A new promising electrochemiluminescence probe based on ruthenium nanobeads/silver nanoparticles/graphene oxide modified electrode for ultra-trace analysis of bisphenol A

In this paper, a novel signal-off electrochemiluminescence sensor based on a ternary nanocomposite of ruthenium nanobeads/silver nanoparticles/graphene oxide is constructed on the surface of a glassy carbon electrode for ultra-trace determination of bisphenol A (BPA). Tris (2,2-bipyridine)ruthenium(II) as the popular ECL luminophore in the nano-scale was uniformly attached to the surface of the modified electrode. The luminophore ECL signal was tremendously enhanced in the presence of the silver nanoparticles. Also, the quantum dots of boron nitride as a robust co-reactant relative to ternary amines have exhibited excellent proficiency on the signal intensity of the luminophore. Morphology of the prepared electrode was carried out by electrochemical impedance spectroscopy, X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray analysis, and elemental mapping analysis. Also, the characterization of the boron nitride quantum dots was performed by transmission electron microscopy, X-ray diffraction, UV-Vis, and FT-IR spectroscopy. The prepared electrode was truly implemented by the ECL probe for the ultra-trace detection of BPA. For the ECL sensor, the wide linear range and low limit of detection were 9.0 x 10(-16) to 4.0 x 10(-10) M and 3.0 x 10(-16) M, respectively. Due to its superior properties to accurate detection of BPA, the ECL sensor was used as a promising probe for the quantitative analysis of BPA in bottle samples. [GRAPHICS] .