Tin Oxide/Reduced Graphene Oxide Nanocomposite-Modified Electrode for Selective and Sensitive Detection of Riboflavin

The present work evaluates the electrocatalytic performance of hydrothermally derived tin oxide/ reduced graphene nanocomposites (SnO2/RGO) toward riboflavin (VB2) detection. The physicochemical properties of the samples were studied by using various analytical techniques. The cyclic voltammetric profiles reveal the quasi-reversible catalytic behavior of electrodes and the linear plot evidence the interfacial electron transfer kinetics dominates the diffusion of VB2 on SnO2/RGO. The Anodic stripping voltammetry was used to optimize the pertinent time (80 sec) and potential (−1.3 V) to study their influence on anodic peak current responses. The square wave pulse voltammetry responses exhibit a significant linearity in the range of 0.1-150 μmol.L−1 and lower detection limit of 34 nmol.L−1 without any interference effect. The sensitivity perceived above 98.5% in real sample analyses assures that the prepared synergetic electrode can be employed for VB2 quantification in pharmaceutical compounds and energy drinks in practice with adequate outcomes.