Synthesis and silica coating of calcia-doped ceria/mica nanocomposite by seeded polymerization technique

Ahmed Mohamed El-Toni, Shu Yin, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Calcia-doped ceria is of potential interest as an ultraviolet (UV) radiation blocking material in personal care products because of the excellent UV light absorption property and low catalytic ability for the oxidation of organic materials superior to undoped ceria. In order to reduce the oxidation catalytic activity further, calcia-doped ceria was coated with amorphous silica by means of seeded polymerization technique. Generally, nanoparticles of inorganic materials do not provide a good coverage for human skin because of the agglomeration of the particles. The platy particles are required to enhance the covering ability of inorganic materials. This can be accomplished by synthesis of calcia-doped ceria/mica nanocomposite with subsequent silica coating to control catalytic activity of calcia-doped ceria. Calcia-doped ceria/mica nanocomposite was prepared by soft solution chemical method followed by silica coating via seeded polymerization technique. Silica coated calcia-doped ceria/mica nanocomposite was characterized by X-ray diffraction, SEM, TEM, XPS and FT-IR.

Original languageEnglish
Pages (from-to)5063-5070
Number of pages8
JournalApplied Surface Science
Issue number14
Publication statusPublished - 2006 May 15


  • Calcia doping
  • Ceria
  • Platy particle
  • Silica coating
  • UV shielding

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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