Publication Date:
2011-04-20
Description:
A new type of photodegradable poly(vinyl chloride)-bismuth oxyiodide/TiO 2 (PVC-BiOI/TiO 2 ) nanocomposite film was prepared by embedding a nano-TiO 2 photocatalyst modified by BiOI into the commercial PVC plastic. The solid-phase photocatalytic degradation behavior of the as-prepared film was investigated in ambient air at room temperature under UV light irradiation, with the aid of UV-Vis spectroscopy, weight loss monitoring, scanning electron microscopy, and FT-IR spectroscopy. Compared to the PVC-TiO 2 nanocomposite film, the PVC-BiOI nanocomposite film and the pure PVC film, the PVC-BiOI/TiO 2 nanocomposite film exhibited a higher photocatalytic degradation activity. The optimal mass ratio of BiOI to TiO 2 was found to be 0.75 %. The weight loss rate of the PVC-BiOI/TiO 2 nanocomposite film reached 30.8 % after 336 h of irradiation, which is 1.5 times higher than that of the PVC-TiO 2 nanocomposite film under identical conditions. The solid-phase photocatalytic degradation mechanism of the nanocomposite films was briefly discussed. A new type of photodegradable PVC-BiOI/TiO 2 nanocomposite film was prepared. In comparison with the PVC-TiO 2 nanocomposite film, the PVC-BiOI nanocomposite film and the pure PVC film, the PVC-BiOI/TiO 2 nanocomposite film exhibited a higher solid-phase photocatalytic degradation activity.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
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