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Multifunctional metal organic framework and carbon nanotube-modified filter for combined ultrafine dust capture and SO2 dynamic adsorption

journal contribution
posted on 2018-01-01, 00:00 authored by S Feng, X Li, Shuaifei ZhaoShuaifei Zhao, Y Hu, Z Zhong, W Xing, H Wang
© The Royal Society of Chemistry. Ultrafine dust and acid polar gas species (SO2, NOx, H2S, etc.) in the atmosphere have severe effects on human health. They are the most important indices for air quality evaluation. In this work, we developed a multifunctional, metal organic framework (MOF: UiO-66-NH2) and carbon nanotube (CNT)-modified filter for efficient ultrafine dust removal and acid gas adsorption. A thin layer of amine-functionalized CNTs was used to construct network skeletons on a polytetrafluoroethylene (PTFE) substrate and acted as an intermediate between the porous MOF nanoparticles and the PTFE substrate. The pore size of the filter was successfully regulated from 5.1 to 2.1 μm while the modified filter still had a high gas permeability of up to 402 m3 m−2 h−1 kPa−1. This well-designed multifunctional filter showed an extremely high capture efficiency (99.997%) for ultrafine dust (diameter ∼0.3 μm) and SO2 adsorption capacity in dynamic filtration. Our filter with hierarchical structures is very promising for indoor air purification.

History

Journal

Environmental Science: Nano

Volume

5

Issue

12

Pagination

3023 - 3031

Publisher

Royal Society of Chemistry

Location

London, Eng.

ISSN

2051-8153

eISSN

2051-8161

Language

eng

Publication classification

C1 Refereed article in a scholarly journal