SORPTION–STRUCTURAL ANALYSIS OF n-HEPTANE MOLECULE ADSORPTION ON A DIACETATECELLULOSE–SILICA HYBRID BIONANOCOMPOSITE
At 303 K, an adsorption isotherm of the ammonia molecule on a diacetate cellulose (DAC)–silica hybrid bionanocomposite was
obtained. Using the equations of the Langmuir, BET, and Aranovich isotherm models, the sorption–structural parameters were
calculated. The model constants indicate that the surface is energetically active, strong adsorbent–adsorbate interactions are present
on the adsorbent surface, and a well-defined and stable first monolayer is formed, with the adsorption process proceeding
predominantly via physical adsorption. The high specific surface area values demonstrate the presence of an energetically
heterogeneous and active surface with high adsorption capacity, while the average pore radius confirms a hierarchical micro–
mesoporous structure.
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