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Photocatalytic reduction of CO2with H2O on Ti-MCM-41 and Ti-MCM-48 mesoporous zeolite catalysts

Authors
Journal
Catalysis Today
0920-5861
Publisher
Elsevier
Publication Date
Volume
44
Identifiers
DOI: 10.1016/s0920-5861(98)00206-5
Keywords
  • Photocatalytic Reduction Of Co2With H2O
  • Ti-Mesoporous Zeolite
  • Ti-Mcm-48
  • Ti-Mcm-41
  • Selective Ch3Oh Formation
Disciplines
  • Earth Science
  • Geography

Abstract

Abstract Titanium oxide species included within the framework of mesoporous zeolites (Ti-MCM-41 and Ti-MCM-48) prepared by a hydrothermal synthesis exhibited high and unique photocatalytic reactivity for the reduction of CO 2 with H 2O at 328 K to produce CH 4 and CH 3OH in the gas phase. In situ photoluminescence, diffuse reflectance absorption, ESR and XAFS investigations indicated that the titanium oxide species are highly dispersed within the zeolite framework and exist in tetrahedral coordination. The charge transfer excited state of the highly dispersed titanium oxide species played a significant role in the reduction of CO 2 with H 2O exhibiting a high selectivity for the formation of CH 3OH.

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