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Efficient reduced graphene-oxide filter for PM2.5 removal

Abstract

Air pollution has a considerable impact on human beings among environmental problems. In particular, particulate matter less than 2.5 micrometers in diameter (PM2.5) is the biggest problem that threatens human health. In this work, we present a filter that removes the PM2.5 at a high efficiency with a low pressure-drop. A high surface area afforded by a two-dimensional nanomaterial of reduced graphene oxide (rGO) and a highly porous structure provided by an rGO foam render the filter efficient and enable low pressure drop operation. The filter with the rGO foam formed on both sides of a copper mesh plays dual role of removing the outdoor PM and at the same time purifying the indoor PM efficiently. Repeated regeneration and reuse with little loss of efficiency demonstrates the robustness of the filter. Additionally, its quality factor which represents overall efficiency was almost twice the best ever reported in the literature. With advantages such as simple fabrication, easy scaling-up, unique bidirectionality, and low power consumption, the filter presented here would exemplify the desirable set of characteristics for the PM removal filters.

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Publication details

The article was received on 17 May 2018, accepted on 06 Aug 2018 and first published on 07 Aug 2018


Article type: Paper
DOI: 10.1039/C8TA04587A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Efficient reduced graphene-oxide filter for PM2.5 removal

    W. Jung, J. S. Lee, S. Han, S. H. Ko, T. Kim and Y. H. Kim, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA04587A

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