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<p>Silica-based adsorbents incorporating organylsilsesquioxane fragments bearing organic radicals were synthesized for application in the adsorptive separation of oxygen-argon mixtures via pressure swing adsorption (PSA). Synthesis followed a base sol-gel protocol involving directed co-condensation of a reagent mixture. The materials were characterized using thermogravimetric analysis and low-temperature nitrogen adsorption. The presented results detail the oxygen and argon adsorption properties of the synthesized adsorbents. The sample functionalized with (diethylaminomethyl)silsesquioxane groups exhibited the greatest selectivity for argon. This material exhibited the greatest total volume of micropores and mesopores alongside a broad pore size distribution within the mesoporous range.</p>

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Silica with Organylsilsesquioxane Fragments as Adsorbents for Air Macrocomponent Separation

  • 期刊论文

  • 发表日期：

    2025年11月13日

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  • M. B. Alekhina,
  • A. G. Ivanov,
  • V. L. Volkov,
  • S. A. Borodin

摘要

Silica-based adsorbents incorporating organylsilsesquioxane fragments bearing organic radicals were synthesized for application in the adsorptive separation of oxygen-argon mixtures via pressure swing adsorption (PSA). Synthesis followed a base sol-gel protocol involving directed co-condensation of a reagent mixture. The materials were characterized using thermogravimetric analysis and low-temperature nitrogen adsorption. The presented results detail the oxygen and argon adsorption properties of the synthesized adsorbents. The sample functionalized with (diethylaminomethyl)silsesquioxane groups exhibited the greatest selectivity for argon. This material exhibited the greatest total volume of micropores and mesopores alongside a broad pore size distribution within the mesoporous range.