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[求助] F离子改性的TiO2是酸性催化剂吗???

请教:用F离子表面修饰的TiO2,其表面酸性增强,由于其对极性有机物的吸附能力而使得催化性能提高。能说其是固体酸性催化剂么??
如下为文章引文:
It was reported that a catalysts with an acidic surface can easily adsorb polarized organic reactants, and thus promote their photocatalytic decomposition
文章题目:
Fluorine-doped TiO 2 powders prepared by spray pyrolysis and their improved photocatalytic activity for decomposition of gas-phase acetaldehyde
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