مبين بابازاده

Industrial wastewater of the textile industry, particularly dyes, has become a significant environmental challenge in developing contries, where treatment processes face considerable difficulties. These dyes are not effectively removable through conventional methods due to their complex structures and low degradability. Photocatalysts, especially titanium dioxide (TiO₂), have emerged as efficient solutions for the degradation of dyes and pollutants in water and air. TiO₂ is widely applied in water treatment and renewable energy systems due to its high photocatalytic activity, stability, and safety. Furthermore, graphene oxide (GO), as a nanomaterial with high adsorption properties, enhances the efficiency of water treatment systems. This study investigates TiO₂ nanoparticles and the TiO₂@GO hybrid with the aim of optimizing their photocatalytic properties. Initially, GO was synthecised by modified Hammer method. Thereafter, TiO2 was coated on GO using sol-gel method. The TiO₂ and TiO₂@GO was assessed for optimal calcination temperatures. The anatase phase formation was eva‎luated using XRD analysis. A temperature of 550°C was found optimal for the anatase phase formation in pristine TiO2 and 750°C for TiO₂@GO. Based on the FTIR, XRD, UV-Vis DRS, PL, and Raman analyses, coating of TiO2 on GO surface improved the optical and structural properties of the hybrid. These improvements included reduced crystal size, decreased energy band gap, and lower electron-hole recombination rates. FESEM images also confirmed the uniform distribution of TiO₂ on GO sheets and the reduction in particle size in the composites. In the methylene blue degradation experiments, the TiO₂@GO hybrids exhibited superior photocatalytic performances compared to the pristine TiO₂ and GO, achieving over 99% degradation of methylene blue under UV light. The hybrid's enhanced performance is attributed to its reduced energy band gap, increased specific surface area, and improved electron transfer capabilities. These findings demonstrated that the TiO₂@GO hybrid holds great potential for wastewater treatment and pollutant removal applications.

فتوكاتاليست‌ها , دي‌اكسيد تيتانيوم (TiO₂) , گرافن اكسايد , تصفيه آب , تخريب رنگ , متيلن بلو.

Photocatalysts , Titanium dioxide , Graphene oxide , Water treatment , Dye degradation , Methylene blue

mobin babazadeh

Dr. masuod jamshidi