Electrocatalysis and detection of nitrite on a polyaniline‐Cu nanocomposite‐modified glassy carbon electrode

Abstract

A polyaniline (PANI)-Cu nanocomposite-modified electrode was fabricated by the electrochemical polymerization of aniline and the electrodeposition of copper under constant potentials on a glassy carbon electrode (GCE), respectively. Scanning electron microscope result shows that the PANI-Cu composite on the surface of the GCE displays the nanofibers having an average diameter of about 80 nm with lengths varying from 1.1 to 1.2 lm. The electrode exhibits enhanced electrocatalytic behavior to the reduction of nitrite compared to the PANI-modified GCE. The effects of applied potential, pH value of the detection solution, electropolymerization charge, temperature, and nitrite concentration on the current response of the composite-modified GCE were investigated and discussed. Under optimal conditions, the PANI-Cu composite-modified GCE can be used to determine nitrite concentration in a wide linear range (n ¼ 18) of 0.049 and 70.0 lM and a limit of detection of 0.025 lM. The sensitivity of the electrode was 0.312 lA lM À1 cm À2 . The PANI-Cu composite-modified GCE had the good storage stability.

Tailoring copper (II) methacrylate‐containing copolymers and its use as electrode modifier agent in electroanalytical applications

“…When the modified electrode was immersed in a solution of potassium hexacyanoferrate (III), K 3 [Fe(CN) 6 ], a pair of redox peaks appeared at potential of 0.68 − 0.72 V attributed to the Fe II /Fe III pair in the complex Cu 2 [Fe(CN) 6 ] formed within the polymeric film. Several works reported the application of copper polymeric films in determination of sulfite and nitrite but problems with repeatability and control of the amount of copper deposited on the electrode surface limits its use . In this work, Cu(II)MA‐based copolymers are presented as excellent option to manufacture of GCE modified with copper polymer that allows to increase the amount of copper on the electrode surface, which could improve the sensibility, lifetime, repeatability, and precision of the electroanalytical method.…”

Silver particle-decorated carbon paste electrode based on ionic liquid for improved determination of nitrite

“…Various electrode modifications, mainly in the form of thin layers on a glassy carbon substrate electrode (e.g. poly(3,4-ethylenedioxythiophene)/graphene nanocomposite, polyaniline/Cu nanocomposite and reduced graphene/ Pd nanocomposite to name a few), have been proposed [28][29][30].…”

Electron Beam Induced Tailoring of Electrical Characteristics of Organic Semiconductor Films

“…Conducting polymer-metal nanocomposites, a new class of materials, offers device design possibility with new functionality, in which the optimized properties of both organic and inorganic have been exploited [169][170][171][172][173][174][175]. Many appealing studies have been reported in literatures based on nanocomposites of PANI with different metals such as PANI-Ag [176,177], PANI-Au [178][179][180], PANI-Pt [181][182][183] and PANI-Cu [184,185]. PANI-Ag is one of the extensively considered nanocomposites because ease of preparation by in-situ approach i.e.…”