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

页码：2635 / 2638

页数：4

共 22 条

[1] Reverse micelles directed synthesis of mesoporous ceria nanostructures
Gu, Fubo
Wang, Zhihua
Han, Dongmei
Shi, Chen
Guo, Guangsheng
[J]. MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2007, 139 (01): : 62 - 68
[2] Directed assembly of one-dimensional nanostructures into functional networks
Huang, Y
Duan, XF
Wei, QQ
Lieber, CM
[J]. SCIENCE, 2001, 291 (5504) : 630 - 633
[3] Ceria-based solid electrolytes - Review
Inaba, H
Tagawa, H
[J]. SOLID STATE IONICS, 1996, 83 (1-2) : 1 - 16
[4] CTAB assisted hydrothermal synthesis, controlled conversion and CO oxidation properties of CeO2 nanoplates, nanotubes, and nanorods
Pan, Chengsi
Zhang, Dengsong
Shi, Liyi
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 2008, 181 (06) : 1298 - 1306
[5] Synthesis of nanocrystalline ceria particles for high temperature oxidation resistant coating
Patil, S
Kuiry, SC
Seal, S
Vanfleet, R
[J]. JOURNAL OF NANOPARTICLE RESEARCH, 2002, 4 (05) : 433 - 438
[6] Synthesis and optical properties of CdS quantum dots embedded in silica matrix thin films and their applications as luminescent solar concentrators
Reda, S. M.
[J]. ACTA MATERIALIA, 2008, 56 (02) : 259 - 264
[7] Shape of CeO2 nanoparticles using simulated amorphisation and recrystallisation
Sayle, TXT
Parker, SC
Sayle, DC
[J]. CHEMICAL COMMUNICATIONS, 2004, (21) : 2438 - 2439
[8] Template synthesis and photocatalytic properties of porous metal oxide spheres formed by nanoparticle infiltration
Shchukin, DG
Caruso, RA
[J]. CHEMISTRY OF MATERIALS, 2004, 16 (11) : 2287 - 2292
[9] Rare-earth oxide nanopolyhedra, nanoplates, and nanodisks
Si, R
Zhang, YW
You, LP
Yan, CH
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (21) : 3256 - 3260
[10] Structural properties of Sm3+ doped cerium oxide nanorods synthesized by hydrolysis assisted co-precipitation method
Srinivasan, R.
Bose, A. Chandra
[J]. MATERIALS LETTERS, 2010, 64 (18) : 1954 - 1956

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