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Textural properties of sulfated iron hydroxide promoted with aluminum

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Abstract

Aluminum-promoted sulfated iron hydroxide samples were prepared by a coprecipitation method with different loading levels of AlIII followed by sulfation and calcination at 870 K. These samples were characterized by means of thermal gravimetric analysis, X-ray powder diffraction, nitrogen adsorption at 77 K, diffuse reflectance spectroscopy, and FT-IR spectroscopy using KBr pellets. TGA profiles showed sulfated species with different thermal stabilities in the samples, and incorporation of AlIII causes an increase in the thermal stability of the surface sulfate species. The presence of sulfate ions and AlIII promotion did not modify the crystal phase of α-Fe2O3, but it did increase the crystallite size. A textural study showed that the incorporation of AlIII into the sulfated samples led to diminished surface area and pore volume. The pore size distribution exhibited a wide spectrum of mesoporosity in all samples.

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  1. Chemistry Department, Faculty of Science, Omer–Elmoukhtar University, B.O. 919, El-Beida, Libya

    Hussein A. Khalaf

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  1. Hussein A. Khalaf
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Correspondence to Hussein A. Khalaf.

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Khalaf, H.A. Textural properties of sulfated iron hydroxide promoted with aluminum. Monatsh Chem 140, 669–674 (2009). https://doi.org/10.1007/s00706-009-0118-6

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  • DOI: https://doi.org/10.1007/s00706-009-0118-6

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