CHEMICAL FUNCTIONALIZATION OF OLIGOSACCHARIDE MOLECULES AS AN DETECTION AGENT FOR THE SENSITIVE DETECTION OF NITROPHENOL ISOMER USING COPPER OXIDE NANOPARTICLES DECORATED REDUCED GRAPHENE OXIDE NANOSHEET

Abstract

The present work describes the synthesis of beta-cyclodextrin (β-CD) functionalized copper oxide nanoparticles (CuONPs) encapsulated reduced graphene oxide (rGO) nanosheets (rGONS/β-CD/CuO) for the electrochemical detection of nitrophenol isomer such as ortho-nitrophenol. The chemical functionalization of stabilizing agent with the synthesized rGONS/CuO nanocomposites and the polymer stabilized rGONS/CD/CuO nanocomposites are investigated using FT-IR, XRD, SEM and TEM analysis. The morphological analysis confirms that oligosaccharide molecules are functionalized on the rGONS surface and also the encapsulated spherical shaped CuONPs on the rGONS/β-CD surface. The electrochemical study shows that the rGONS/β-CD/CuO/GCE exhibits a good electrochemical behaviour for the reduction of nitrophenol isomer. It shows good linear range of detection for ortho-nitrophenol with a sensitivity of 2.3 mAμM-1cm-2. The enhancement in the electrochemical behaviour of rGONS may be due to the host guest recognition and catalytic properties of β-CD and CuONPs respectively.