Barium hexaferrite nanoparticles are synthesized through co-precipitation technique at different annealing temperature. Series of BaFe 12−x Hg x O 19 nanoparticles, 0.00 ≤ x ≤ 0.30, are prepared under the best verified conditions (annealed at 1000°C) to investigate the effect of partial substitution of Hg 2+ ions on the physical properties of BaFe 12 O 19 nanoparticles. The hysteresis loops at room temperature show the behavior of hard ferromagnetic. The estimated values of saturation magnetization M s , remnant magnetization M r and magnetic moment m B rise as Hg 2+ ions content increases till x = 0.10, beyond which they reduce. A reverse trend is obtained for intrinsic coercivity Hi and coercivity Hc versus Hg 2+ ions content. BaFe 12−x Hg x O 19 nanoparticles are investigated through the measurements of electron paramagnetic resonance (EPR). The calculated EPR parameters show an enhancement for BaFe 12−x Hg x O 19 nanoparticles up to x = 0.10. The obtained results reveal that samples under investigation can be suitable candidate for different industrial applications.
In this study, poly(acrylonitrile‐co‐vinyl acetate) (P(AN‐co‐VA)) reinforced by 0.1, 0.5, and 1.0% w/w functionalized single‐wall carbon nanotubes (SWCNTs), fibrous nanocomposites were fabricated using electrospinning technique. Functional analysis revealed the presence of hydroxyl band which is characteristic of the carboxylated SWCNTs. Morphological analysis manifested neatly uniform nanofibers with an average fiber diameter varying from 62 to 308 nm depending on the processing conditions of electrospinning. Contact angle measurements showed a decline in the contact angle by increasing carboxylated SWCNTs contents. Oil/water separation was assessed using dead‐end module under different testing conditions and showed an excellent performance. The maximum rejection ratio for the oil/water separation test for the electrospun fibrous nanocomposite was about 97.5% for 0.5 wt% carboxylated SWCNTs. These results conveyed the promising performance of electrospun P(AN‐co‐VA)/SWCNTs nanocomposite membranes for oil/water separation technology.
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