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首页> 外文期刊>Journal of Microencapsulation: Microcapsules Liposomes Nanoparticles Microcells Microspheres >Photocatalytic activity of TiO_2 particulate films prepared by depositing TiO_2 particles with various aizes
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Photocatalytic activity of TiO_2 particulate films prepared by depositing TiO_2 particles with various aizes

机译：各种粒径沉积TiO_2颗粒制备的TiO_2颗粒膜的光催化活性

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摘要

TiO2 particles of various sizes were prepared by grinding in cyclohexanone, and TiO2 particulate films were obtained by depositing these TiO2 particles with various sizes onto a glass or quartz substrate. The effect of the particle size andoil thickness on the photocatalytic properties of the films was evaluated via ~ect oxidative degradation of gaseous 2-propanol. The initial rate of 2-propanol 104, degradation under UV light irradiation for the films deposited with 30nm TiO2 particles increased with increasing film thickness up to 600 nm, and reached a VI saturated value above this film thickness. Photocatalytic activity for the films of with thickness below 600 nm was larger when smaller TiO2 particles were deposited onto the substrate, due to the increase in the surface area of the particulate films. Furthermore, saturated values of the photocatalytic activityfor thick films were smaller for the films deposited with smaller particles, which is mainly attributed to the change in crystal form of the particles during the grinding treatment.
机译：通过在环己酮中研磨来制备各种尺寸的TiO 2颗粒，并且通过将这些各种尺寸的TiO 2颗粒沉积在玻璃或石英基板上来获得TiO 2颗粒膜。通过气态2-丙醇的氧化降解评价了粒径和油厚度对薄膜光催化性能的影响。 2-丙醇104的初始速率，即在沉积有30​​nm TiO2颗粒的薄膜的紫外线照射下的降解，随着薄膜厚度的增加而增加，直至600nm，并达到该薄膜厚度以上的VI饱和值。当较小的TiO2颗粒沉积到基材上时，由于颗粒膜表面积的增加，厚度小于600 nm的膜的光催化活性更大。此外，对于沉积有较小颗粒的膜，厚膜的光催化活性的饱和值较小，这主要归因于研磨处理期间颗粒的晶体形式的变化。

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