Highly Sensitive Voltammetric Sensor for Acid Yellow 3 Based on Cerium and Tin Dioxide Nanoparticles

A novel highly sensitive voltammetric sensor based on a glassy carbon electrode (GCE) modified with a mixture of cerium and tin dioxide nanoparticles (NPs) as a sensing layer was developed.Surfactants of various nature (anionic sodium dodecyl sulfate, cationic N-cetylpyridinium bromide, and non-ionic Triton X-100, Brij 35, and Tween-80) were used as dispersive agents for NPs.Complete suppression and a significant decrease in the dye oxidation peak occurred in the case of Tween-80 and sodium dodecyl sulfate, respectively.CeO 2 -SnO 2 NPs in Brij 35 gave the best response to Acid Yellow 3 caused by its adsorption at the electrode surface.Linear dynamic ranges of 0.50-7.5 and 7.5-25 mg L -1 with a detection limit of 0.13 mg L -1 of Acid Yellow 3 were achieved using differential pulse mode in Britton-Robinson buffer pH 5.0.