Photocatalytic Applications in Gas-Phase Decontamination

Photocatalytic oxidation can be an effective way of removing pollutants in the gas phase, such as NOx, SOx, and volatile organic compounds (VOCs). 

C-doped Ti02 was employed for the photocatalytic removal of NOx. The presence of carbon, in the form of coke-like species, was responsible for visible light absorption and thus for the good activity of the photocatalyst under green light irradiation [133]. 

The removal of H2S in the gas phase was found to proceed with good results when composites of Ti02 and SiMgO materials were employed, owing to the synergic effect of the photocatalytic activity of the former material and the adsorptive properties of the latter for S02 [134]. 

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