Carbon-mesoporous molecular sieve composite materials were synthesized by introducing sucrose into the channels of mesoporous molecular sieves(SBA-15 and MCM-41)followed by chemical etching at high temperatures.By optimizing the sucrose concentration,a balance between surface area,carbon content,and toluene adsorption capacity was achieved.TEM-EDS characterization confirmed that the carbon generated through chemical activation was uniformly distributed within the channels of the mesoporous molecular sieves.Additionally,pore size distribution analysis revealed a significant increase in micropore fractions in both mesoporous materials after functionalization,leading to enhanced toluene adsorption capacity.Notably,compared to C@MCM,C@SBA maintained relatively higher toluene adsorption capacity even after five adsorption-desorption cycles,which translates to a better regenerability.Alongside their excellent adsorption performance,the carbon-mesoporous molecular sieve composites also exhibited remarkable moisture resistance,with no significant decrease in performance under increased humidity.Lastly,both composite materials demonstrated good adsorption performance for other oxygen-containing VOC species,although adsorption was more favorable for nonpolar adsorbates,such as toluene.
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