Preparation of Free-Standing and Flexible Graphene/Ag Nanoparticles/Poly(pyronin Y) Hybrid Paper Electrode for Amperometric Determination of Nitrite.

摘要: A flexible and free-standing graphene-based hybrid paper was successfully fabricated by successive applications of vacuum filtration electropolymerization. First, a suspension including graphene oxide (GO) silver nanoparticles (AgNPs) prepared, GO/AgNPs obtained vacuum-filtration this through membrane. This transformed to rGO/AgNPs using both chemical reduction with HI thermal annealing procedures. rGO/AgNPs/poly(PyY) electrode formed electropolymerization Pyronin Y (PyY) on from PyY monomer-containing (pH 1.0) solution. Structural, chemical, morphological characterization carried out scanning electron microscopy, X-ray photoelectron spectroscopy, diffraction, Raman infrared UV-vis absorption four-point probe conductivity measurement, cyclic voltammetry techniques. Electrooxidation nitrite has been achieved at 860 mV linear range 0.1-1000 μM, sensitivity 13.5 μAμM(-1)cm(-2), detection limit 0.012 μM. Amperometry studies have shown that the is suitable for amperometric determination in standard laboratory samples real samples. Moreover, selectively detects even presence 100-fold common ions exhibits an excellent operational stability good flexibility.