V₂O₅-Photocatalyzed Oxidation of Diphenylamine

Abstract:

V₂O₅ catalyzes the oxidation of diphenylamine (DPA) to N-phenyl-p-benzoquinonimine (PBQ) in ethanol under UV light as well as under natural sunlight. The formation of PBQ was studied as a function of [DPA], V₂O₅-loading, airflow rate, light intensity, etc. Formation of PBQ is larger on illumination at 254 nm than at 365 nm and the catalyst is reusable. The mechanism of photocatalysis is discussed and the product formation analyzed using a kinetic model. ZnO and CdO enhance the V₂O₅-photocatalyzed formation of PBQ and the results are rationalized.

• Periodical: Materials Science Forum (Volume 807)
• Pages: 81-90
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.807.81
• Online since: November 2014
• Authors: C. Karunakaran, S. Karuthapandian
• Keywords: Interparticle Charge Transfer, Organic Transformation, Photooxidation, Solar Photocatalysis

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