Continuous production of nitrogen-functionalized graphene nanosheets for catalysis applications

Kodepelly Sanjeeva Rao, Jaganathan Senthilnathan, Jyh Ming Ting, Masahiro Yoshimura

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15 Citations (Scopus)

Abstract

This study reports the "continuous production" of high-quality, few-layer nitrogen-functionalized graphene nanosheets in aqueous solutions directly from graphite via a two-step method. The initial step utilizes our recently developed peroxide-mediated soft and green electrochemical exfoliation approach for the production of few-layer graphene nanosheets. The subsequent step, developed here, produces nitrogen-functionalized graphene nanosheets via selective alkylation/basic hydrolysis reactions using rather a simple nitrogen precursor bromoacetonitrile, which was never reported in the literature. A possible reaction mechanism of the nitrogen-functionalized graphene formation is proposed. The proposed method allows the quantification of the phenolic and hydroxyl functional groups of anodic few-layer graphene via the derivatization chemistry approach. Additionally, a nitrogen-functionalized graphene-gold nanocrystal hybrid is prepared using gold nanocrystals obtained via the microwave irradiation of H[AuCl4] and trisodium citrate solution. A systematic investigation demonstrates that the nitrogen-functionalized graphene-gold nanocrystal hybrid shows enhanced catalytic reduction of carbonyl compounds such as benzaldehyde.

Original languageEnglish
Pages (from-to)12758-12768
Number of pages11
JournalNanoscale
Volume6
Issue number21
DOIs
Publication statusPublished - 2014 Nov 7

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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