A new in-situ synthesized ternary CuNPs-PANI-GO nano composite for selective detection of carcinogenic hydrazine

In this paper, an in-situ synthesis of copper nanoparticles-polyaniline-graphene oxide (CuNPs-PANI-GO) nanocomposite is demonstrated. The formation of polyaniline (PANI) and copper nanoparticles (CuNPs) takes place simultaneously on the GO surface. The synthesized nanocomposite was characterized by UV-vis, FT-IR XRD, SEM and HR-TEM analysis. Further, the CuNPs-PANI-GO modified electrode shows an excellent electro catalytic activity towards the ultra-sensitive and selective sensing of carcinogenic hydrazine in the presence of 500-fold excess of various common interfering ions and physiological interference. The amperometric current response exhibits a wide linearity range from 40 to 480 nM for hydrazine and the limit of detection and quantification are found to be 0.0045 and 0.015 mu M (S/N = 3 & 10) respectively. In addition, the CuNPs-PANI-GO nanocomposite modified electrode exhibits an outstanding recovery results toward hydrazine in various real water samples. The results obtained from the present method were validated with HPLC method. (C) 2017 Elsevier B.V. All rights reserved.