Hollow Microporous Cerium Oxide Spheres Templated By Colloidal Silica

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We present a simple, solution-based synthetic route to hollow cerium oxide spheres. Thin layers (similar to 12 nm) of cerium oxide are deposited onto similar to 200 nm silica colloids using cerium nitrate and the silica cores are subsequently removed to yield hollow spheres. The spheres are composed of similar to 4 nm ceria. nanocrystals. Nitrogen adsorption isotherms indicate that the spheres are microporous with pore sizes of approximately 10 angstrom. The spheres are thermally stable to collapse and ripening up to 700 degrees C and are active for the catalytic combustion of carbons. The hollow ceria spheres developed in this work are attractive as building blocks for multicomponent catalysts.
Publisher
AMER CHEMICAL SOC
Issue Date
2009-10
Language
English
Article Type
Article
Keywords

PHOTOCATALYTIC PROPERTIES; INFRARED-SPECTROSCOPY; TIO2 NANOSPHERES; SHELL STRUCTURES; SIZE; METAL; NANOCRYSTALS; FABRICATION; PARTICLES; CATALYSTS

Citation

CHEMISTRY OF MATERIALS, v.21, no.19, pp.4577 - 4582

ISSN
0897-4756
DOI
10.1021/cm901516b
URI
http://hdl.handle.net/10203/94288
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