Abstract
CeO2@SiO2 (core@shell) nanoparticles were prepared by means of chemical precipitation technique. Results from X-ray diffraction, transmission electron microscopy (TEM), and Zeta-potential analyses provide strong microscopic and spectroscopic evidences to prove that CeO2 particles have been encapsulated inside amorphous SiO2 shell. As revealed from TEM investigations, the average grain size of CeO2@SiO2 is significantly smaller than that of uncoated CeO2 nanoparticles prepared under the same conditions, indicating it is an effective method to restrict the grain enlargement of nanocrystalline CeO2 by coating a thin layer of SiO2 at elevated temperatures. The CeO2@SiO2 nanoparticles display a similar surface electric character behavior to that of SiO2, and its dispersibility in water is improved.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bunluesin T, Gorte RJ, Graham GW (1997) CO oxidation for the characterization of reducibility in oxygen storage components of three-way automotive catalysts. Appl Catal B Environ 14:105–115. doi:10.1016/S0926-3373(97)00016-7
Bunluesin T, Gorte RJ, Graham GW (1998) Studies of the water-gas-shift reaction on ceria-supported Pt, Pd, and Rh: implications for oxygen-storage properties. Appl Catal B Environ 15:107–114. doi:10.1016/S0926-3373(97)00040-4
Craciun R, Shereck B, Gorte RJ (1998) Kinetic studies of methane steam reforming on ceria-supported Pd. Catal Lett 51:149–153. doi:10.1023/A:1019022009310
Fu Q, Saltsburg H, Flytzani-Stephanopoulos M (2003) Active nonmetallic Au and Pt species on ceria-based water-gas shift catalysts. Science 301:935–938. doi:10.1126/science.1085721
Miki T, Ogawa T, Haneda M, Kakuta N, Ueno A, Tateishi S, Matsuura S, Sato M (1990) Enhanced oxygen storage capacity of cerium oxides in CeO2/La2O3/Al2O3 containing precious metals. J Phys Chem 94:6464–6467. doi:10.1021/j100379a056
Reddy BM, Khan A, Lakshmanan P, Aouine M, Loridant S, Volta J-C (2005) Structural characterization of nanosized CeO2–SiO2, CeO2–TiO2, and CeO2–ZrO2 catalysts by XRD, raman, and HREM techniques. J Phys Chem B 109:3355–3363. doi:10.1021/jp045193h
Song XL, Jiang N, Li YK, Xu DY, Qiu GZ (2008) Synthesis of CeO2-coated SiO2 nanoparticle and dispersion stability of its suspension. Mater Chem Phys 110:128–135. doi:10.1016/j.matchemphys.2008.01.042
Tang C-W, Kuo C-C, Kuo M-C, Wang C-B, Chien S-H (2006) Influence of pretreatment conditions on low-temperature carbon monoxide oxidation over CeO2/Co3O4 catalysts. Appl Catal A Gen 309:37–43. doi:10.1016/j.apcata.2006.04.020
Zarur AJ, Ying JY (2000) Reverse microemulsion synthesis of nanostructured complex oxides for catalytic combustion. Nature 403:65–67. doi:10.1038/47450
Zheng X-C, Wu S-H, Wang S-P, Wang S-R, Zhang S-M, Huang W-P (2005) The preparation and catalytic behavior of copper–cerium oxide catalysts for low-temperature carbon monoxide oxidation. Appl Catal A Gen 283:217–223. doi:10.1016/j.apcata.2005.01.007
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Mao, J., Bai, Y., Gu, L. et al. Preparation and characterization of size-controlled CeO2 nanoparticles coated with SiO2 . J Nanopart Res 12, 2045–2049 (2010). https://doi.org/10.1007/s11051-009-9762-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11051-009-9762-3