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Effects of Silver on the Photocatalytic Degradation of Gaseous Isopropanol

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Abstract

The decomposition of gaseous isopropanol (IPA) by UV/TiO2 process in an annular photoreactor was studied under various conditions such as UV light intensity and inlet IPA concentrations. In order to impede the rapid electron/hole recombination during photoreaction, the Ag deposited on TiO2 photocatalysts were prepared by a photodeposition process. This study was aimed at applying the photocatalytic oxidation using the Ag/TiO2 and pure TiO2 catalysts to remove gaseous IPA. The PL analyses indicated that the silver on the surface of TiO2 could inhibit the electron/holes recombination. For experiments conducted with gaseous IPA under UV light irradiation, the photocatalytic activity of Ag deposited TiO2 surface was significantly superior to that of TiO2 only ones.

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Acknowledgements

This research was supported by Grant NSC-93-2211-E011-001 from the National Science Council, Taiwan, Republic of China

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Correspondence to Young Ku.

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Ma, C., Ku, Y., Kuo, Y. et al. Effects of Silver on the Photocatalytic Degradation of Gaseous Isopropanol. Water Air Soil Pollut 197, 313–321 (2009). https://doi.org/10.1007/s11270-008-9813-x

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Keywords

  • Photocatalysis
  • Silver
  • Titanium dioxide
  • Isopropanol