Visible light photodegradation of organic compounds over V2O5/MgF2 catalyst

被引：29

作者：

Chen, Fei ^{[1
,2
]}

Wang, Jie ^{[1
]}

Xu, Jeff Q. ^{[2
]}

Zhou, Xiao P. ^{[1
,2
]}

机构：

[1] Zhejiang Normal Univ, Inst Phys Chem, Jinhua 321004, Peoples R China

[2] Microvast Inc, Stafford, TX 77477 USA

来源：

APPLIED CATALYSIS A-GENERAL | 2008年 / 348卷 / 01期

关键词：

photodegradation; metal oxyfluoride catalyst; vanadium oxide; photodegradation catalyst;

D O I：

10.1016/j.apcata.2008.06.018

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：54 / 59

页数：6

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