Ozone-assisted photocatalytic oxidation of gaseous acetaldehyde on TiO2/H-ZSM-5 catalysts.
TiO(2)/H-ZSM-5 catalysts were prepared by impregnation with different amount of TiO(2) loading and calcination at various temperatures. The catalysts were characterized by X-ray diffraction (XRD), ultraviolet and visible spectroscopy (UV-vis) and BET specific surface area. It was demonstrated that the anatase TiO(2) retained stable on H-ZSM-5 after heat treatment even at 700 degrees C. The activities of samples were investigated under the various conditions of UV, ozone and UV-ozone, respectively by the comparison of acetaldehyde degradation. It was found that the photocatalysis combined with ozonation promoted the acetaldehyde degradation. TiO(2)/H-ZSM-5 catalysts were superior to simple TiO(2) and H-ZSM-5 with respect to the ozone-assisted photocatalytic oxidation of gaseous acetaldehyde, and the activity of the catalyst TiO(2)/H-ZSM-5 (TiO(2):H-ZSM-5=2:10) is the highest one among all those prepared samples. The improvement was attributed to the synergetic effect among adsorption, ozonation and catalytic reaction.
Huang
Xin
X
Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Yuan
Jian
J
Shi
Jianwei
J
Shangguan
Wenfeng
W
D000079:Acetaldehyde / Q000737:chemistry; D000327:Adsorption; D000447:Aldehydes / Q000737:chemistry; D002384:Catalysis; D004867:Equipment Design; D005740:Gases; D010100:Oxygen / Q000737:chemistry*; D010126:Ozone; D010777:Photochemistry / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods; D013696:Temperature; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
D000447:Aldehydes; D005740:Gases; C009495:titanium dioxide; D010126:Ozone; D014025:Titanium; D000079:Acetaldehyde; D010100:Oxygen