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Rapid room temperature conversion of hydroxy double salt to MOF-505 for CO2 capture

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Abstract

Given the fact that solvothermal synthesis is the most common synthetic method to obtain metal–organic frameworks (MOFs) on a gram scale, it still remains a great challenge to produce MOFs in a scalable and sustainable synthetic process. In this work, we develop a facile and rapid synthesis of copper-based MOF-505 by the exploitation of layered (Zn,Cu) hydroxy double salt as the intermediate for efficient MOF-505 crystallization at room temperature, in which [(Zn,Cu)(OH)NO3] is synthesized by reacting ZnO with Cu(NO3)2. Under an optimized reaction time of 25 min, MOF-505-25 exhibits a Brunauer–Emmett–Teller (BET) surface area of 1076 m2 g−1 and the pore size is narrowly distributed at 5.9 and 8.0 Å. With respect to CO2 adsorption and separation performance, MOF-505-25 shows a moderate CO2 uptake of 3.51 mmol g−1 at 298 K and 100 kPa and high CO2/CH4 and CO2/N2 adsorption selectivities of 7 and 29. Particularly, the formation of MOF-505 can be completed within a short reaction time (less than 30 min) whilst maintaining high quality. This facile and rapid room temperature synthetic procedure would pave the way for promoting the development of MOF materials large-scale production with minimizing the energy input.

Graphical abstract: Rapid room temperature conversion of hydroxy double salt to MOF-505 for CO2 capture

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Publication details

The article was received on 03 Sep 2018, accepted on 01 Nov 2018 and first published on 02 Nov 2018


Article type: Paper
DOI: 10.1039/C8CE01489B
Citation: CrystEngComm, 2019, Advance Article
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    Rapid room temperature conversion of hydroxy double salt to MOF-505 for CO2 capture

    Y. Chen, H. Wu, Q. Xiao, D. Lv, F. Li, Z. Li and Q. Xia, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C8CE01489B

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