首页|Silicon nitride nanoparticles-based radiative charge recombination chemiluminescence for the highly selective and sensitive detection of diquat
Silicon nitride nanoparticles-based radiative charge recombination chemiluminescence for the highly selective and sensitive detection of diquat
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Elsevier
Diquat (DQ) is widely applied in the agriculture industry to ensure crop yield and quality, but this compound poses a serious hazard to human beings. The design of an efficient sensing platform for DQ is essential for food safety and environmental protection. Here, we developed a radiative charge recombination chemiluminescence (CL) using silicon nitride nanoparticles (Si_3N_4 NPs) as luminophore via hypochlorite (NaClO) activation for DQ quantification. With more active sites (N-Cl) on the surface of Si_3N_4 NPs, Si_3N_4 NPs displayed specific CL performance toward DQ. Accordingly, a new CL system for DQ detection was fabricated with satisfactory linearity (10-200 μg/L) and detection limit (6.1 μg/L), relative standard deviation (RSD) was lower than 1%. This new CL assay does not respond to other pesticides, and no interferences from metal ions that have been reported before in the DQ CL sensors. The CL mechanism was proposed that Si_3N_4 NPs act as the catalyst to accelerate the generation of superoxide radical (O_2~(·-)) from DQ, and then the radiative charge recombination of Si_3N_4 NPs occurs between the O_2~(·-) and exogenous holes for extraordinary CL emission. This work provides a general route for the construction of nanoparticle CL probe, which will aid in the monitoring of pollutants.
Dayang Zhao、Yuxian Zhou、Hui Gong、Jing Gou、Xin Xiao、Houjing Liu
展开 >
Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Institute of Applied Chemistry, Guizhou University, Guiyang 550025, China
NETL
NSTL
Elsevier
