Preparation and characterization of size-controlled CeO2 nanoparticles coated with SiO2
Source abstract
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.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions · Advancements in Battery Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (10)
Show source-provided references
1. 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)00016-710.1016/S0926-3373(97)00016-7 ↗
2. 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)00040-410.1016/S0926-3373(97)00040-4 ↗
3. 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:101902200931010.1023/A:1019022009310 ↗
4. 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.108572110.1126/science.1085721 ↗
5. 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/j100379a05610.1021/j100379a056 ↗
6. 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/jp045193h10.1021/jp045193h ↗
7. 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.2008.01.04210.1016/j.matchemphys.2008.01.042 ↗
8. 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.2006.04.02010.1016/j.apcata.2006.04.020 ↗
9. Zarur AJ, Ying JY (2000) Reverse microemulsion synthesis of nanostructured complex oxides for catalytic combustion. Nature 403:65–67. doi: 10.1038/4745010.1038/47450 ↗
10. 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.2005.01.00710.1016/j.apcata.2005.01.007 ↗