Title: Preparation and characterisation of transition metal ions (Fe³⁺, Mn²⁺) doped CdO nanoparticles

Authors: Sara Abbas; Hadi Basma; Ramadan Awad

Addresses: Department of Chemistry, Faculty of Science, Beirut Arab University, Debbieh, Lebanon ' Department of Physics, Faculty of Science, Beirut Arab University, Debbieh, Lebanon ' Department of Physics, Faculty of Science, Beirut Arab University, Debbieh, Lebanon

Abstract: Pure, Fe³⁺, and Mn²⁺ doped CdO nanoparticles were prepared by the wet co-precipitation technique. The crystal structure, vibrational modes, and morphology of the CdO nanoparticles were studied using X-ray powder diffraction (XRD), Fourier transmission infrared spectroscopy (FTIR), and transmission electron microscopy (TEM), respectively. XRD and TEM studies showed a reduction in the lattice parameters and particle size relative to the pure sample, respectively. The Cd-O vibration bands were detected by the FTIR analysis. The photoluminescence spectra showed deep-level blue and violet emissions attributed to Cd vacancies. The energy band-gap obtained from UV-visible spectroscopy (UV-Vis) was enhanced with the transition metal (T-M) ions substitutions. The M-H measurements showed a transition from diamagnetic to ferromagnetic behaviours as an effect of T-M substitution. Accordingly, this study reveals that the magneto-optical properties of CdO nanoparticles can be tuned by substitution with different transition metal ions, allowing for different applications such as magnetically recyclable photocatalysts and spin-valve devices.

Keywords: CdO nanoparticles; M-H hysteresis; photoluminescence; transition metal ions; UV-Vis spectroscopy.

DOI: 10.1504/IJNP.2022.122940

International Journal of Nanoparticles, 2022 Vol.14 No.1, pp.31 - 46

Received: 04 Apr 2021
Accepted: 15 Jul 2021
Published online: 17 May 2022 *