Characterization of self-standing Ti-containing porous silica thin films and their reactivity for the photocatalytic reduction of CO2 with H2O

Keita Ikeue, Shinjiro Nozaki, Makoto Ogawa, Masakazu Anpo*

*この研究の対応する著者

研究成果: Article査読

108 被引用数 (Scopus)

抄録

Self-standing porous silica thin films with different pore structures were synthesized by a solvent evaporation method and used as photocatalysts for the photocatalytic reduction of CO2 with H2O at 323 K. UV irradiation of these Ti-containing porous silica thin films in the presence of CO2 and H2O led to the formation of CH4 and CH3OH as well as CO and O2 as minor products. Such thin films having hexagonal pore structure exhibited higher photocatalytic reactivity than the Ti-MCM-41 powder catalyst even with the same pore structure. From FTIR investigations, it was found that these Ti-containing porous silica thin films had different concentrations of surface OH groups and showed different adsorption properties for the H2O molecules toward the catalyst surface. Furthermore, the concentration of the surface OH groups was found to play a role in the selectivity for the formation of CH3OH.

本文言語English
ページ(範囲)241-248
ページ数8
ジャーナルCatalysis Today
74
3-4
DOI
出版ステータスPublished - 2002 6 5

ASJC Scopus subject areas

  • 触媒
  • プロセス化学およびプロセス工学

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