Jump to main content
Jump to site search

Issue 7, 2016
Previous Article Next Article

A green synthesis of highly fluorescent nitrogen-doped graphene quantum dots for the highly sensitive and selective detection of mercury(II) ions and biothiols

Author affiliations

Abstract

A facile and environmentally friendly strategy to prepare nitrogen-doped graphene quantum dots (N-GQDs) with a high quantum yield of 28.10% was reported. The obtained N-GQDs exhibited strong blue fluorescence emission with the maximum emission and excitation at 450 nm and 355 nm, respectively. Taking advantage of the effective quenching effect of Hg2+ on N-GQDs, such N-GQDs were developed for the efficient and sensitive detection of Hg2+ with a relatively low detection limit of 0.032 μM. Based on the selective coordination of biothiols and Hg2+, the fluorescence of the N-GQD/Hg system was recovered with the addition of biothiols. This fluorescent “Off–On” process showed a sensitive response to biothiols with a detection limit of 0.036 μM for cysteine and 0.034 μM for glutathione. Most importantly, the N-GQD-based fluorescence method was successfully used to monitor Hg2+ in real water samples and biothiols in serum samples.

Graphical abstract: A green synthesis of highly fluorescent nitrogen-doped graphene quantum dots for the highly sensitive and selective detection of mercury(ii) ions and biothiols

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Dec 2015, accepted on 16 Jan 2016 and first published on 20 Jan 2016


Article type: Paper
DOI: 10.1039/C5AY03208C
Citation: Anal. Methods, 2016,8, 1565-1571

  •   Request permissions

    A green synthesis of highly fluorescent nitrogen-doped graphene quantum dots for the highly sensitive and selective detection of mercury(II) ions and biothiols

    Z. Yan, X. Qu, Q. Niu, C. Tian, C. Fan and B. Ye, Anal. Methods, 2016, 8, 1565
    DOI: 10.1039/C5AY03208C

Search articles by author

Spotlight

Advertisements