An ultra-sensitive electrochemiluminescence platformbased on ZnONPs/Ni-foam and K2S2O8 for detection of chlorpyrifos

In this work, we presented a simple and enzyme-free electrochemiluminescence chlorpyrifos pesticide sensor based on decorated Ni-foamwith zinc oxide (ZnO) nanoparticles in the presence of peroxydisulfate as the strong co-reactant. To control ofmorphology of the Zinc oxide nanoparticles, the silica film was utilized as an effective template. The surface characterization of themodified electrode was performed by electrochemical impedance spectroscopy, BET and X-Ray diffraction analysis, field emission scanning electron microscopy and energy-dispersive X-ray tools. The developed ECL-based pesticide sensor showed excellent proficiency towards accurate detection of the chlorpyrifos with good reproducibility and long-term durability. A wide linear dynamic range was obtained for determination of chlorpyrifos within 1.0x10(-14) M to 8.5x10(-9) M with a low detection limit (3 sigma/m) of 9.5x10(-16) M. The ultra-sensitive ECL technique was truly utilized for ultra-trace analysis of chlorpyrifos in some water and fruits samples. These admissible outcomes presented a promising pathway in the detection of chlorpyrifos in real samples. (C) 2020 Published by Elsevier B.V.