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

Research output: Contribution to journalArticle

101 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)241-248
Number of pages8
JournalCatalysis Today
Volume74
Issue number3-4
DOIs
Publication statusPublished - 2002 Jun 5

Fingerprint

Silicon Dioxide
Pore structure
Silica
Thin films
Catalysts
Multicarrier modulation
Carbon Monoxide
Photocatalysts
Powders
Evaporation
Irradiation
Adsorption
Molecules

Keywords

  • CHOH
  • Photocatalyst
  • Porous thin film
  • Reduction of CO
  • Ti-oxide

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Characterization of self-standing Ti-containing porous silica thin films and their reactivity for the photocatalytic reduction of CO2 with H2O. / Ikeue, Keita; Nozaki, Shinjiro; Ogawa, Makoto; Anpo, Masakazu.

In: Catalysis Today, Vol. 74, No. 3-4, 05.06.2002, p. 241-248.

Research output: Contribution to journalArticle

Ikeue, Keita ; Nozaki, Shinjiro ; Ogawa, Makoto ; Anpo, Masakazu. / Characterization of self-standing Ti-containing porous silica thin films and their reactivity for the photocatalytic reduction of CO2 with H2O. In: Catalysis Today. 2002 ; Vol. 74, No. 3-4. pp. 241-248.
@article{a2a66f92283c46328f27ab60c0f3944f,
title = "Characterization of self-standing Ti-containing porous silica thin films and their reactivity for the photocatalytic reduction of CO2 with H2O",
abstract = "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.",
keywords = "CHOH, Photocatalyst, Porous thin film, Reduction of CO, Ti-oxide",
author = "Keita Ikeue and Shinjiro Nozaki and Makoto Ogawa and Masakazu Anpo",
year = "2002",
month = "6",
day = "5",
doi = "10.1016/S0920-5861(02)00027-5",
language = "English",
volume = "74",
pages = "241--248",
journal = "Catalysis Today",
issn = "0920-5861",
publisher = "Elsevier",
number = "3-4",

}

TY - JOUR

T1 - Characterization of self-standing Ti-containing porous silica thin films and their reactivity for the photocatalytic reduction of CO2 with H2O

AU - Ikeue, Keita

AU - Nozaki, Shinjiro

AU - Ogawa, Makoto

AU - Anpo, Masakazu

PY - 2002/6/5

Y1 - 2002/6/5

N2 - 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.

AB - 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.

KW - CHOH

KW - Photocatalyst

KW - Porous thin film

KW - Reduction of CO

KW - Ti-oxide

UR - http://www.scopus.com/inward/record.url?scp=0037024240&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037024240&partnerID=8YFLogxK

U2 - 10.1016/S0920-5861(02)00027-5

DO - 10.1016/S0920-5861(02)00027-5

M3 - Article

VL - 74

SP - 241

EP - 248

JO - Catalysis Today

JF - Catalysis Today

SN - 0920-5861

IS - 3-4

ER -