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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

AuthorsMonteagudo-Olivan, Rebeca; Arruebo, Manuel; López-Ram-de-Víu, Pilar ; Sebastián, Víctor; Coronas, Joaquín
Issue Date2018
PublisherRoyal Society of Chemistry
CitationJournal of Materials Chemistry A 6(29): 14352-14358 (2018)
AbstractThe 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).
Publisher version (URL)https://doi.org/10.1039/C8TA03557A
Appears in Collections:(ISQCH) Artículos
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