Synthesis of NiRu-metal organic framework nanosheets: as active catalyst for the fabrication of rapid and simple electrochemical sensor for the determination of sudan I in presence of bisphenol A

Foodstuff contaminants must always be monitored and analyzed in order to address their impact on human health. Hence, efforts continue to be made to achieve sensitive and selective simple detection protocols. Accordingly, the current work aimed construct the two-dimensional (2D) bimetallic nickel-ruthenium metal organic framework nanosheets (NiRu-MOF NSs) using a simple solvothermal protocol. Structural and morphological studies and bimetallic composition analysis were fulfilled by energy dispersive X-ray, field emission-scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), transmission electron microscope (TEM), Raman spectroscopy, N-2 adsorption-desorption isotherm and thermal gravimetric analyses (TGA). As-prepared 2D bimetallic NiRu-MOF NSs could be used to modify on screen printed electrode (SPE) surface, the resultant sensor of which (NiRu-MOF/SPE) was utilized to detect sudan I in presence of bisphenol A in the real specimens. According to electrochemical responses, our sensor displayed an impressive electrocatalytic behavior towards the oxidation of sudan I, with a great sensitivity (0.0846 mu A/mu M) in the range from 0.01 to 460.0 mu M and limit of detection of 8.0 nM with the signal to noise ratio (S/N) of 3. As-fabricated sensor could determine bisphenol A and sudan I in foodstuff samples and the reults of quantitative recoveries for each compound were satisfactory. [GRAPHICS]