CO2 to propylene carbonate

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Abstract

A new type of mesoporous-C4N4-based catalyst (n-butBr/mp-C3N4) was prepared by simple grafting of n-bromobutane. The N2 adsorption–desorption and X-ray diffraction characterizations indicate that, in comparison with the parent mp-C3N4, the textual and structural properties have been well retained by n-butBr/mp-C3N4. In the cycloaddition of CO2 with propylene epoxide, the n-butBr/mp-C3N4 exhibits high catalytic conversion as well as a high selectivity to propylene carbonate. The maximum TOF value obtained over n-butBr/mp-C3N4 is 10.7 h−1 at 6 h under 140 °C, which compares favorably to other reported C3N4-based catalysts. In addition to n-bromobutane, mp-C3N4 materials grafted with other alkyl halides also provide high catalytic activities. According to the Fourier transform infrared and X-ray photoelectron spectroscopy measurements, it is speculated that the catalytic active sites of n-butBr/mp-C3N4 are uncondensed amines and Br anions which originate from the reaction between n-bromobutane and the N-containing heterocycles of mp-C3N4.

Graphical abstract: Mesoporous carbon nitride grafted with n-bromobutane: a high-performance heterogeneous catalyst for the solvent-free cycloaddition of CO2 to propylene carbonate

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Publication details

The article was received on 12 Jun 2014, accepted on 28 Aug 2014 and first published on 29 Aug 2014


Article type: Paper
DOI: 10.1039/C4CY00770K
Catal. Sci. Technol., 2015,5, 447-454

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    Mesoporous carbon nitride grafted with n-bromobutane: a high-performance heterogeneous catalyst for the solvent-free cycloaddition of CO2 to propylene carbonate

    J. Xu, F. Wu, Q. Jiang and Y. Li, Catal. Sci. Technol., 2015, 5, 447
    DOI: 10.1039/C4CY00770K

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