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Effect of the Conditions the Reaction on the Formation of Iron Nanoparticles during the Reduction of Iron(III) Ions with Sodium Borohydride

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Abstract—Iron nanoparticles are obtained by reducing iron(III) chloride with sodium borohydride in aqueous solutions at room temperature without using stabilizing agents. The obtained samples are characterized by X-ray diffraction analysis, low-temperature adsorption of argon, and transmission electron microscopy. The effect of the concentration of reagent solutions, the molar ratio of reagents, and exposure to ultrasound and inert atmosphere (Ar) on the size and composition of the resulting particles is found. Depending on the conditions of borohydride reduction of iron salts in an aqueous solution, both agglomerates of iron nanoparticles (5–50 nm) of 200 nm or larger and individual iron nanoparticles of 1 to 20 nm in size can be obtained. The presence and concentration of wustite and magnetite in the composition of the obtained particles mainly depend on the concentration of the reducing agent.

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This work was supported by the Russian Science Foundation, project no. 16-13-10365.

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Correspondence to T. I. Shabatina.

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The authors declare that they have no conflict of interest.

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Translated by O. Zhukova

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Vernaya, O.I., Peisikova, A.V., Fuki, M.K. et al. Effect of the Conditions the Reaction on the Formation of Iron Nanoparticles during the Reduction of Iron(III) Ions with Sodium Borohydride. Moscow Univ. Chem. Bull. 74, 326–329 (2019). https://doi.org/10.3103/S0027131419060142

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  • iron nanoparticles
  • borohydride reduction
  • size
  • composition