Shila Jafari - Academia.edu (original) (raw)
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Papers by Shila Jafari
Journal of Molecular Liquids, 2015
Successful removal of methylene blue (MB) dye from aqueous solutions using nitrogen and sulfur mo... more Successful removal of methylene blue (MB) dye from aqueous solutions using nitrogen and sulfur modified TiO 2 (P25) nanoparticles has been demonstrated in this study. The modified adsorbents were characterized using various analytical methods, such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The adsorption potential of S-TiO 2 , N-TiO 2 and TiO 2 (P25) type adsorbents was tested for the removal of MB dye. The kinetic studies indicated that the adsorption of MB dye followed the pseudo-first order model, while desorption processes followed the second order model. The adsorption capacity of the adsorbent proved to be increasing as a function of initial pH of the solution. The maximum adsorption capacities were found to be 350.66, 410.12 and 282.84 mg/g of S-TiO 2 , N-TiO 2 and TiO 2 (P25), respectively. It can be concluded that modification of TiO 2 (P25) nanoparticles with N and S leads to a higher adsorptive removal of MB.
Journal of Industrial and Engineering Chemistry, 2012
ABSTRACT Nanostructured AgI/TiO2 was synthesized by deposition–precipitation method. The AgI/TiO2... more ABSTRACT Nanostructured AgI/TiO2 was synthesized by deposition–precipitation method. The AgI/TiO2 nanoparticles with different size were characterized using XRD and TEM methods. In order to compare the activity of these nanoparticles for removal of environmental pollutants, the adsorption of methyl violet by particles was studied. The equilibrium adsorption data were fitted to the different isotherms. The equilibrium data show that the modification of TiO2 nanoparticles with AgI, leads to the higher adsorption capacity (more than twice) for methyl violet. The kinetic data for adsorption of methyl violet indicates that modification of TiO2 with AgI leads to a stable adsorption.
Journal of Molecular Liquids, 2015
Successful removal of methylene blue (MB) dye from aqueous solutions using nitrogen and sulfur mo... more Successful removal of methylene blue (MB) dye from aqueous solutions using nitrogen and sulfur modified TiO 2 (P25) nanoparticles has been demonstrated in this study. The modified adsorbents were characterized using various analytical methods, such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). The adsorption potential of S-TiO 2 , N-TiO 2 and TiO 2 (P25) type adsorbents was tested for the removal of MB dye. The kinetic studies indicated that the adsorption of MB dye followed the pseudo-first order model, while desorption processes followed the second order model. The adsorption capacity of the adsorbent proved to be increasing as a function of initial pH of the solution. The maximum adsorption capacities were found to be 350.66, 410.12 and 282.84 mg/g of S-TiO 2 , N-TiO 2 and TiO 2 (P25), respectively. It can be concluded that modification of TiO 2 (P25) nanoparticles with N and S leads to a higher adsorptive removal of MB.
Journal of Industrial and Engineering Chemistry, 2012
ABSTRACT Nanostructured AgI/TiO2 was synthesized by deposition–precipitation method. The AgI/TiO2... more ABSTRACT Nanostructured AgI/TiO2 was synthesized by deposition–precipitation method. The AgI/TiO2 nanoparticles with different size were characterized using XRD and TEM methods. In order to compare the activity of these nanoparticles for removal of environmental pollutants, the adsorption of methyl violet by particles was studied. The equilibrium adsorption data were fitted to the different isotherms. The equilibrium data show that the modification of TiO2 nanoparticles with AgI, leads to the higher adsorption capacity (more than twice) for methyl violet. The kinetic data for adsorption of methyl violet indicates that modification of TiO2 with AgI leads to a stable adsorption.