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The hydrolysis product of ferric nitrate in sodium hydroxide

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Abstract

The hydrolysis product of ferric nitrate is obtained by adding ferric nitrate solution to a boiling solution of 2.5 N sodium hydroxide. The sample is amorphous to X-rays when heated below 600° C, but it shows X-ray lines of α-Fe2O3 at 650° C. Thermal analysis of the sample gives an endothermic peak at 80° C and two small exothermic peaks at 280° C and 700° C. Transmission electron microscopy and infrared spectroscopy confirm the primary particles as a defect form of FeOOH · H2O. The defect FeOOH form of the sample converts to the disordered form of Fe2O3 on further heating around 700° C. The drastic fall in the surface area of the sample beyond 600° C suggests sudden growth of particle size, which is confirmed by a small endothermic peak at 700° C.

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Authors and Affiliations

  1. Department of Chemistry, Indian Institute of Technology, 721 302, Kharagpur, India

    J. Pattanayak & V. Sitakara Rao

  2. Electro Ceramics Division, Central Glass and Ceramics Research Institute, 700032, Jadavpur, Calcutta, India

    H. S. Maiti

Authors
  1. J. Pattanayak
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  2. V. Sitakara Rao
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  3. H. S. Maiti
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Pattanayak, J., Rao, V.S. & Maiti, H.S. The hydrolysis product of ferric nitrate in sodium hydroxide. J Mater Sci 25, 2245–2248 (1990). https://doi.org/10.1007/BF01045796

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  • DOI: https://doi.org/10.1007/BF01045796

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