Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 441, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2022.129852
Keywords
ZIF-412; Xerogel; Indoor air; Non-woven fiber; Coating
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In this study, a granular zinc-based metalorganic gel, ZIF-412(gel), was synthesized and found to exhibit excellent adsorption performance for capturing trace volatile organic compounds. Compared to commercial activated carbon and other MOFs, ZIF-412(gel) showed higher adsorption capacity and could be regenerated at a low temperature without significant loss in capacity.
The development of superhydrophobic adsorbents for the capture of trace volatile organic compounds (VOCs) from humid indoor air is still a challenge. Herein, we reported the formation of a granular zinc-based metalorganic gel, i.e., ZIF-412(gel) by optimizing the synthesis conditions. The thermally stable xerogel exhibited high surface area (1008 m(2)/g), hydrophobicity, and viscosity for self-depositing on the substrate such as non-woven fibers. Dynamic adsorption experiments under various humidity conditions demonstrated as-synthesized ZIF-412 (gel) owned excellent VOC (hexanal) adsorption performance with adsorption capacity higher than commercial activated carbon and some water-stable MOFs including ZIF-8, ZIF-67, MIL-101(Cr) and ZIF-414. ZIF-412(gel) could be regenerated at temperature as low as 358 K without obvious loss in adsorption capacity. The adsorption mechanism of hexanal over ZIF-412(gel) is also simulated by Grand canonical Monte Carlo (GCMC).
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