Hydrothermal Synthesis of CeO₂ Nanocrystals Using Oleate-Modified Precipitation Method

Abstract:

Monodispersed ceria nanocrystals have been synthesized by an oleate-modified precipitation method combined with a hydrothermal treatment at 200°C. TEM observation indicated that ceria nanoparticles with low-crystallinity were produced by synthesis at room temperature, which were crystallized by subsequent heat treatment to form nanocrystals. Produced ceria nanocrystals were well dispersed in a nonpolar solvent and were hardly agglomerated. TEM observation and Raman spectroscopy clarified that the size of ceria nanocrystals was in the range of 2-7 nm. Interparticle distance of cerium nanocrystals two-dimensionally aligned was in the range of 1.5-4 nm, which corresponds to the exclusive distance of oleic chains. Oleate-modified ceria nanocrystals exhibited strong fluorescence by green-laser excitation. Fluorescent behavior of ceria nanocrystals indicated that oleate detachment from the ceria surface and particle growth of ceria nanocrystals could be induced by laser irradiation.

• Periodical: Advanced Materials Research (Volumes 463-464)
• Pages: 1501-1505
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.463-464.1501
• Online since: February 2012
• Authors: Katsutoshi Kobayashi, Masaaki Haneda, Masakuni Ozawa
• Keywords: Ceria, Fluorescence, Hydrothermal Treatment, Inorganic Nanocrystals, Oleate-Modified Precipitation Method

References

[1] E.P. Murray, T. Tsai and S.A. Barnett, Nature, 400, 649 (1999).

[2] R. Di Monte and J. Kaspar, J. Mater. Chem., 15, 633 (2005).

[3] A. Corma, P. Atienzar, H. García and J.Y. C. -Ching, Nature Mater., 3, 394 (2004).

[4] S. Tsunekawa, T. Fukuda and A. Kasuya, J. Appl. Phys., 87, 1318 (2000).

[5] X.D. Feng, D.C. Sayle, Z.L. Wang, M.S. Paras, B. Santora, A.C. Sutorik, T.X.T. Sayle, Y. Yang, Y. Ding, X.D. Wang and Y.S. Her, Science, 312, 1504 (2006).

DOI: 10.1126/science.1125767

[6] X. Wang and Y. Li, Chem. Commun., 2901 (2007).

[7] M. Niederberger, G. Garnweitner, J. Buha, J. Polleux, J. Ba and N.J. Pinna, Sol-Gel Sci. Technol., 40, 259 (2006).

DOI: 10.1007/s10971-006-6668-8

[8] S.G. Kwon and T. Hyeon, Acc. Chem. Res., 41, 1696 (2008).

[9] H. Deng, S. Yang, S. Xiao, H. -M. Gong and Q. -Q. Wang, J. Am. Chem. Soc., 130, 2032 (2008).

[10] S. Yang and L. Gao, J. Am. Chem. Soc., 128, 9330 (2006).

[11] T. Taniguchi, T. Watanabe, N. Sakamoto, N. Matsushita and M. Yoshimura, Cryst. Growth Des., 8, 3725 (2008).

[12] T. -D. Nguyen and T. -O. Do, J. Phys. Chem. C, 113, 11204 (2009).

[13] Z.L. Wang and X. Feng, J. Phys. Chem. B, 107, 13563 (2003).

[14] F. Zhang, Q. Jin and S. -W. Chan, J. Appl. Phys., 95, 4319 (2004).

[15] K. Kaneko, K. Inoue, B. Freitag, A.B. Hungria, P.A. Midgley, T.W. Hansen, J. Zhang, S. Ohara and T. Adschiri, Nano Lett., 7, 421 (2007).

DOI: 10.1021/nl062677b

[16] A. Tanaka, H. Kamikubo, M. Kataoka, Y. Hasegawa and T. Kawai, Langmuir, 27, 105 (2011).

[17] W.H. Weber, K.C. Hass and J.R. McBride, Phys. Rev. B, 48, 178 (1993).

[18] J.E. Spanier, R.D. Robinson, F. Zhang, S. -W. Chan and I.P. Herman, Phys. Rev. B, 64, 245407 (2001).