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  • 文献标题:   Nitrogen doped graphene quantum dots as a fluorescent probe for mercury(II) ions
  • 文献类型:   Article
  • 作　　者:   LIU YF, TANG XS, DENG M, CAO YL, LI YJ, ZHENG H, LI FH, YAN FB, LAN TY, SHI LL, GAO L, HUANG LG, ZHU T, LIN H, BAI YZ, QU DR, HUANG XB, QIU F
  • 作者关键词:   nitrogen doped graphene quantum dot, fluorescentprobe, fluorescence quenching, hg2+ detection, modified sternvolmer equation, static dynamic quenching
  • 出版物名称:   MICROCHIMICA ACTA
  • ISSN:   0026-3672 EI 1436-5073
  • 通讯作者地址:   Chongqing Univ
  • 被引频次:   24
  • DOI:   10.1007/s00604-019-3249-4
  • 出版年:   2019

▎ 摘　　要

A highly selective fluorescent probe for Hg2+ is reported. It consists ofnitrogen doped graphene quantum dots (NGQDs) that are nearly sphericalin shape, have an average diameter of 2.7nm and excitation-independent emission. The bluefluorescence of the NGQDs (with maximum excitation/emission at 378/447nm) is quenched by Hg2+ due to both dynamic and static quenching. The probe has a wide detection range (2.5M - 800M) and a limit of detection of 2.5M. The dynamic andstaticquenching constants are 417M(-1) and 63500M(-1), respectively. The probe was used to quantfy Hg2+ in spiked real water samples with satisfactory results.