[Photo-catalytic degradation of gas phase benzene and toluene over multi-composite TiO2 catalyst].
Photo-catalytic degradation of gas-phase benzene and toluene were studied in the condition of no catalyst, pure anatase catalyst, pure rutile catalyst and multi-composite catalyst. The influences of initial concentration of reactants and the catalysts of different composite on photo-catalytic degradation rate of gas-phase benzene and toluene were investigated. The results show that the degradation efficiency of benzene and toluene is improved a lot on anatase catalyst, but improved a little on rutile catalyst in relation to the crystal-structure of anatase and rutile catalyst. In the condition of no catalyst and pure rutile catalyst, toluene is easier to be degradated than benzene, and on anatase catalyst benzene is easier to be done than toluene. The initial concentration of reactant has an effect on the photo-catalytic degradation process. The degradation rates of benzene and toluene are faster in low concentration than in high concentration. A certain amount of rutile doped in anatase catalyst could improve the photo-catalytic activity. The catalyst with 80% anatase and 20% rutile shows the best photo-catalytic activity to benzene, and the catalyst with 90% anatase and 10% rutile gives the best photo-catalytic activity to toluene.
School of Environmental Science and Engineering, Shandong University, Ji'nan 250100, China. yqyin@sdu.edu.cn
Yong-Quan
YQ
Yin
Yuan-Cheng
YC
Su
Li-Na
LN
You
Xiang
X
Liu
Zhao-Jie
ZJ
Cui
D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control*; D001554:Benzene / Q000737:chemistry*; D002384:Catalysis / Q000528:radiation effects; D010084:Oxidation-Reduction / Q000528:radiation effects; D010777:Photochemistry; D014025:Titanium / Q000737:chemistry*; D014050:Toluene / Q000737:chemistry*; D014835:Volatilization
C009495:titanium dioxide; D014050:Toluene; D014025:Titanium; D001554:Benzene