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首页> 外文期刊>Science and Technology of Advanced Materials >Sol-gel preparation and properties study of TiO_2 thin film for photocatalytic reduction of chromium(VI) in photocatalysis process
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Sol-gel preparation and properties study of TiO_2 thin film for photocatalytic reduction of chromium(VI) in photocatalysis process

机译：光催化过程中光催化还原六价铬的TiO_2薄膜的溶胶-凝胶制备及性能研究

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In this paper, a sol-gel technique with dip coating method is used to prepare photocatalytic TiO_2 thin films immobilized on glass plates. The structure and morphology of thin films are characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The structural characterization of this film shows that the titanium oxide anatase phase is predominant at 400-700℃. The appearance of the rutile phase depends mainly on the number of coating cycles. For example, the rutile phase appeared at 600℃ with 5 coating cycles, however, it disappeared from TiO_2 crystalline after 8 coating cycles. The obtained thin films from each preparation condition were employed in experiment of photoreduction of chromium. The results show that the Chromium(VI) is successfully removed from aqueous in photocatalysis system using the obtained thin film with high portions of anatase phase. The photoactivity of the prepared TiO_2 thin films exhibits a comparable efficiency with TiO_2 powder, Degussa P-25.
机译：本文采用溶胶-凝胶法和浸涂法制备了固定在玻璃板上的光催化TiO_2薄膜。薄膜的结构和形貌通过X射线衍射（XRD）和扫描电子显微镜（SEM）表征。该膜的结构表征表明，在400-700℃下，钛氧化物锐钛矿相占优势。金红石相的出现主要取决于涂覆循环的次数。例如，金红石相在600℃下出现了5个涂覆周期，但在8个涂覆周期后从TiO_2晶体中消失了。从每种制备条件获得的薄膜用于铬的光还原实验。结果表明，使用获得的具有高锐钛矿相比例的薄膜，在光催化系统中成功地从水中去除了铬（VI）。制备的TiO_2薄膜的光活性显示出与TiO_2粉末Degussa P-25相当的效率。

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