09 خرداد 1403
محمود ناصري

محمود ناصری

مرتبه علمی: دانشیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک-نانو
تلفن: 08132355404
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
Enhanced visible light activity of EuFeO3/ TiO2 nanocomposites prepared by thermal treatment–hydrolysis precipitation method
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
EuFeO3/TiO2 nanocomposites · Thermal treatment/hydrolysis precipitation · Photocatalytic degradation · Congo red
سال
2020
مجله APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
پژوهشگران محمود ناصری

چکیده

The present paper aimed to, through combination of TiO2 and a rare earth ferrite and EuFeO3 nanoparticles, synthesize a new visible light active photocatalyst. The EuFeO3/ TiO2 nanocomposites were synthesized by a thermal treatment approach, in combination with a hydrolysis precipitation processing. The influences of concentration of TiO2 nanoparticles on morphological, magnetic and structural properties of EuFeO3/ TiO2 nanocomposites were examined by different characterization techniques. Moreover, the optical characteristic of the synthesized samples was evaluated by UV–visible diffuse reflectance spectrophotometry. The nanocomposites’ photocatalytic activity was also assessed under the visible light (λ > 400 nm), considering Congo red molecules degradation. Considerable degradation efficiency was observed (68% after 30 min), especially after using EuFeO3/ TiO2 nanocomposites ratio of 1:0.5. The performed analysis revealed that EuFeO3/ TiO2 (1:0.5) nanocomposite could be structured in a way that led to a considerable redshift in the onset of light absorption in comparison with that of pure TiO2. The constructed EuFeO3– TiO2 heterojunction caused a considerable increase in the photocatalytic degradation of the target pollutant, as a result of occurred diminished in electron–hole recombination.