Ceria rhombic microplates: Synthesis, characterization and catalytic activity

N. K. Renuka*, A. K. Praveen, C. U. Aniz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Herein, we report the synthesis, characterization, and catalytic activity of ceria rhombic micro plates obtained from aqueous cerium nitrate in presence of urea and CTAB. The material was characterized using SEM, TEM, XRD (low and wide angle), FTIR spectra, N2 adsorption, UV-DRS, and XPS analysis. The ceria consisted of plates of edge length ∼1 μm, and thickness ∼100 nm. BET surface area, and pore volume of the microplates were 57 m2/g, and 0.03 cm3/g, respectively. The particle size of the material was calculated from TEM analysis, XRD study, and BET surface area analysis. Cubic cerianite crystallites (CeO2) were detected by powder XRD, while the presence of Ce3+ was also evident from XPS and DR UV spectroscopy study. Tetravalent cerium constituted 56% of the total composition, as revealed by XPS analysis. Both Ce2O3 as well as oxygen vacancy contributed towards the presence of Ce3+ in the sample. The direct optical band gap of ceria is blue-shifted with respect to the bulk material indicating quantum-size confinement in nano crystallites in the plate structure. Bilayer assembly of CTAB has been proposed during the formation of ceria microplates. The system exhibited extremely high CO oxidation activity than the corresponding bulk oxide.

Original languageEnglish
Pages (from-to)35-41
Number of pages7
JournalMicroporous and Mesoporous Materials
Volume169
DOIs
StatePublished - 15 Mar 2013
Externally publishedYes

Bibliographical note

Funding Information:
The financial assistance received from Kerala State Council for Science Technology and environment is gratefully acknowledged.

Keywords

  • CO oxidation
  • Ceria
  • Electron microscopy
  • Microplates
  • XPS

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials

Fingerprint

Dive into the research topics of 'Ceria rhombic microplates: Synthesis, characterization and catalytic activity'. Together they form a unique fingerprint.

Cite this