Dual-emission carbon dots-stabilized copper nanoclusters for ratiometric and visual detection of Cr2O72- ions and Cd2+ ions.
J Hazard Mater
; 386: 121654, 2020 03 15.
Article
em En
| MEDLINE
| ID: mdl-31740316
ABSTRACT
The pollution of heavy metal increases greatly accompanying by the development of industries. So, it is very important to build up a quick and reliable technique for detection of heavy metal ions. In this work, we developed a simple and convenient method for ratiometric and visual detection of Cr2O72- ions and Cd2+ ions. We utilized glutathione as raw material to prepare cyan-emitting carbon dots (GSH@CDs). The GSH@CDs were further used as the template to prepare carbon dots-stabilized copper nanoclusters (GSH@CDs-Cu NCs) that displayed two well-separated emission peaks respectively at 450â¯nm and 750â¯nm. The GSH@CDs-Cu NCs can be applied for the ratiometric and visual detection of Cr2O72- and Cd2+ ions based on the fluorescence quenching or enhancement of GSH@CDs-Cu NCs at 750â¯nm. A linear range of 2-40⯵molâ¯L-1 with a detection limit of 0.9⯵molâ¯L-1 for Cr2O72- ions, and a linear range of 0-20⯵molâ¯L-1 with a detection limit of 0.6⯵molâ¯L-1 for Cd2+ ions were achieved based on this method. The fluorescent test strips for Cr2O72- ions were successfully prepared based on GSH@CDs-Cu NCs. Moreover, the GSH@CDs-Cu NCs were successfully applied to determine Cr2O72- and Cd2+ ions in real samples with promising results.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
J Hazard Mater
Assunto da revista:
SAUDE AMBIENTAL
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
China