Journal of Chemistry and Chemical Research

Due to its unique fluid properties and mild operating conditions, the supercritical CO₂-assisted preparation technology shows significant advantages in the structural regulation of porous carbon materials. Focusing on the adsorption performance of volatile organic compounds (VOCs), this study explores the structure-activity relationship between the pore size distribution, specific surface area, surface chemical functional groups of porous carbon materials and their adsorption effects. By adjusting the pressure, temperature, and time of supercritical CO₂ treatment, the controllable construction of pore structures is achieved. Meanwhile, the surface chemical properties of the materials are characterized using BET specific surface area analysis, pore size distribution testing, and Fourier transform infrared spectroscopy (FTIR). The experimental results indicate that an appropriate ratio of mesopores to micropores and surface oxygen-containing functional groups can significantly enhance the adsorption capacity and selectivity of VOCs. This research not only reveals the mechanism of structural regulation of supercritical CO₂ in the preparation of porous carbon materials but also provides a feasible path for the green synthesis of high-efficiency adsorbents, which has important application value for VOCs pollution control.

Supercritical CO₂; Porous carbon materials; VOCs adsorption; Structure-activity relationship; Green synthesis