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  • Title: Synergetic catalytic performance of TiO2/MCM-41 for ozone-assisted photocatalytic degradation of gaseous acetaldehyde.
    Author: Huang X, Shi W, Yuan J, Shi J, Jiang Z, Shangguan W.
    Journal: Environ Technol; 2011; 32(3-4):307-16. PubMed ID: 21780699.
    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.
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