Phenol gets adsorbed on Al2O3 and mineralizes under UV light in the presence of dissolved O2. The degradation exhibits first-order kinetics and its rate increases linearly with the light intensity and decreases with pH. 2,4-Diphenoxycyclohexanone and 2,6-diphenoxycyclohex-3-ene-1-ol are the intermediates of the reaction. While particulate TiO2, ZnO, ZnS, Fe2O3, CuO, CdO, and Nb2O5 individually photocatalyze the degradation, each semiconductor exhibits synergistic photocatalysis, an enhanced photodegradation, when present along with Al2O3, indicating electron abstraction by illuminated semiconductors from the phenol adsorbed on Al2O3.
Research on Chemical Intermediates – Springer Journals
Published: Jun 12, 2010
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