Efficiency evaluation of different TiO 2 coatings on the photocatalytic inactivation of airborne bacterial spores
- Zacarias, Silvia Mercedes
- Satuf, María Lucila
- Vaccari, Maria Celia
- Alfano, Orlando Mario
DOIAbstract
The performance of different TiO 2 coatings is compared for the photocatalytic inactivation of dry Bacillus subtilis spores dispersed on TiO 2 films under UV-A radiation. Three different TiO 2 coatings were assayed: Degussa P-25, sol-gel, and composite sol-gel/Degussa P-25. The influence of the increase in the number of TiO 2 layers was also studied. Furthermore, the amount of TiO 2 deposited on the borosilicate glass plates and the fraction of energy effectively absorbed by the catalytic films were determined. Spectral diffuse transmittance and reflectance measurements were performed using a spectroradiometer with an integrating-sphere attachment. The net-radiation method was then applied to evaluate the fraction of energy absorbed by the ...
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