Photochemistry catalyzed by copolymer-templated mesoporous SiO 2: Decomposition of methanol and formic acid

Yi Shiue Lin, Meng Tso Chen, Yu Feng Lin, Yi Shung Pang, Hong Ping Lin, Jong Liang Lin

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Photochemical reactions of methanol and formic acid on L64 copolymer-templated mesoporous SiO2 have been investigated by Fourier transform infrared spectroscopy. Although SiO2 has been generally recognized to be photochemically inert, the reaction pathways HCOOH(a), HCOO(a)/SiO2 →CO2(g) and CH3OH(a), CH3O(a)/ SiO 2 → CH2O(a) → HCOO(a) → CO2(g) are demonstrated. The photons used in this study are unable to promote the SiO2 valance band electrons to the conduction band. Therefore photoholes take no part in these reactions. Mechanisms involving charge transfer and the surface species possible to initiate the photooxidation on mesoporous SiO2 under irradiation are discussed. For comparison purposes, parallel studies are also conducted for nonporous SiO2 to show the effect of porosity of SiO2 on the reactivity.

Original languageEnglish
Pages (from-to)14809-14815
Number of pages7
JournalJournal of Physical Chemistry B
Volume110
Issue number30
DOIs
Publication statusPublished - 2006 Aug 3

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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