title: Synergetic catalytic performance of TiO2/MCM-41 for ozone-assisted photocatalytic degradation of gaseous acetaldehyde.
abstract: This paper presents the preparation and characterization of TiO2/MCM-41 catalysts with different amounts of TiO2 loading or calcination at various temperatures. The activities of the samples were investigated under UV, ozone and UV-zone by the comparison of acetaldehyde degradation. The results showed that the application of photocatalytic ozonation (UV-ozone) produced the highest efficiency for acetaldehyde removal, indicating that a synergistic effect occurred when photocatalysis and ozonation are carried out simultaneously. The synergistic catalytic performance depended significantly on the composition of catalysts used. The TiO2/MCM-41 catalysts were superior to single TiO2 and MCM-41 with respect to the ozone-assisted photocatalytic oxidation of gaseous acetaldehyde, and the activity of the catalyst TiO2/MCM-41, with TiO2:MCM-41 = 5:10, is the highest one among these prepared catalysts. The improvement was attributed to the synergetic effect between adsorption, ozonation and catalytic reaction.
authors.affiliation: Research Centre for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.
authors.forename: Xin
authors.initials: X
authors.lastname: Huang
authors.forename: Wenjing
authors.initials: W
authors.lastname: Shi
authors.forename: Jian
authors.initials: J
authors.lastname: Yuan
authors.forename: Jianwei
authors.initials: J
authors.lastname: Shi
authors.forename: Zhi
authors.initials: Z
authors.lastname: Jiang
authors.forename: Wenfeng
authors.initials: W
authors.lastname: Shangguan
mesh_terms: D000079:Acetaldehyde / Q000737:chemistry*; D000393:Air Pollutants / Q000737:chemistry*; D002384:Catalysis; D010126:Ozone / Q000737:chemistry*; D055668:Photochemical Processes; D012822:Silicon Dioxide / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014025:Titanium / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; C509968:MCM-41; C009495:titanium dioxide; D010126:Ozone; D012822:Silicon Dioxide; D014025:Titanium; D000079:Acetaldehyde