Preparation of oxygen vacancy-controllable CeO2 by electrotransformation of a CeCl3 solution and its oxidation mechanism

Liu, Jiang; Zhang, Dou; Zhang, Ting‐an

doi:10.1016/j.ceramint.2019.11.052

Cited by 9 publications

(1 citation statement)

References 22 publications

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“…The peaks labeled as u‴ (916.28 eV), u″ (907.08 eV) and u (900.48 eV) belonging to 3d 3/2 /2 levels and the peaks v‴ (898.08 eV), v″ (888.88 eV) and v (882.48 eV) belonging to 3d 5/2 levels correspond to the Ce 4+ 3d states. The peaks labeled u’ (903.88 eV) referring to 3d 3/2 level and v′ (885.68 eV) relating to 3d 5/2 level are characteristic of Ce 3+ 3d states in the crystal lattice [ 67 , 68 ]. The characteristic XPS peaks of Ce 3+ and Ce 4+ exist in both samples, being in good agreement with previously reported studies [ 18 , 67 , 69 ].…”

Section: Resultsmentioning

confidence: 99%

Tailoring the Structural and Optical Properties of Cerium Oxide Nanoparticles Prepared by an Ecofriendly Green Route Using Plant Extracts

Fifere,

Ardeleanu,

Doroftei

et al. 2024

IJMS

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The present study explores an environmentally friendly green approach to obtain cerium oxide nanoparticles via a biomediated route using Mellisa officinalis and Hypericum perforatum plant extracts as reducing agents. The as-prepared nanoparticles were studied for their structural and morphological characteristics using XRD diffractometry, scanning electron microscopy, Raman, fluorescence and electronic absorption spectra, and X-ray photoelectron spectroscopy (XPS). The XRD pattern has shown the centered fluorite crystal structure of cerium oxide nanoparticles with average crystallite size below 10 nm. These observations were in agreement with the STEM data. The cubic fluorite structure of the cerium oxide nanoparticles was confirmed by the vibrational mode around 462 cm−1 due to the Ce-08 unit. The optical band gap was estimated from UV-Vis reflectance spectra, which was found to decrease from 3.24 eV to 2.98 eV. A higher specific area was determined for the sample using M. officinalis aqueous extract. The EDX data indicated that only cerium and oxygen are present in the green synthesized nanoparticles.

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