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Simultaneous use of MOFs MIL-101(Cr) and ZIF-11 in thin film nanocomposite membranes for organic solvent nanofiltration

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Abstract

The MOFs Cr carboxylate MIL-101(Cr) and Zn imidazolate ZIF-11 have different chemical and textural properties. These properties have been combined to prepare thin film nanocomposite (TFN) membranes for organic solvent nanofiltration (OSN) with the two MOFs simultaneously embedded in the same membrane. The TFN membrane containing only ZIF-11 permeated faster than that with only MIL-101(Cr) when filtering sunset yellow (SY) (4.9 L m−2 h−1 bar−1) and acridine orange (AO) (3.2 L m−2 h−1 bar−1), although MIL-101(Cr) alone gave rise in both cases to better rejections (above 90%). The combination of the two MOFs led to a versatile TFN membrane that showed an intermediate performance that improved the rejections given by the TFN membrane synthesized with ZIF-11 and the permeances corresponding to the TFN membrane synthesized with MIL-101(Cr). The effect of the temperature on the TFN membranes designed for this work has also been studied, obtaining apparent activation energies of 13.2 ± 2.1 and 8.3 ± 1.1 kJ mol−1 for the OSN of pure methanol and SY-methanol, respectively.

Graphical abstract: Simultaneous use of MOFs MIL-101(Cr) and ZIF-11 in thin film nanocomposite membranes for organic solvent nanofiltration

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Publication details

The article was received on 17 Jan 2017, accepted on 04 Apr 2017 and first published on 04 Apr 2017


Article type: Paper
DOI: 10.1039/C7DT00197E
Citation: Dalton Trans., 2017, Advance Article
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    Simultaneous use of MOFs MIL-101(Cr) and ZIF-11 in thin film nanocomposite membranes for organic solvent nanofiltration

    C. Echaide-Górriz, M. Navarro, C. Téllez and J. Coronas, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT00197E

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