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1, 2-dithioglycol functionalised carbon nitride quantum dots as a "turn – off" fluorescent sensor for mercury ion detection

Wang, Jun et al.

International journal of environmental analytical chemistry. Volume 99:Issue 8 (2019); pp 796-807 -- Taylor & Francis

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  • Title:
    1, 2-dithioglycol functionalised carbon nitride quantum dots as a "turn – off" fluorescent sensor for mercury ion detection
  • Author: Wang, Jun;
    Cao, Yu;
    Wang, Chengyin;
    Chong, Hui;
    Wang, Guoxiu
  • Found In: International journal of environmental analytical chemistry. Volume 99:Issue 8 (2019); pp 796-807
  • Journal Title: International journal of environmental analytical chemistry
  • Subjects: Chemistry, Analytic--Periodicals; Ecology--Periodicals; Environmental chemistry--Periodicals; Pollution--Periodicals; DTG-CNQDs--surface functionalisation--fluorescent probe--mercury ion; Dewey: 577.14
  • Rights: legaldeposit
  • Publication Details: Taylor & Francis
  • Abstract: ABSTRACT:

    A kind of 1, 2-dithioglycol (DTG) functionalised carbon nitride quantum dots (DTG-CNQDs) was designed for the first time by modifying DTG on the surface of carbon nitride quantum dots (CNQDs). The as-prepared DTG-CNQDs exhibit strong blue fluorescence under ultraviolet light and have a high quantum yield of 27%. Experiments show that Hg 2+ has a good quenching effect on the fluorescence of DTG-CNQDs. In phosphate buffer (PBS, 10 mM, pH 6.0), the fluorescence quenching rate (F0/F) has a good linear relationship with the concentration of Hg 2+ in the range of 0.020–0.50 μM with detection limit of 0.63 nM. This fluorescent probe possesses high sensitivity and good selectivity, which can be applied in the rapid detection of Hg 2+ in tap and lake water samples.


  • Identifier: System Number: LDEAvdc_100085479709.0x000001; Journal ISSN: 0306-7319; 10.1080/03067319.2019.1611800
  • Publication Date: 2019
  • Physical Description: Electronic
  • Shelfmark(s): ELD Digital store

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