Solar Radiation Catalyzed Aerobic Photooxidation of 1-Naphthol on Some Semiconductors

Authors

  • S. Karuthapandian Department of Chemistry, V.H.N.Senthikumaranadar College, Virudhunagar – 626 001, Tamil Nadu, India
  • K. Arunsunaikumar Department of Chemistry, V.H.N.Senthikumaranadar College, Virudhunagar – 626 001, Tamil Nadu, India

DOI:

https://doi.org/10.51983/ajsat-2014.3.2.794

Keywords:

Solar Radiation, Aerobic, Photooxidation, Semiconductors

Abstract

Phototransformation of 1-naphthol into 1,2-naphthoquinone (1,2-NQ) using photocatalysts; TiO2, V2O5, PbO2, ZnO, Fe2O3, ZnS and Al2O3 has been studied in ethanol in the presence of air, under sunlight. The photooxidation exhibits saturation type kinetics with respect to [1-naphthol] and air. The rate of formation of 1,2- naphthoquinone increases linearly with respect to illumination area. The photooxidation rate is not suppressed by Singlet oxygen quencher, azide ion. Vinyl monomers and sacrificial electron donors do not interfere in photooxidation. The mechanisms of solar photocatalysis on semiconductor and non-semiconductor surfaces have been discussed and a kinetic law deduced. The solar photocatalytic efficiencies of the catalysts follow the  order: Al2O3 > Fe 2O3 > V2O5 > TiO2 > ZnO > PbO2 > ZnS. UV-visible, FT-IR and NMR spectroscopy spectral data clearly  indicate that the photo product is 1,2-NQ.

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Published

05-11-2014

How to Cite

Karuthapandian, S., & Arunsunaikumar, K. (2014). Solar Radiation Catalyzed Aerobic Photooxidation of 1-Naphthol on Some Semiconductors. Asian Journal of Science and Applied Technology, 3(2), 25–32. https://doi.org/10.51983/ajsat-2014.3.2.794