Morphology-controllable synthesis and characterization of CeO2 nanocrystals--颗粒学报PARTICUOLOGY

Huang, Y., Cai, Y., Qiao, D., & Liu, H. (2011). Morphology-controllable synthesis and characterization of CeO2 nanocrystals. Particuology, 9(2), 170-173. https://doi.org/10.1016/j.partic.2010.07.023

Morphology-controllable synthesis and characterization of CeO₂ nanocrystals

Yangfeng Huang^*, Yebin Cai, Dongkai Qiao, Hao Liu

School of Mechanical & Electrical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China

10.1016/j.partic.2010.07.023

Volume 9, Issue 2, April 2011, Pages 170-173

Received 14 February 2010, Revised 14 July 2010, Accepted 19 July 2010, Available online 15 January 2011.

E-mail: yf9798@sohu.com

Highlights

Abstract

CeO₂ nanocrystals with different morphologies were synthesized by adjusting the pH value of the starting solution in water-in-oil microemulsion. The obtained samples were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis and different thermal analysis (TGA/DTA), Brunauer–Emmet–Teller (BET) surface area measurement, ultraviolet–visible absorption (UV–vis) spectroscopy and photoluminescence (PL) spectroscopy. Results show that the morphologies of CeO₂ were transformed from granular to spherical and to rod-like while the pH of the starting solution varied from 5 to 8 and to 11. All samples were indexed to the phase of CeO₂ and Ce(OH)₄, and the molar ratio of CeO₂to Ce(OH)₄ was deduced to be about 0.25. The morphologies of CeO₂ nanocrystals had but slight influence on their specific surface areas, UV–vis spectra and PL spectra. The band gap energies of different morphological samples were estimated by UV–vis spectroscopic method.

Graphical abstract

Keywords

CeO₂; pH value; Synthesis; Morphology; Characterization

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