| Summary: | 碩士 === 國立陽明大學 === 環境與職業衛生研究所 === 101 === Instead of antifungal efficiency, most of these studies focused on the bactericidal effectiveness. Since the fungi, especially their spores, are comparatively more resistant than bacteria. In this study, we assessed antifungal effects of the nano-metals (Ag, Cu and Ni) loaded titanium dioxide (TiO2) on Aspergillus niger spore.
The antifungal experiments were conducted under four situations: in the darkness (Dark), illuminated with ultraviolet lamp (UV), exposure to 5 ppm of ozone (O3), exposure to 5-ppm ozone and illuminated with ultraviolet lamp simultaneously (UV+O3).In the case of Dark, the antifungal effect of the 0.5wt% nano-Ag loaded TiO2 was better than that of 2wt% nano-Cu and 5wt% nano-Ni loaded ones. In the case of UV and O3, the antifungal effects of the quartz chips coated with TiO2 and nano-metals loaded TiO2 were worse than the bare chip.
Accordingly, nano-Ag supported TiO2 catalysts were better than nano-Cu supported ones on the inactivation of Aspergillus niger spores However, the nano-Cu could be a low-cost alternative for the inactivation of Aspergillus niger spores, since silver is much more expensive than copper. Overall, the antifungal effect of these four situations on the Aspergillus niger spore is in the order of: UV+O3>UV>O3>Dark.
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