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Dr. Mostafa Yassin Mohamed Yassin Nassar :: Publications:

Title:
A controlled, template-free, and hydrothermal synthesis route to sphere-like α-Fe2O3 nanostructures for textile dye removal
Authors: Mostafa Y. Nassar, Ibrahim S. Ahmed, Talaat Y. Mohamed and Mai Khatab
Year: 2016
Keywords: Hydrothermal synthesis; FeCO3; Fe2O3 nanoparticles; Textile dye, Adsorption; Kinetics.
Journal: RSC Advances
Volume: 6
Issue: 24
Pages: 20001-20013
Publisher: RSC
Local/International: International
Paper Link:
Full paper Mostafa Yassin Mohamed Yassin Nassar_RSC advances paper Mai1Fe2O3.pdf
Supplementary materials Not Available
Abstract:

Iron carbonate nanospheres were synthesized via hydrothermal treatment of aqueous solutions of iron sulfate, ascorbic acid and ammonium carbonate with a molar ratio of 1 : 1 : 3, respectively, at 140 °C for 1.5 h. Pure α-Fe2O3 nanoparticles with an average crystallite size of 10.5–32 nm were produced by thermal decomposition of FeCO3 at 400–600 °C for 2 h. The compositions of the products were identified by means of XRD, FE-SEM, HR-TEM, FT-IR, BET, zeta potential and thermal analysis. The adsorption properties of α-Fe2O3 were evaluated using reactive red 195 (RR195) dye. Various parameters influencing the adsorption process were investigated, using a batch technique. The results show that α-Fe2O3 nanoparticles show good adsorption capacity and the dye removal percentage reaches about 98.77% in 10 min. Plus, increasing the surface area of the α-Fe2O3 nanoparticles from 107.7 to 165.6 m2 g−1 increases the adsorption capacity from 4.7 to 20.5 mg g−1. Moreover, the adsorption data fit the Langmuir isotherm model well and the thermodynamic parameters exhibited an endothermic and spontaneous nature for the adsorption of RR195 dye on the hematite adsorbent.

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