4.6 Article

Visible light photodegradation of organic compounds over V2O5/MgF2 catalyst

期刊

APPLIED CATALYSIS A-GENERAL
卷 348, 期 1, 页码 54-59

出版社

ELSEVIER
DOI: 10.1016/j.apcata.2008.06.018

关键词

photodegradation; metal oxyfluoride catalyst; vanadium oxide; photodegradation catalyst

资金

  1. Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces of Zhejiang Normal University KYJ01Y05002
  2. R&D department of Microvast, Inc. [l]
  3. Chinese Ministry of Education

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Photodegradation catalysts were prepared by doping MgF2 matrix with V2O5. Since V2O5 has a band-gap of 2.0 eV, it is a potentially visible light excitable semiconductor. However, because of the rapid recombination of electron-hole pairs, pure V2O5 is not active in photodegradation reaction of organic pollutants. The doping of V2O5 into MgF2 matrix retards the recombination of electron-hole pairs in catalysts and makes the catalysts active in visible light. A photon quantum efficiency of 3.2% at 578 nm was obtained over 9.1 mol%VOx/MgF2 for acetone degradation. An even higher photon quantum efficiency of 34.6% at 578 nm was obtained over 0.133%Pt/9.1%VOx/MgF2 (in mol) for acetone degradation. The VOx/MgF2 Catalysts and Pt-doped VOx/MgF2 catalysts were also proved to be active for the photodegradation of methanol, ethanol, and benzene. (C) 2008 Elsevier B.V. All rights reserved.

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