A comparative study for the synergistic effect of ozone on the γ-irradiated and photocatalytic reaction of 4-Chlorobenzaldehyde (cas 104-88-1)

Add time:08/15/2019    Source:sciencedirect.com

The synergistic effect of ozone on both, the TiO2-mediated photocatalytic and γ-rays induced degradation of 1×10−3 mol dm−3 4-chlorobenzaldehyde (4-ClBzAl) was studied as a function of absorbed energy. The formation of formaldehyde (HCHO), H+ and Cl− ions as well as of carboxylic acid was used to follow the degradation processes. The highest efficiency for the substrate degradation was achieved by the simultaneous action of ozone and photocatalysis on 4-ClBzAl in aqueous solution. On the other hand, the degradation yield of the substrate by ozonation is three times higher compared to the degradation yield observed by γ-rays in the presence of ozone. This yield is however, higher than that obtained by γ-radiolysis in the presence of air. Benzoic, 4-chlorobenzoic, fumaric, glyoxylic, mucconic, and oxalic acids were formed as common final reaction products in each degradation process.

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