Synthesis and characterization of polyvinyl pyrrolidone (PVP)-coated Fe3O4 nanoparticles by chemical co-precipitation method and removal of Congo red dye by adsorption process

The present paper deals synthesis of polyvinyl pyrrolidone (PVP)-coated magnetite nanoparticles by chemical co-precipitation method. The samples were characterized using X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR) and Brunauer–Emmett–Teller (BET) methods. The surface area, pore volume and pore radius were calculated by the BET analysis. The EDX and FT-IR analysis demonstrated the fabrication of PVP-coated Fe3O4 NPs. The as-synthesized Fe3O4/PVP has successfully been used as an adsorbent for elimination of Congo red dye in aqueous medium.