Investigating the spectroscopic, photoluminescence, electrochemical impedance, and thermal characteristics of cerium oxide (CeO2) nanorods

Abstract

Cerium dioxide (CeO₂) or Ceria nanorods were produced in the current work, using the chemical precipitation approach. X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), UV–visible, photoluminescence (PL), and electrochemical impedance spectroscopy (EIS), thermogravimetric and differential thermal analyses (TG/DTA) were used to assess the material characteristics of the produced samples. The XRD results reveal that the CeO₂ nanorods crystallized into the cubic fluorite crystal system. Micro-strain dislocation density, gain size and cell volume of the samples were assessed. XPS examination was performed to verify the chemical states of the constituent elements in CeO₂ nanorods. FTIR spectral analysis was used to investigate chemical bonds and molecular vibrations in CeO₂ nanorods. SEM analysis was used to observe the grain structure of CeO₂ nanorods. UV–visible spectroscopy determined the CeO₂ optical absorption characteristics, bandgap, and Urbach energy. PL study and CIE-chromaticity mapping were used to investigate the light-emitting characteristics of the CeO₂ nanorods. The EIS method was applied to examine the impedance nature of CeO₂ nanorods. TGA/DTA investigations were performed to find the thermal characteristics of CeO₂ nanorods. The study findings indicate the usefulness of CeO₂ nanorods as electrodes and optoelectronic materials.

Graphical abstract