Novel hybrid Sr-doped TiO2/magnetic Ni0.6Zn0.4Fe2O4 for enhanced separation and photodegradation of organics under visible light

摘要: Titanium dioxide (TiO2) has been intensively used as a photocatalyst for the degradation of organic pollutants in water, but is typically obstacle by low efficiency, costly separation, limited visible light response, and poor recyclability. Herein, we provided reliable method to simultaneously tackle these four obstacles developing an integrated multifunctional hybrid photocatalyst/magnetic material, i.e., Sr–TiO2/Ni0.6Zn0.4Fe2O4. This novel not only demonstrated high efficiency (90–100%) good cycling performance (90% maintenance) photodegradation bisphenol A (BPA) under both UV irradiation, it can also efficiently work at wide pH range (4–10) be easily separated from water reuse introducing external magnetic field. The materials structure-to-activity correlation investigated. It was found that doping Sr2+ coupling material with TiO2 could extend response create active defects TiO2, which were responsible nearly three times higher activity than commercial TiO2(P25) light. On other hand, excessive lowered surface area, enlarged crystalline size caused particle aggregation; thus, leading decrease photocatalytic hybrid. These further modifications provide competitive alternative control waste water.