A carregar...
Publicação
Effective Combination of the Metal Centers in MOF-Based Materials toward Sustainable Oxidation Catalysts
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 2.73 MB | Adobe PDF |
Orientador(es)
Resumo(s)
A successful encapsulation of Keggin-type polyoxomolybdate (H3[PMo12O40], PMo12) into metal-organic framework (MOF) materials with an identical framework but distinct metal centers (ZIF-8 with Zn2+ and ZIF-67 with Co2+) was accomplished by a straightforward room-temperature procedure. The presence of Zn2+ in the composite material PMo12@ZIF-8 instead of Co2+ in PMo12@ZIF-67 caused a remarkable increase in the catalytic activity that achieved a total oxidative desulfurization of a multicomponent model diesel under moderate and friendly conditions (oxidant: H2O2 and solvent: ionic liquid, IL). Interestingly, the parent ZIF-8-based composite with the Keggin-type polyoxotungstate (H3[PW12O40], PW12), PW12@ZIF-8, did not show the relevant catalytic activity. The ZIF-type supports present an appropriate framework to accommodate active polyoxometalates (POMs) into their cavities without leaching, but the nature of the metallic center from the POM and the metal present in the ZIF framework were vital for the catalytic performance of the composite materials.
Descrição
Funding Information:
This research work received financial support from Portuguese national funds (FCT/MCTES, Fundação para a Ciência e Tecnologia and Ministério da Ciência, Tecnologia e Ensino Superior) through the strategic project ROTEIRO/0031/2013 (for PTNMR). The work also received funding from the European Union (FEDER funds through COMPETE POCI-01-0145-FEDER- 031983).
Publisher Copyright:
© 2023 by the authors.
Palavras-chave
heterogeneous catalysis nanocomposite material oxidative desulfurization polyoxometalates zeolitic imidazolate frameworks General Materials Science Condensed Matter Physics