Fabrication of substituted Y-type hexaferrites/carbon dots composites for recording media and photodegradation of dye

The normal micmemulsion approach was employed for the synthesis of SrBaZn2-xMnxFe12-2ySnyNiyO22 (x = 0.0, 0.25, 0.5, 0.75, and 1.0) while the hydrothermal method was used to synthesize the carbon dots (CDs) and their nanocomposite. The structural characteristics, architectures and surface area of the materials are examined by using various techniques. The magnetic features i.e. magnetic remanence (Mr) and saturation magnetization (Ms) increase up to x,y = 0.5 while the coercivity (Hc) decreases which is explained based on-site occupation of substituents and super-exchange interactions. The electrical resistivity of the substituted ferrite materials also increased from 24.62 to 46.76 x 10(6) Omega cm. The increment in saturation magnetization, remanence, and electrical resistivity suggests that ferrite material can be utilized for high-density recording media as well as for microwave devices. The composite materials with composition SrBaZn1.5Mn0.5Fe11Sn0.5Ni0.5O22/CDs with different ratios have been employed as photocatalysts for the degradation of Rhodamine B under sunlight. Rhodamine B (RhB) was effectively degraded by photocatalysts with a low CDs content i.e. 5.0 wt percent. The composite degrades the dye up to 96% in 80 min and also showed excellent stability after five consecutive runs. The composite material can be employed for the removal of environmental pollutants using natural sunlight for future applications.

Automated summary

In this study, a normal micmemulsion approach was used to synthesize SrBaZn2-xMnxFe12-2ySnyNiyO22 and carbon dots nanocomposite, while the hydrothermal method was employed for the synthesization of carbon dots. The materials were characterized by various techniques to examine their structural characteristics, architectures, and surface area. The results showed that the composite materials exhibited enhanced magnetic properties and increased electrical resistivity, making them suitable for high-density recording media and microwave devices. Additionally, the composite materials with low carbon dots content demonstrated excellent photocatalytic performance under sunlight, indicating their potential application for the removal of environmental pollutants.