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Adsorption and Structural Properties of ASD-4 Powder after Surface Modification with Mn, Fe, Co, and Ni Formates

  • PHYSICAL CHEMISTRY OF SURFACE PHENOMENA
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Abstract

Low-temperature nitrogen adsorption, X-ray phase analysis (XRD), and electron microscopy are used to analyze the physicochemical properties (morphology, texture, phase composition, specific surface area, and porosity) of ASD-4 ultrafine powder and the products of the reaction between ASD-4 nanopowder and Mn, Fe, Co, and Ni formates. Results from studying the morphology and phase composition of oxidation products are presented, and the specific surfaces and porosities of the powders are calculated. Features of the adsorption isotherms of the studied samples after modifying them with formates are discussed in terms of their conformity to a specific type, according to the recommendations of the International Union of Pure and Applied Chemistry (IUPAC), and to certain types of porosity. The data show that the ASD-4 + 2% Mn and ASD-4 + 2% Ni samples are the ones with the highest adsorption activity. The specific surface area is 19.7907 m2/g for ASD-4 + 2% Mn and 10.1244 m2/g for ASD-4 + 2% Ni. The ASD-4 + 2% Mn and ASD‑4 + 2% Ni samples have more pores of mixed shape (slit-like and cylindrical) with widths of around 48.7234 and 44.2675 Å, respectively. The pore volumes are 0.028250 and 0.012156 cm3/g for the ASD-4 + 2% Mn and ASD-4 + 2% Ni, respectively.

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Funding

This work was performed under State Budget Topic no. AAAA-A19-119031890028-0.

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Authors and Affiliations

  1. Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, 620219, Yekaterinburg, Russia

    A. V. Ryabina & V. G. Shevchenko

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  1. A. V. Ryabina
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  2. V. G. Shevchenko
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Correspondence to A. V. Ryabina.

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Translated by O. Kadkin

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Ryabina, A.V., Shevchenko, V.G. Adsorption and Structural Properties of ASD-4 Powder after Surface Modification with Mn, Fe, Co, and Ni Formates. Russ. J. Phys. Chem. 94, 2325–2330 (2020). https://doi.org/10.1134/S003602442011028X

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  • DOI: https://doi.org/10.1134/S003602442011028X

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