Polyvinyl pyrrolidone (PVP) coated Fe3O4 Nanoparticles NanoparticlesPreparation, Properties and Applications.DE

Fe3O4 nanoparticles coated with varied amount of poly vinyl pyrrolidone (PVP) were successfully manufactured by a co-precipitation method. The synthesis route followed by calcination at 400 ºC led to evolution of crystalline cubic inverse spinel structure Fe3O4/PVP nanoparticles with excellent adsorptive properties owing to high surface area and pore volume. Adsorption study performed using Fe3O4/PVP (1g) as adsorbent since it shown high surface area and the highest pore volume. The highest adsorption was found at pH 6 using Fe3O4/PVP (1g) as adsorbent. The equilibrium time for Congo red dye was 90 minutes and it is independent of the initial concentration of Congo red dye. The correlation coefficient R2 was higher for Freundlich isotherm than that of Langmuir isotherm for Congo red dye, indicating suitable fitting of Freundlich isotherm is this study. Pseudo second order kinetics is the appropriate kinetics to reach the equilibrium for dye Congo red at the adsorbent Fe3O4/PVP surface. Therefore, it has been concluded that PVP coated Fe3O4 NPs are effective adsorbent for elimination of dye Congo red and hence it may be used for waste water remediation on industrial scale.