مريم اريازاده

Abstract: In this report, a thin film TiO2-SiO2 is made by the sol-gel process of tetraanobutyl ortho-titanate (TBT) and tetraethyl ortho-silicate (TEOS) as a precursor. TiO2-SiO2 films were coated on a glass substrate using a dip coater layer at a speed of 1-5 mm / min and calcined for 1 hour at 400 ° C. Then, sulfur on the glass surface was embedded in titanium dioxide-silicon dioxide nanocomposite, similar to the previous step, and in the last step porphyrin was similarly added to the surface. Further, catalytic degradation of optical at each stage of the preparation of the compound for rhodambic colorimetric contamination was investigated. The relationship between hydrophilicity and optical catalytic properties that lead to self-healing properties was investigated by adding different SiO2 values to TiO2 films and UV and visible radiation. It was found that adding less than 5% molar SiO2 had the greatest impact on the water contact angle an‎d showed the highest degree of catalytic and hydrophilic activity and ultimately self-healing in comparison to TiO2 films alone, adding sulfur to these effects, but adding porphyrin improved the catalytic properties, but reduced the hydrophilicity. UV-Vis showed that the absorption edge of optical catalysts consists of the only phase of anatase TiO2 to the visible light region. The addition of SiO2 increases the surface area and increases the acidity, which results in an increase in the hydroxyl content of the surface, meaning that the catalytic activity of the optical and the hydrophilic increases and therefore increases the self-cleaning effect. FT-IR, SEM, XRD and DRS methods have been used to identify the compounds.