Abstract
The photodegradation and by-products of the gaseous toluene with (P25) and short-wavelength UV () radiation were studied. The toluene was decomposed and mineralized efficiently owed to the synergistic effect of photochemical oxidation in the gas phase and photocatalytic oxidation on the surface. The toluene by the photoirradiated were mainly mineralized and CO, but some water-soluble organic intermediates were also formed under severe reaction conditions. The ozone and secondary organic aerosol were produced as undesirable by-products. It was found that wet scrubber was useful as post-treatment to remove water-soluble organic intermediates. Excess ozone could be easily removed by means of a ozone-decomposition catalyst. It was also observed that the catalyst could decompose organic compounds by using oxygen reactive species formed in process of ozone decomposition.
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