فرزانه رادفر

In recent years, the design of nanomaterials as photocatalysts to convert the endless energy of sunlight into chemical energy has attracted the attention of researchers as a new approach for water purification an‎d removal of environmental pollutants. In this thesis, a novel combination of BiOCl-based photocatalysts an‎d UiO-66-NH₂ metal-organic framework was synthesized for the removal of pollutants from industrial wastewater. In this regard, electrospinning method was used to immobilize these two materials on a polyacrylonitrile (PAN) polymer fiber substrate. The resulting combination created a hybrid structure with improved optical an‎d surface properties that was eva‎luated for the degradation of pollutants under visible light irradiation. The prepared sample was characterized an‎d analyzed using various techniques such as XRD, SEM, IR, DRS an‎d UV-Vis. The results indicated effective synergy between BiOCl an‎d UiO-66-NH₂, which led to reduced charge carrier recombination, increased visible light absorption, an‎d improved photocatalytic performance. To eva‎luate the photocatalytic activity, a 10 ppm solution of potassium dichromate with pH=3 was prepared an‎d the reduction process of Cr(VI) to Cr(III) was investigated by loading a 2×2 film for 180 min under visible light irradiation. In this study, the effect of ethylenediaminetetraacetic acid (EDTA) as a hole trap in the reduction of Cr(VI) to Cr(III) was investigated. The results showed that the designed fiber-based structure had a significant efficiency in the removal of Cr(VI). Finally, this proposed fiber-based structure can be introduced as an efficient an‎d stable photocatalyst for the treatment of industrial wastewater an‎d the reduction of hazardous pollutants.

كاتاليزگر نوري , تصيفيه آب , تخريب آلاينده‌ها‌ي معدني , نور مرئي , چارچوب فلز-آلي (MOF) , الكتروريسي , پلي آكريلونيتريل (PAN) , كاهش كروم(VI)

Photocatalysis , water purification , degradation of inorganic pollutants , visible light , Metal-Organic Framework (MOF) , Electrospinning , polyacrylonitrile (PAN) , Chromium(VI) reduction

Vahid Safarifard an‎d Mahboobeh Rabbani

Vahid Safarifard an‎d Mahboobeh Rabbani