ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis and supercapacitor performance of polyaniline-titanium dioxide-samarium oxide (PANI/TiO₂-Sm₂O₃) nanocomposite

Zaid H. Mahmoud, Reem Adham AL-Bayati, and Anees A. Khadom

Department of Chemistry, College of Science, Al-Mustansiriyah University, Baghdad, Iraq

E-mail: zaidhameed_91@yahoo.com

Received: 22 August 2021  Accepted: 22 October 2021

Abstract:

TiO₂-Sm₂O₃ binary oxide has been successfully synthesized using a two steps photolysis method with UV-irradiation (15 W and 256 nm) as a power source of irradiation system, and it modified PANI during simple oxidative polymerization route to get polyaniline/Sm₂O₃-TiO₂ nanocomposite. The structural, morphology and electrochemical properties of as-synthesized polyaniline /Sm₂O₃-TiO₂ nanocomposite have been estimated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), Field Emission scanning electron microscope (FE-SEM), Chronopotentiometry (CP), Cyclic voltammetry (CV) and Electrochemical Impedance spectroscopy (EIS). The measurements from XRD exhibit synthesis anatase TiO₂ phase with tetragonal structure and (monoclinic and cubic) mixture structure of Sm₂O₃. The FE-SEM images display prepare spherical nanoparticles that covered fiber morphology of polyaniline. Interestingly the synthesized polyaniline/Sm₂O₃-TiO₂ nanocomposite demonstrates supercapacitance properties with value 881F/g and 141wh/kg, which observed to be larger than pure polyaniline and polyaniline/Sm₂O₃. In addition to, the galvanostatic charge–discharge (GCD) properties obtained the nature of pseudocapacitive for PANI/Sm₂O₃-TiO₂ nanocomposite. The EIS results exhibit the superior electrochemical behavior for PANI/TiO₂-Sm₂O₃ compared with PANI and TiO₂-Sm₂O₃.

Keywords: Pseudocapacitive; Galvanostatic charge–discharge; Electrochemical impedance spectroscopy; Polyaniline; Nanofibers

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-01948-6

Chemical Papers 76 (3) 1401–1412 (2022)