A novel cathodic electrochemiluminescent sensor based on CuS/carbon quantum dots/g-C3N4 nanosheets and boron nitride quantum dots for the sensitive detection of organophosphate pesticide

In this project, a novel promising electrochemiluminescence probe based on ternary nanocomposite as CuS/ CQDs/g-C3N4NS was demonstrated for the accurate monitoring of diazinon as a popular organophosphate pesticide. This nanocomposite as a promoted luminophore was synthesized by a simple microwave method. Carbon quantum dots and copper sulfide nanostructures displayed a good cooperative effect on the signal improvement. Also, boron nitride quantum dots were introduced as a new and effective co-reactant in the negative potential window for a carbon-based electrochemiluminescence system for the first time. The ultrasensitive electrochemiluminescence platform was truly used for the analysis of diazinon. The broad linear dynamic range and low limit of detection were obtained from 1.0 x 10-15 to 5.0 x 10-9 M and 2.2 x 10-16 M, respectively. Owing to superior proficiency in accurate diazinon analysis, the developed sensor was used as a new applicable probe for quantitative analysis of diazinon in real samples.