Dense silica coating of titania nanoparticles by seeded polymerization technique

Ahmed Mohamed El-Toni, Shu Yin, Tsugio Sato

研究成果: Article査読

11 被引用数 (Scopus)

抄録

Titania is of potential interest as an ultraviolet (UV) radiation blocking material in personal care products because of its excellent UV light absorption property. Its high photocatalytic activity, however, facilitates the generation of reactive oxygen species, which can oxidize and degrade other ingredients during its formulation, raising safety concerns. Coating of titania nanoparticles with a silica layer could help in depression of their photocatalytic activity by disturbing the formation of radicals produced by the reaction of oxygen and/or water with the electron-hole pair. Titania nanoparticles were coated with amorphous silica using a seeded polymerization technique. The silica shell was confirmed by TEM, electron probe microanalysis (EPMA), and FT-IR. The photocatalytic activity was evaluated for the coated powder to investigate the efficiency of silica coating as well.

本文言語English
ページ(範囲)229-233
ページ数5
ジャーナルColloids and Surfaces A: Physicochemical and Engineering Aspects
274
1-3
DOI
出版ステータスPublished - 2006 2 15

ASJC Scopus subject areas

  • 表面および界面
  • 物理化学および理論化学
  • コロイド化学および表面化学

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