Synthesis, characterization and catalytic sorption activity of various method prepared magnetite (Fe3O4) nanoparticle deposition on porous BiMnOx nanotubes

Magnetite nanoparticle deposited porous Bi-doped MnOx nanocomposite were prepared by two step coprecipitation and deposition process. Surfactant assisted co-precipitation method is adopted to prepare porous Bi-MnOx nanotube followed by Fe3O4 nanoparticle incorporation by ultrasonic assisted deposition method. The role of iodine and EDTA for stabilize the magnetite nanoparticle have been studied. The various method prepared Fe3O4 deposited nanocomposite was characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM & TEM), Fourier transform infrared (FT-IR) spectra and Diffuse reflectance spectroscopy (DRS). XRD patterns are confirm the mixed manganese oxide and bismuth oxide phase formation. XRD and TEM study of individual magnetite nanoparticle prepared at various conditions have also been exploited. Magnetite nanoparticles are incorporated inside the tube structure of BiMnOx and also it acted as template for formation of magnetite nanorods. The nanotube morphology clearly observed using HR-TEM images. The band gap values of all prepared samples were characterized by DRS absorbance spectra. The reduce band gap values (1.97 eV-2.3 eV) are obtained for certain magnetite deposited BiMnOx nanocomposite. The as prepared sample are further tested for phenol sorption capacity and its showing enhanced adsorption capacity. (C) 2016 Elsevier B.V. All rights reserved.