Usefulness of alkoxyltitanosiloxane for the preparation of mesoporous silica containing a large amount of isolated titanium

Kwang Min Choi, Ryutaro Wakabayashi, Takashi Tatsumi, Toshiyuki Yokoi, Kazuyuki Kuroda*

*この研究の対応する著者

研究成果: Article査読

14 被引用数 (Scopus)

抄録

Mesoporous silica containing a large amount of isolated Ti was prepared from an alkoxytitanosiloxane precursor through a hard template method. Isopropoxytris(tris-tert-butoxysiloxy)titanium ((iPrO)Ti[OSi(OtBu)3]3, TS3) was synthesized and TS3 was mixed with mesoporous carbon (CMK-3), a hard template. The mixture was pyrolyzed at 180°C to form a composite consisting of titanosilica and the hard template. After calcination at 600°C for the removal of the carbon template, the titanium species were not transformed to anatase TiO2, proved by DR-UV-Vis, FTIR, XPS, and XRD, while the ESR results indicated the presence of isolated Ti. The mesoporous structure was verified by SEM, TEM, and N2 adsorption. The Si/Ti ratio of the product was consistent with that of the precursor. All the results show that the material prepared from the precursor is ordered mesoporous silica containing a large amount of isolated Ti in the frameworks. The use of well-defined alkoxytitanosiloxane precursor leads to the formation of mesoporous silica with exactly controlled composition of titanium with neither loss of Ti nor transformation to anatase.

本文言語English
ページ(範囲)240-247
ページ数8
ジャーナルJournal of Colloid And Interface Science
359
1
DOI
出版ステータスPublished - 2011 7 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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