[Photocatalytic degradation of ethylene over titania-based photocatalysts].
The photocatalytic degradation of ethylene over titania-based photocatalysts was studied under a non-circulating system using visible or near-UV light. The roles of the reaction temperature and the inlet concentration of ethylene and the influence of different light source were investigated. Then the efficiency of noble metals-doped photocatalyst was compared with that of the bare one. The experiment results indicated that when the inlet concentration was in range of 38-188 mg/m3 the photo-degradation efficiency of the bare photocatalyst dropped linearly and very slowly with the increase of inlet concentration of ethylene; the degradation efficiency increased as raising the reaction temperature; noble metals not only decreased the recombination of electron-hole pairs, but also increased the absorption for visible light, leading to the photocatalytic efficiency in several-tens times higher in visible light.
Lin
Lan-yu
LY
Research Center for Eco-Environmental Sciences,CAS, Beijing 100085, China.
Hu
Chun
C
Wang
Zhen-yu
ZY
Hao
Zheng-ping
ZP
D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000517:prevention & control*; D002384:Catalysis; D005030:Ethylenes / Q000737:chemistry*; D010084:Oxidation-Reduction; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
D000393:Air Pollutants; D005030:Ethylenes; C009495:titanium dioxide; C036216:ethylene; D014025:Titanium