Click here to view fulltext PDF

Permanent link:
https://www.ias.ac.in/article/fulltext/boms/038/05/1135-1139

CeO₂; nanopebbles; structural; XAS; quantum confinement effect.

Cerium oxide (CeO₂) nanopebbles have been synthesized using a facile hydrothermal method. X-ray diffraction pattern (XRD) and transmission electron microscopy analyses confirm the presence of CeO₂ nanopebbles. XRD shows the formation of cubic fluorite CeO₂ and the average particle size estimated from the Scherrer formula was found to be 6.69 nm. X-ray absorption spectrum of CeO₂ nanopebbles exhibits two main sharp white lines at 880 and 898 eV due to the spin orbital splitting of 𝑀₄ and 𝑀₅. Optical absorption for the synthesized CeO₂ nanopebbles exhibited a blue shift (𝐸_g = 3.35 eV) with respect to the bulk CeO₂ (𝐸_g = 3.19 eV), indicating the existence of quantum confinement effects.

N Sabari Arul^{1 2} D Mangalaraj² Jeong In Han¹

1. Department of Chemical and Biochemical Engineering, Dongguk University-Seoul, 100715 Seoul, South Korea
2. Department of Nanoscience and Technology, Bharathiar University, Coimbatore 641 046, India

Published

September 2015

Manuscript received

17 October 2014

Accepted

13 April 2015