کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1554174 | 998773 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The hybrid photocatalyst of TiO2–SiO2 thin film prepared from rice husk silica The hybrid photocatalyst of TiO2–SiO2 thin film prepared from rice husk silica](/preview/png/1554174.png)
The TiO2–SiO2 thin film was prepared by self-assembly method by mixing SiO2 precursor with titanium precursor solution and aged to obtain a co-precipitation of silica and titanium crystals. Dip coating method was applied for thin film preparation on glass slide. The X-ray diffraction (XRD) of the self-assembly thin film had no characteristic property of SiO2 and even anatase TiO2 but indicated new crystal structure which was determined from the Fourier Transform Infrared Spectrophotometer (FTIR) as a hybridized Ti–O–Si bonding. The surface area and surface volume of the self-assembly sample were increased when SiO2 was incorporated into the film. The self-assembly TiO2–SiO2 thin film exhibited the enhanced photocatalytic decolorization of methylene blue (MB) dye. The advantages of SiO2 are; (1) to increase the adsorbability of the film and (2) to provide the hydroxyl radical to promote the photocatalytic reaction. The self-assembly thin film with the optimum molar ratio (SiO2:TiO2) as 20:80 gave the best performance for photocatalytic decolorization of MB dye with the overall efficiency of 81%.
► TiO2 mixed with SiO2 as thin film.
► SiO2 increase efficiency of TiO2.
► Mixed TiO2–SiO2 applied for photocatalytic decolorization of methylene blue (MB).
Journal: Superlattices and Microstructures - Volume 51, Issue 3, March 2012, Pages 343–352