科研之友
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摘要
A glassy carbon electrode modified with reduced graphene oxide and platinum nanocomposite film was developed simply by electrochemical method for the sensitive and selective detection of nitrite in water. The electrochemical reduction of graphene oxide (GO) efficiently eliminates oxygen-containing functional groups. Pt nanoparticles were electrochemically and homogeneously deposited on the ErGO surface. Field emission scanning electron microscopy (FE-SEM), Raman spectroscopy, attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) were used to examine the surface morphology and electrocatalytic properties of the Pt-ErGO nanocomposite film-modified electrode surface. The fabricated nitrite sensor showed good electrochemical performance with two linear ranges; one from 5 to 100 mu M (R-2=0.9995) and the other from 100 to 1000 mu M (R-2=0.9972) and a detection limit of 0.22 mu M. The proposed sensor was successfully applied for the detection of nitrite in tap water samples which proves performance of the Pt-ErGO nanocomposite films.
- 出版日期2017-2
