Preparation of porous M2O3-doped ceria particles by controlled co-precipitation
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A controlled co-precipitation technique was used to synthesize porous M2O3-doped (M = Gd, Sm) CeO2submicrometer particles with a narrow size distribution. Various precipitates in spherical or oval shape were obtained. The particles were made from a nitrate/urea solution by consideration of three aspects: the addition sequence of M-nitrate into Ce-nitrate/urea solution, the concentration ratio of M/Ce in the nitrate solutions, and the effect of seeding. Heterogeneous and secondary precipitations of fine particles and the cross-section of the particles were analyzed by electron microscopes (SEM and TEM) equipped with energy dispersive X-ray spectroscopy (EDS). The differential precipitation rate of Ce-and Me-nitrates in the urea solution, and the specific surface area of the synthesized powder calcined at temperatures up to 750 ο C are also reported.
Abstract
A controlled co-precipitation technique was used to synthesize porous M2O3-doped (M = Gd, Sm) CeO2submicrometer particles with a narrow size distribution. Various precipitates in spherical or oval shape were obtained. The particles were made from a nitrate/urea solution by consideration of three aspects: the addition sequence of M-nitrate into Ce-nitrate/urea solution, the concentration ratio of M/Ce in the nitrate solutions, and the effect of seeding. Heterogeneous and secondary precipitations of fine particles and the cross-section of the particles were analyzed by electron microscopes (SEM and TEM) equipped with energy dispersive X-ray spectroscopy (EDS). The differential precipitation rate of Ce-and Me-nitrates in the urea solution, and the specific surface area of the synthesized powder calcined at temperatures up to 750 ο C are also reported.
참고문헌 (24)
- G. J. Offer, , J. Am. Ceram. Soc, 92, pp.763~780 (2009)
- S. Lee, , J. Electrochem. Soc, 151, pp.A1319-13~A1319-23 (2004)
- T. J. Huang, , J. Power Source, 173, pp.959~964 (2007)
- T. J. Huang, , J. Power Source, 181, pp.62~68 (2008)
- L. Blum, , Int. J. Appl. Ceram. Techno l, 2(6), pp.482~492 (2005)
- M. Mogensen, , Annu. Rev. Mater. Res, 33, pp.321~331 (2003)
- X. Zhang, , Fuel, 81, pp.989~996 (2002)
- V. Esposito, , J. Am. Ceram. Soc, 91, pp.1037~1051 (2008)
- S. Omar, , J. Am. Ceram. Soc, 92, pp.2674~2681 (2008)
- V. V. Kharton, , Solid State Ionics, 174, pp.135~149 (2004)
- L. H. Luo, , Mat. Sci. Eng. A, 429, pp.266~271 (2006)
- R. Peng, , Mat. Lett, 56, pp.1043~1047 (2002)
- Y. Wang, , Sci. Technol. Adv. Mater, 4, pp.229~238 (2003)
- S. Zha, , J. Power Sources, 115, pp.44~48 (2003)
- J. Li, , Chem. Mater, 13, pp.2913~2920 (2001)
- J. Li, , J. Am. Ceram. Soc, 86, pp.915~921 (2003)
- A. I. Y. Tok, , Mat. Sci. Eng. A, 383, pp.229~234 (2004)
- J. Y. Yu, , Mater. Chem. Phys, 118, pp.410~416 (2009)
- J. M. Sung, , J. Euro. Ceram. Soc, 27, pp.2605~2611 (2007)
- S. E. Lin, , J. Am. Ceram. Soc, 89, pp.527~533 (2006)
- S. E. Lin, , J. Am. Ceram. Soc, 91, pp.1121~1128 (2008)
- W. H. R. Shaw, , J. Chem. Soc, 77, pp.4729~4733 (1955)
- W. P. Hsu, , Langmir, 4, pp.31~37 (1988)
- F. Zhou, , J. Colloid Interf. Sci, 307, pp.135~138 (2007)