Communications

Enhancement of anions removal via adsorption-induced deformation of hydrated xerogels [ZrYb]O₂–Al₂O₃ prepared at different temperatures

N. E. Vakhrushev^a, A. E. Pishchulina^a, I. I. Mikhalenko^a, A. A. Il’icheva<sup>b

a</sup> Peoples Friendship University of Russia (RUDN University), 117198 Moscow, Russian Federation
^b A. A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119334 Moscow, Russian Federation

Аннотация: Alumina–zirconia doping ytterbia xerogels with an atomic ratio Al/Zr(Yb) = 1/3(0.3) prepared via sol–gel process at temperatures of 10, 25 and 60 °C were examined by TGA/DSC, SAXS and SEM methods and tested as sorbents of hexavalent chromium and methyl orange dye. A twenty-fold increase in the Henry’s law constant for dichromate ion sorption was observed after 7 days of sorption. This allows one to assume that the adsorption process induces self-formation of the xerogel porous structure resulting in the substantial enhancement of its sorption performance.

Ключевые слова: alumina, zirconia, hydrophilicity, adsorption, xerogel expansion.

Поступила в редакцию: 24.03.2025
Принята в печать: 23.06.2025

Язык публикации: английский

DOI: 10.71267/mencom.7772

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