TiO₂ films with exposed {001} facets and uniform Pt nanoparticles on the crystal facets were fabricated on a Ti substrate using a simple low temperature electrostatic self-assembly method. Proper Pt colloidal pH value was selected by determining ξ potential of Pt NPs and TiO₂ film with exposed {001} facets. Ultra high-resolution FESEM observation shows that Pt NPs with diameter of 2-4nm were physically separated and dispersed on TiO₂ facets. The Pt NPs were found to be apt to deposit on the {101} facet with more positive surface potential of TiO₂ film and the mean size and the number density of Pt NPs on different facet could be rationally tailored by controlling immersion time of TiO₂ film with exposed {001} facets. The Pt-TiO₂ film with exposed {001} facets prepared at immersion time of 5min shows considerably higher UV photocatalytic activity than TiO₂ film with exposed{001} facets and single UV irradiation for all the experimented initial ethenzamide concentrations, and also no deactivation was observed during 3 recyling runs. The UV photocatalysis employing Pt-TiO₂ film with exposed {001} facets as photocatalyst shows significant potential for application in degradation of pharmaceutical and personal care products (PPCPs) with amide bonds.

中文翻译：

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铂沉积的TiO2薄膜具有暴露的{001}面，用于光催化降解药物污染物

使用简单的低温静电自组装方法，在Ti基片上制备了具有暴露的{001}面和均匀的Pt纳米粒子的TiO ₂薄膜。通过确定暴露的{001}面的Pt NPs和TiO ₂膜的ξ电位，选择合适的Pt胶体pH值。超高分辨率FESEM观察表明，直径为2-4nm的Pt NPs物理分离并分散在TiO ₂面上。发现Pt NPs易于沉积在TiO ₂膜的正表面电势更大的{101}面上，并且可以通过控制TiO _2的浸没时间来合理地调整Pt NPs在不同面上的平均尺寸和数量密度。裸露的{001}小面的胶片。在所有实验的初始乙酰胺浓度下，在浸没时间为5min时制备的具有暴露的{001}面的Pt-TiO ₂膜显示出比具有暴露的{001}面和单一UV照射的TiO ₂膜明显更高的UV光催化活性，并且也没有失活在3个重新整理运行中观察到。使用具有暴露的{001}面的Pt-TiO ₂膜作为光催化剂的UV光催化显示出在降解具有​​酰胺键的药物和个人护理产品（PPCP）方面的巨大潜力。