INVESTIGATION ON EMBELLISHMENT OF METAL NANOPARTICLES ON GRAPHENE NANOSHEETS AND ITS SENSING APPLICATIONS

Abstract

In the present work, β-cyclodextrin functionalized reduced graphene oxide-silver nanocomposites (GO-β-CD-Ag) are successfully synthesized using wet chemical technique. The GO-β-CD nanocomposites are firstly synthesized via hydrazine reduction. The different concentrations (0.002 M, 0.004 M, 0.006 M, 0.008 M and 0.01 M) of silver nanoparticles are embellished on the GO-β-CD surface by the chemical reduction of silver nitrate with sodium borohydrate as a reducing agent. The synthesized GO-β-CD-Ag nanocomposites are characterized using XRD, SEM and EDAX techniques. The XRD results confirmed that the β-CD molecules are effectively coated on the rGO surface and also the Ag nanoparticles with an average size of 23 nm are uniformly decorated on the GO-β-CD surface. The GO-β-CD-Ag nanocomposites modified glassy carbon electrode is employed for the selective determination of o-Nitrophenol. Cyclic voltammetry test is performed to determine the presence o-Nitrophenol compound. The result shows the oxidation and reduction potential for o-Nitrophenol at -0.25 V and -0.45 V respectively, suggests the successful determination of o-Nitrophenol by using the GO-CD-Ag nanocomposite modified electrode.