Titanosilicate Molecular Sieves for Size-Selective Photocatalytic Conversion

• Saito Naoya

  Research Center for Solar Energy Chemistry, Osaka University, Japan

• Shiraishi Yasuhiro

  Research Center for Solar Energy Chemistry, Osaka University, Japan

• Hirai Takayuki

  Research Center for Solar Energy Chemistry, Osaka University, Japan

抄録

Titanosilicate microporous molecular sieves, activated by UV irradiation in the presence of H₂O and molecular oxygen at room temperature, decompose a molecule having a size equivalent to the pore diameter of the catalyst, but are almost inactive for decomposition of a molecule having larger or smaller size. ESR analysis indicated that this size-selective photocatalytic activity is brought about by a combination of shortened lifetime of charge-transfer excited state of tetrahedrally coordinated titanium oxide (TiO₄) species in the presence of H₂O and restricted diffusion of the guest molecule inside the micropore of the catalyst. This observation indicates a potential utility of the titanosilicate molecular sieve as a photocatalyst for selective transformation of organic functional groups, associated with the size reduction of the molecule, so called "molecular shave" type reactions.

収録刊行物

• アジア・太平洋化学工学会議発表論文要旨集

  アジア・太平洋化学工学会議発表論文要旨集 2004 (0), 921-921, 2004

  公益社団法人 化学工学会

キーワード

• Titanosilicate molecular sieve
• Photocatalyst
• Size-selective conversion

詳細情報

• CRID: 1390001205732383872
• NII論文ID: 130005053020
• DOI: 10.11491/apcche.2004.0.921.0
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可