Journal Article

Enhanced supercapacitor performance and ferromagnetic behavior of Ni-doped CeO2 quantum dots

Pushpanathan, K., Ponnar, M., Santhi, R., Ravichandran, S.

2020

Overview

This article focuses on structural, optical, magnetic, and dielectric behavior of Ni-substituted CeO 2 quantum dots synthesized by efficient chemical precipitation technique. Synthesized nanopowders were analyzed by XRD, FESEM, TEM, FT-IR, UV, PL, dielectric, electrochemical, and magnetic behavior. X-ray diffraction technique stipulated the nanopowders that exhibit FCC structure and don't have any unwanted phases. FESEM and TEM analyses showed that the particles are in the nanometer range and the microstructure alternation evidenced from spherical to the nanorods. The functional group and compositional study confirmed the substitution of Ni within CeO 2 . The UV–Vis absorption spectrum approved the blue shift in absorption and increase in bandgap from 3.39 to 4.20 eV. The photoluminescence study confirmed the strong blue emission with the increase of Ni concentration. VSM analysis demonstrated that the Ni-doped CeO 2 quantum dots are ferromagnetic nature and the magnetization increased. The electrochemical analysis confirmed the increase of supercapacitance property of CeO 2 nanoparticles with Ni at a low scan rate. The dielectric analysis suggested that the CeO 2 : Ni can be utilized for the capacitor application.

• Publisher: Springer US,Springer Nature B.V
• Subject: Absorption spectra / Cerium oxides / Characterization and Evaluation of Materials / Chemical precipitation / Chemical synthesis / Chemistry and Materials Science / Dielectric properties / Dielectrics / Electrochemical analysis / Electrons / Emission analysis / Ferromagnetism / Functional groups / Magnetic properties / Materials Science / Nanoparticles / Nanorods / Nickel / Optical and Electronic Materials / Photoluminescence / Quantum dots / Thermal analysis