• 文献标题:   Highly selective detection of phosphate ion based on a single-layered graphene quantum dots-Al3+ strategy
  • 文献类型:   Article
  • 作  者:   CHEN BB, LI RS, LIU ML, ZOU HY, LIU H, HUANG CZ
  • 作者关键词:   sgqdsal3+ strategy, phosphate ion, onoff type, selective detection
  • 出版物名称:   TALANTA
  • ISSN:   0039-9140 EI 1873-3573
  • 通讯作者地址:   Southwest Univ
  • 被引频次:   11
  • DOI:   10.1016/j.talanta.2017.09.007
  • 出版年:   2018

▎ 摘  要

Determination of phosphate ion (PO43-) is important in biomedical and environmental arrays because its controlling concentrations are associated with different pathologies or the quality of water. Herein, we report a new type of photoluminescence (PL) probe for highly selective detection of PO43- based on a single-layered graphene quantum dots chelating with aluminium ions (s-GQDs-Al3+) system. The PL of s-GQDs can be enhanced by Al3+ through the aggregation-induced emission enhancement (AIEE) effect. With the addition of PO43-, the PL of the s-GQDs-A13 system is faded away because PO43- has stronger coordination with Al3+ which results in the elimination of AIEE effect and the decrease in the PL intensity of the s-GQDs-Al3+ system. Therefore, the s-GQDs-Al3+ system can behave as an on-off type PL probe for PO43- detection. It is found that the PL intensity ratio (///0) of s-GQDs in the presence of Al3+ at 463 nm is proportional to the concentration of PO43- in the range of 0.25-7.5 M with the limit of detection as low as 0.1 0/1. This selective assay has a great application prospect in the complex matrixes owing to its simplicity and specificity for PO43- detection.