Premium
Photocatalytic degradation of gaseous trichloroethene using immobilized ZnO/SnO 2 coupled oxide in a flow‐through photocatalytic reactor
Author(s) -
An Taicheng,
Zhang Maolin,
Wang Xinming,
Sheng Guoying,
Fu Jiamo
Publication year - 2005
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1187
Subject(s) - photocatalysis , degradation (telecommunications) , relative humidity , oxide , chemistry , chemical engineering , humidity , environmental chemistry , catalysis , materials science , photochemistry , inorganic chemistry , organic chemistry , telecommunications , physics , computer science , engineering , thermodynamics
Abstract The photocatalytic degradation of gaseous trichloroethene (TCE) was investigated on immobilized ZnO/SnO 2 coupled oxide in a flow‐through photocatalytic reactor. It was found that gaseous photocatalysis is an efficient method for volatile organic compounds' abatement and air purification. Degradation of ∼100% was found for TCE at the concentrations examined, up to 400 ppmv, in a flow‐through dry synthetic gas stream. In our tested conditions, the flow rate had little influence on the photocatalytic degradation efficiencies of TCE, while the relative humidity had a significant influence on the photocatalytic degradation of TCE. The photocatalytic degradation efficiencies of TCE increased slowly below 20% relative humidity and then decreased as the relative humidity increased further. The deactivation of used immobilized photocatalyst was not observed within the 200 h testing period in the present experiment, although the surface of the photocatalyst changed greatly during the use of the photocatalyst. Copyright © 2004 Society of Chemical Industry