Interfacial polymerized RGO/MnFe2O4/polyaniline fibrous nanocomposite supported glassy carbon electrode for selective and ultrasensitive detection of nitrite

In the present investigation fibrous nanocomposite of reduced graphene oxide, manganese ferrite and polyaniline (RGO/MnFe2O4/Polyaniline) has been synthesized through a facile two-step greener approach by a solvent less thermolysis synthesis procedure. Long-chain amine is used as the solvent, reducing agent and surface functionalizing agent. Morphology and chemical functionalities of the nanocomposites are characterized using microscopic and spectroscopic measurements. Modified electrode is fabricated using the nanocomposite material and the electrochemical property of nitrite has been investigated using cyclic voltammetry measurements, an analytical method of detection of nitrite is developed using the modified electrode based on differential pulse voltammetry. Under optimum conditions, RGO/MnFe2O4/PANI fibrous nanocomposite based modified electrode have shown the linear dynamic range from 0.05 to 12000 mu M with a detection limit of 0.015 mu M for the detection of nitrite. The nanocomposite modified electrode showed good anti-interference ability against various common metal ions and some organic interfering agents. The nanocomposite modified electrodeis applied to determine the nitrite level in tap water. The indicative performance of the RGO/MnFe2O4/PANI fibrous nanocomposite modified electrode widens the scope of applications of RGO/MnFe2O4/PANI fibrous nanocomposite materials for on-site monitoring of nitrite.