Strong quantum confinement effect in nanocrystalline cerium oxide

被引：49
|
作者：
Arul, N. Sabari [1 ,2 ]
Mangalaraj, D. [1 ]
Chen, Pao Chi [2 ]
Ponpandian, N. [1 ]
Viswanathan, C. [1 ]
机构：
[1] Bharathiar Univ, Dept Nanosci & Technol, Coimbatore 641046, Tamil Nadu, India
[2] Lunghwa Univ Sci & Technol, Dept Chem & Mat Engn, Tao Yuan, Taiwan
来源：
MATERIALS LETTERS | 2011年 / 65卷 / 17-18期
关键词：
Nanoparticles; Cerium oxide; Structural; Precipitation; Quantum confinement; Optical absorption; ULTRAVIOLET-ABSORPTION; NANOPARTICLES; NANORODS; SIZE; NANOSTRUCTURES; CONVERSION; SHAPES;
D O I：
10.1016/j.matlet.2011.05.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Highly uniform and well-dispersed cerium oxide quantum dots were successfully synthesized by simple precipitation method by using cerium ammonium nitrate and ammonium hydroxide as precursor materials with suitable conditions. The X-ray diffraction pattern indicates the formation of cubic phase CeO(2). The average particle size of cerium oxide from high resolution transmission electron microscopy (HRTEM) was found to be 3 nm. The X-ray photoelectron (XPS) spectrum confirms the presence of Ce(3+) in CeO(2). Optical studies by UV-vis spectroscopy for the synthesized CeO(2) nanoparticles exhibit a blue shift (E(g) = 3.78 eV) with respect to the bulk material (E(g) = 3.15 eV) due to quantum confined exciton absorption. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：2635 / 2638
页数：4
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