One-pot synthesized multi-functional graphene oxide as a water-tolerant and efficient metal-free heterogeneous catalyst for cycloaddition reaction

Dong Hui Lan, Lang Chen, Chak Tong AU, Shuang Feng Yin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)

Abstract

A series of functional graphene oxide (F-GO) materials were prepared by silylanization of graphene oxide (GO) with chlorine-terminal silanes and subsequent nucleophilic substitution reaction with tertiary amine in a one-pot approach. The quaternary ammonium salt was generated and immobilized simultaneously in situ, and the primary amine is beneficial to improve the number of surface functionalities on GO. This is the first time that a multi-functional GO material was designed, prepared and used for the synthesis of cyclic carbonates through the cycloaddition of carbon dioxide (CO2) to epoxides. The F-GO catalyst can be easily separated and reused for at least five times without significant loss of activity (TOF = 46.4 h-1). The excellent performance is attributed to the synergetic effect of silanol group and halide anion for ring opening of epoxide as well as the role of amine for CO2 adsorption and activation. A possible mechanism is proposed for the cycloaddition reaction over F-GO.

Original languageEnglish
Pages (from-to)22-31
Number of pages10
JournalCarbon
Volume93
DOIs
Publication statusPublished - 8 Aug 2015

Scopus Subject Areas

  • Chemistry(all)
  • Materials Science(all)

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