In Situ Growth of Cyclodextrin‐Based Metal Organic Framework Air Filters for Reusable SO2 Adsorbent Applications

Abstract In situ growth of cyclodextrin‐based metal‐organic frameworks (CD‐MOFs) is investigated for the effective fabrication of MOF composites through the vapor diffusion method combined with O 2 plasma treatment. The growth rate of γ ‐CD‐MOFs on poly(ethylene terephthalate) fibers (CD‐MOFs–PET) is determined for 136 h, and the CD‐MOFs‐PET with 24 h growth time shows the highest surface area without crystal deformation. The specific surface area of the CD‐MOFs‐PET with 24 h growth time is 142.88 m 2 g −1 , which is 235 times higher than the pristine PET fibers. The 24 h CD‐MOFs‐PET shows removal efficiencies higher than 99% for PM 0.1 and higher than 95% for SO 2 gas. The CD‐MOFs‐PET demonstrates high recovery of SO 2 adsorption ability by the repeated adsorption‐desorption cycles, maintaining up to 90% of initial adsorption performance. This study intends to provide an informative discussion of the applicability of textile‐based CD‐MOFs and the development of reusable filters for the removal of SO 2 .