ZnO-Photocatalyzed Oxidative Transformation of Diphenylamine. Synergism by TiO2, V2O5, CeO2 and ZnS
DOI:
https://doi.org/10.29356/jmcs.v59i2.23Keywords:
Photocatalysis, Semiconductor, Kinetic law, Interparticle charge transfer, N-phenyl-p-benzoquinonimineAbstract
Diphenylamine (DPA) undergoes photocatalytic transformation on nanoparticulate ZnO surface yielding N-phenyl-p-benzoquinonimine (PBQ). The reaction rate increases with the increase of (i) DPA-concentration, (ii) ZnO-loading, (iii) airflow rate and (iv) light intensity. The formation of PBQ is larger on using UV-C light instead of UV-A light. The photocatalyst is reusable. The mechanism of the photocatalytic transformation has been discussed with a suitable kinetic law. Nanoparticulate TiO2, V2O5, CeO2 and ZnS enhance the ZnO-photocatalyzed PBQ formation indicating interparticle charge transfer in semiconductor mixtures.Downloads
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