MOF@PVA beads for dynamic and low concentration VOC capture

So, Pamela Berilyn; Liu, Chen-Yu; Lai, Yu-Lun; Lee, Cheng‐Shiuan; Lin, Chia Her

doi:10.1039/d2ma00257d

Cited by 7 publications

(1 citation statement)

References 30 publications

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“…Figure e,f compares the static adsorption capacity of N 0.1 /BDM-HCP with the reported adsorbents for C 7 H 8 and CH 2 O at 298 K and similar initial concentrations, and the data are listed in Tables S11 and S12. Under binary adsorption, the adsorption capacities of N 0.1 /BDM-HCP for low-concentration C 7 H 8 and CH 2 O were up to 64.5 mg/g (0.70 mmol/g) and 17.1 mg/g (0.57 mmol/g; inset of Figure a), which were 1.2–30.7 − and 1.5–17.4 times − those of other reported adsorbents under the single-component system, respectively. Thus, N 0.1 /BDM-HCP can be deemed as a suitable candidate for the remediation of low-concentration C 7 H 8 and CH 2 O pollution and other similar VOCs from the atmosphere.…”

Section: Resultsmentioning

confidence: 81%

Swellable Array Strategy Based on Designed Flexible Double Hypercross-linked Polymers for Synergistic Adsorption of Toluene and Formaldehyde

Wang

Luan

Muhammad

et al. 2023

Environ. Sci. Technol.

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High-capacity adsorption and removal of complex volatile organic compounds (VOCs) from real-world environments is a tough challenge for researchers. Herein, a swellable array adsorption strategy was proposed to realize the synergistic adsorption of toluene and formaldehyde on the flexible double hypercross-linked polymers (FD-HCPs). FD-HCPs exhibited multiple adsorption sites awarded by a hydrophobic benzene ring/pyrrole ring and a hydrophilic hydroxyl structural unit. The array benzene ring, hydroxyl, and pyrrole N sites in FD-HCPs effectively captured toluene and formaldehyde molecules through π–π conjugation and electrostatic interaction and weakened their mutual competitive adsorption. Interestingly, the strong binding force of toluene molecules to the skeleton deformed the pore structure of FD-HCPs and generated new adsorption microenvironments for the other adsorbate. This behavior significantly improved the adsorption capacity of FD-HCPs for toluene and formaldehyde by 20% under multiple VOCs. Moreover, the pyrrole group in FD-HCPs greatly hindered H2O molecule diffusion in the pore, thus efficiently weakening the competitive adsorption of H2O toward VOCs. These fascinating properties enabled FD-HCPs to achieve synergistic adsorption for multicomponent VOC vapor under a highly humid environment and overcame single-species VOC adsorption properties on state-of-the-art porous adsorbents. This work provides the practical feasibility of synergistic adsorption to remove complex VOCs in real-world environments.

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