TiO2-containing papers with highly photocatalytic activity have been prepared. Their photocatalytic activity was investigated by measuring the decomposition of gaseous acetaldehyde under illumination from a weak UV light source such as a conventional white fluorescent light bulb. It was found that the photocatalytic efficiency of the TiO2-containing papers was higher than that of Degussa P-25, one of the most efficient commercial TiO2 powders, indicating that paper pulp serves as a good matrix for highly efficient TiO2 photocatalysts.
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