Abstract
A novel ferric oxide/multi-walled carbon nanotubes (\(\hbox {Fe}_{2}\hbox {O}_{3}\)/MWCNTs)-modified glassy carbon electrode (GCE) was prepared by drop casting \(\hbox {Fe}_{2}\hbox {O}_{3}\)/MWCNTs onto the surface of GCE. Scanning electron microscopy (SEM) image shows that the \(\hbox {Fe}_{2}\hbox {O}_{3}\)/MWCNTs has a nanostructure. Cyclic voltammetry (CV) results show that the \(\hbox {Fe}_{2}\hbox {O}_{3}\)/MWCNTs-modified GCE presents excellent electrochemical activity in the presence of 1 mM nitrite in a 0.1 M phosphate-buffered saline (PBS) to compare the \(\hbox {Fe}_{2}\hbox {O}_{3}\) and MWCNTs-modified GCE. Differential pulse voltammetry (DPV) results also show that the \(\hbox {Fe}_{2}\hbox {O}_{3}\)/MWCNTs has excellent electrocatalytic performance to nitrite in a pH 7.0 PBS. The amperometric response result shows that the \(\hbox {Fe}_{2}\hbox {O}_{3}\)/MWCNTs-modified GCE can be used to detect nitrite concentration in a wide linear range of \(10\textendash 1000\, \upmu \hbox {M}\) with a detection limit of \(0.1\, \upmu \hbox {M}\).
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Lin, X.R., Zheng, Y.F. & Song, X.C. \(\hbox {Fe}_{2}\hbox {O}_{3}\)/MWCNTs nanocomposite decorated glassy carbon electrode for the determination of nitrite. Bull Mater Sci 41, 35 (2018). https://doi.org/10.1007/s12034-018-1553-y
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DOI: https://doi.org/10.1007/s12034-018-1553-y