Binary Metal oxide Adsorbed Graphene Modified Glassy Carbon Electrode for Detection of Riboflavin

Tungsten oxide (W) decorated titanium oxide (T) adsorbed onto a graphene (Gr) and modified the glassy carbon electrode for the electrochemical quantification of riboflavin (RF) in edible food and pharmaceuticals. For comparison, nanocomposites are formed using graphene oxide (GO), reduced graphene oxide (rGO) and pure graphite (G) sheets to study the electrochemical activities towards riboflavin. The ternary WTGr modified GCE shows the highest electrocatalytic activity due to synergetic interactions between the metal oxide and graphene. The electrochemical observations are supported by the SEM, HRTEM, XRD, UV-Vis, Zeta potential (zeta) and size data. The sensor shows a wide linear range 20 nM-2.5 mu M with a detection limit 25.24 nM and sensitivity (4.249x10(-8) A/nM). The fabricated sensor is validated in real samples.

Automated summary

This study successfully prepared an electrochemical sensor for the quantification of riboflavin in edible food and pharmaceuticals by using tungsten oxide decorated titanium oxide and graphene composite material. The sensor showed high electrocatalytic activity and sensitivity, indicating potential applications in real samples.