Photocatalytic degradation of rhodamine B using cysteine capped ZnO/P(3HB-co-3HHx) fiber under UV and visible light irradiation

Photocatalytic activity of SnO2/Fe3O4 nanocomposites and the toxicity assessment of Vigna radiata, Artemia salina and Danio rerio in the photodegraded solution

The study was undertaken to design SnO₂/Fe₃O₄ nanocomposite by sonochemical method and to assess the photodegradation of organic dye. Textural, composition and structural features of the bare SnO₂ and SnO₂/Fe₃O₄ samples were characterized using scanning electron microscope (SEM), energy dispersive X-ray (EDX), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The X-ray diffraction of as-synthesized SnO₂/Fe₃O₄ nanocomposites confirms the presence of tetragonal and cubic structure. The results disclose that the incorporation of Fe₃O₄ in SnO₂ decrease the crystallite size and increase the surface area compared with bare SnO₂ nanoparticle. The as-prepared photocatalyst shows higher efficiency than the bare SnO₂ under sunlight irradiation. Vigna radiata seeds (VR), Artemia salina (AS) and Zebra fish (Danio rerio (DR) were used to check the toxicity level of the treated and untreated Rhodamine B (RhB) dye solution. These models displayed good consistency for examining the harmfulness of the solutions. The results suggests SnO₂/Fe₃O₄ nanocomposite exhibited a good efficacy in the dye wastewater treatment. Further, the degradation efficiency was confirmed by the toxicity examination.