Effects of mordenite support on photodegradation of gaseous organic compounds over TiO2 photocatalyst

Article abstract of DOI:10.1246/bcsj.72.1615

Effects of mordenite as a support material for TiO₂ on photodegradation rates of gaseous propionaldehyde, acetone, and propane were investigated using TiO₂ (50 wt%)-loaded mordenite as a photocatalyst in reference to unsupported TiO₂. The supported photocatalyst allowed adsorption of all the substrates several times greater than the unsupported photocatalyst, resulting in higher photooxidation rates for them. Detailed analysis suggests that the enhancement of the decomposition rate caused by the use of mordenite support is more remarkable for lower amounts of adsorption of the substrates on the support. The concentration of oxygen was found to have little influence on the photodegradation rates, suggesting that the rate of degradation of the organic substrates was not decided by photogenerated electron transfer processes but by the consumption of photogenerated holes by adsorbed organic substrates.