Abstract
Because people spend a lot of time indoors every day, the presence of particulate matter with a diameter less than 2.5 µm (PM2.5) and volatile organic molecular substances in indoor air adversely affect public health. These toxic compounds can be removed from the air using high-efficiency air-filter materials with adsorption capacity. Metal-organic frameworks (MOFs) are among the most suitable materials for air purification as they are synthetic porous materials with excellent adsorption ability. In this study, the zeolitic imidazolate framework-8 (ZIF-8) is uniformly grown on the surface of polyacrylonitrile (PAN) nanofibers using an in situ growth method to prepare ZIF-8@PAN nanofiber composite membranes. The nanofiber composite membrane effectively removes PM2.5 and formaldehyde from the air. After loading the optimal amount of ZIF-8, the filtration efficiency of the nanofiber membrane for salt aerosol with a diameter of 0.3 µm increases from 90.3 % to 96.9 %, and the removal rate of formaldehyde becomes 98 % within 20 min in the enclosed space of the laboratory. Moreover, after five repeated tests, the formaldehyde adsorption rate remains above 80 %. In addition, ZIF-8@PAN nanofiber membranes are used to fabricate anti-haze window screens, which have great potential to improve indoor air quality and mitigate related health risks.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (22002193, 51803244, and U2004178), Key Scientific Research Projects of Higher Education Institutions in Henan Province (20A540002 and 21A540005), and Youth talent support project of Henan Province of China (2020 HYTP 032).
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Liu, F., Lu, T., Bu, W. et al. ZIF-8 Modified Nanofiber Composite Window Screen for Efficient Indoor PM2.5 and Formaldehyde Removal. Fibers Polym 23, 2176–2187 (2022). https://doi.org/10.1007/s12221-022-4221-1
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DOI: https://doi.org/10.1007/s12221-022-4221-1