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An electrochemical impedance study of core/shell nanocomposites containing MFe2O4@P(Pyrrole-co-o-toluidine)

Dina F. Katowah, A. Timoumi, Gharam I. Mohammed, and Mahmoud A. Hussein

Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia

 

E-mail: dfkatoaah@hotmail.com

Received: 20 November 2021  Accepted: 14 May 2022

Abstract:

We report a synthesis of interesting nanocomposites (NCs) formed by copolymer poly (pyrrole-co-o-toluidine) (P(Py-co-OT)) and spinel ferrite MFe2O4 nanoparticles (NPs) (M = Mg, Co, Ni, Cu and Zn) and examine how various ferrites affect properties. The synthesis of MFe2O4@P(Py-co-OT) NCs was done at fixed percentage (20%) of different MFe2O4 NPs, whereas MFe2O4 NPs were synthesized by an egg-white method. P(Py-co-OT) and MFe2O4@P(Py-co-OT) NCs’ structural, morphological, thermal, and electrical properties involving Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy-dispersive X-ray (EDX), transmission electron microscopy (TEM), thermogravimetric analysis (TGA–DTG), four-probe resistivity instrument, and a computer-controlled impedance analyser were measured. FTIR and XRD results confirmed how MFe2O4@P(Py-co-OT) NCs were formed and MFe2O4 showed a spinel structure. Notably, the structural properties indicated NCs’ core–shell structure. The analysis of TGA–DTG presented that NCs’ thermal stability was improved by CoFe2O4 and NiFe2O4 NPs. The ac conductivity gauged as a temperature function showed that NiFe2O4 NPs improved the conductivity of NCs. The dielectric was measured as a frequency function, and the result indicated that the electrical conductivity is thermally activated with special attention to the Ni substituent in the form of NiFe2O4@P(Py-co-OT).

Keywords: Copolymer Poly(Py-co-OT); MFe2O4; Core–shell; Electrical properties; Thermal properties; Electrochemical impedance

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02281-2

 

Chemical Papers 76 (9) 5705–5719 (2022)

Monday, June 17, 2024

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