• 文献标题:   A turn-on ratiometric fluorescent nanoprobe based on AgInZnS and nitrogen-doped graphene quantum dots for Cd2+ detection in lake water
  • 文献类型:   Article
  • 作  者:   LIU YF, GAO ZJ, SHAO XW, YANG JP, TANG XS, WANG J, CHEN WW, LIN H, DENG M, ZHU T
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF MATERIALS SCIENCE
  • ISSN:   0022-2461 EI 1573-4803
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1007/s10853-022-07721-8 EA SEP 2022
  • 出版年:   2022

▎ 摘  要

Excessive Cd2+ poses adverse influences on ecosystem and human beings, but its precise detection via a facile and environment-friendly method with resistance to interference is still a challenge. Here, a turn-on ratiometric fluorescent nanoprobe for Cd2+ detection is established using yellow-emission AgInZnS quantum dots (AIZS QDs) and blue-emission nitrogen-doped graphene quantum dots (NGQDs), which serve as a recognition unit and internal reference signal, respectively. Cd2+ could enhance the fluorescence of AIZS QDs due to the passivation of surface defects, while it has no significant effect on that of NGQDs. This nanoprobe has a large detection range from 0.5 to 100 mu M and a limit of detection low to 28.6 nM. It shows strong anti-interference ability for Cd2+ even in lake water samples with recovery from 98 to 101% and low relative standard deviation of 1.01%, indicating its excellent effectuation to real-application world. [GRAPHICS]