Continuous production of nitrogen-functionalized graphene nanosheets for catalysis applications

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

研究成果: Article

16 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)12758-12768
頁數11
期刊Nanoscale
6
發行號21
DOIs
出版狀態Published - 2014 十一月 7

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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