Journal
APPLIED MATERIALS TODAY
Volume 14, Issue -, Pages 96-101Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apmt.2018.11.012
Keywords
Hierarchical porous; PM2.5 blocking; Formaldehyde adsorption; Cellulose nanofibers; HKUST-1
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Funding
- Major R&D plan of Zhejiang Natural Science Foundation [LD18E020001]
- National Key Research and Development Program [2016YFA0200204]
- Key program of National Natural Science and Foundation [NSFC 51632008]
- National Natural Science Foundations of China (NSFC) [21671171, 21875212]
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Among the air pollutants, formaldehyde and particulate matter (PM) 2.5 are the most fatal pollutant sources of indoor pollution. Typically, electric motors have to be used for indoor vent air-clean systems, which are usually high energy consuming and high cost. Herein, we prepared a porous cellulose nanofiber (CNF) stringed HKUST-1 polyhedron membrane on stainless steel screen used as a window screen for air purification. The hierarchical porous structures of CNFs stringed HKUST-1 polyhedrons generate highly nanometer to micrometer pathways for fast air transportation but blocking PM2.5. The highly micro porous cavities with open copper sites of HKUST-1 present efficient adsorption for formaldehyde. The corresponding blocking efficiency for PM2.5 is above 95% for a long time, and the adsorption capacity of formaldehyde is 47.71 mg g(-1), which can dramatically low down the formaldehyde concentration to be less than 0.1 mg m(-3) (the international safe standard of the indoor concentration of formaldehyde). Besides, due to the hierarchical but highly porous and thin thickness (similar to 5 mu m), CNFs stringed HKUST-1 layer also demonstrates air flow rate of 4.6 cm s(-1) under 200 Pa, which is enough for the indoor activity. This porous CNFs stringed HKUST-1 polyhedrons membrane on stainless steel screen has great potential for indoor air purification during haze weather. (C) 2018 Elsevier Ltd. All rights reserved.
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