Fabrication of a nitrogen-doped graphene quantum dot from MOF-derived porous carbon and its application for highly selective fluorescence detection of Fe3+. Issue 2 (12th November 2014)

• Record Type: Journal Article
• Authors: Xu, Hongbo; Zhou, Shenghai; Xiao, Lili; Wang, Huanhuan; Li, Shouzhu; Yuan, Qunhui
• Is Part Of: Journal of materials chemistry. Volume 3:Issue 2(2015)
• Page Start: 291
• Page End: 297
• Publication Date: 2014-11-12
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c4tc01991a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A new strategy for in situ formation and separation of fluorescent N-GQDs for Fe 3+ sensing was developed, with MOFs as precursors. Abstract : Nitrogen doping of carbon quantum dots results in improved fluorescence performance and a wider range of applications in photocatalysis, sensors, bioimaging, etc. Herein, a water-soluble and well-crystallized nitrogen-doped graphene quantum dot (N-GQD) has been obtained by using a MOF-derived carbon (ZIF-8C) as a new source of graphitic sheets. The preparation is based on a rapid, eco-friendly and efficient acid vapour cutting strategy, which is different from previously reported solution chemistry routes. The as-prepared N-GQD is photoluminescent and exhibits an excitation-independent behaviour. Because of the presence of O-functional groups on the surface, the obtained N-GQD can serve as a fluorescent sensing probe for highly selective detection of Fe 3+ ions with a detection limit of 0.08 μM (at a signal-to-noise ratio of 3). This work would enable new opportunities for the wider use of MOF-based materials and also contribute to the fluorescent analysis of Fe 3+ .