A Dataset for Structural Characterization and Low-Pressure CO₂ Capture of CNF-Reinforced γ-AlOOH Aerogels

The dataset includes experimental results for the synthesis and characterization of γ-AlOOH and TEMPO-oxidized cellulose nanofiber (CNF)-reinforced aluminum hydroxide–methoxide aerogels, including XRD, FTIR, N2 adsorption–desorption, BET surface area, pore-size distribution, FE-SEM/EDS, elemental mapping, TEM, XPS, and TGA data. It also contains low-pressure CO₂ adsorption isotherms at 273–298 K, adsorption-isotherm modeling using Langmuir, Freundlich, Dubinin–Radushkevich, and Temkin models, isosteric heat of adsorption, CO₂-TPD profiles, and ten-cycle adsorption–desorption data.

The dataset supports analysis of the relationships between CNF incorporation, phase evolution, hierarchical mesoporosity, surface functional groups, and CO2 adsorption performance. The ACF-10% aerogel exhibits approximately 1.25 mmol/g CO2 uptake at 273 K and 1.1 bar and retains more than 96% of its initial capacity after ten cycles.