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Issue 29, 2018
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Reactive gas atmospheres as a tool for the synthesis of MOFs: the creation of a metal hybrid fumarate with a controlled Fe/Al composition profile

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Abstract

The use of reactive gas atmospheres is proposed here as a new tool to control the synthesis of MOFs. With the addition of Al to an Fe-fumarate synthesis medium (which produces the typical structure of MOF MIL-88A(Fe)), a hybrid Fe/Al-fumarate that exhibits the structure of MOF MIL-53(Al)-FA was obtained even though both metals could be identified in the resulting material by STEM-HAADF. The use of CO and O2 atmospheres (6 bar) in the synthesis of both MIL-88A(Fe) and MIL-53(Fe/Al)-FA might accelerate their synthesis and give rise to a highly crystalline solid and to core–shell nanoparticles (190 ± 42 nm) with an Fe-rich core surrounded by an Al-rich shell, i.e., with a controlled Fe/Al atomic distribution. After pyrolysis the MIL-53(Fe/Al)-FA particles exhibited superparamagnetism while keeping some texture (244 m2 g−1vs. 862 m2 g−1 of the as-made material).

Graphical abstract: Reactive gas atmospheres as a tool for the synthesis of MOFs: the creation of a metal hybrid fumarate with a controlled Fe/Al composition profile

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Article information


Submitted
18 Apr 2018
Accepted
28 Jun 2018
First published
29 Jun 2018

J. Mater. Chem. A, 2018,6, 14352-14358
Article type
Paper

Reactive gas atmospheres as a tool for the synthesis of MOFs: the creation of a metal hybrid fumarate with a controlled Fe/Al composition profile

R. Monteagudo-Olivan, M. Arruebo, P. López-Ram-de-Viu, V. Sebastian and J. Coronas, J. Mater. Chem. A, 2018, 6, 14352
DOI: 10.1039/C8TA03557A

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