Paramagnetic ionic liquid-coated SiO2@Fe3O4 nanoparticles - The next generation of magnetically recoverable nanocatalysts applied in the glycolysis of PET

Cano Rico, Israel; Martín Gandul, María del Carmen; Alves Fernandes, Jesum; Lodge, Rhys W.; Dupont, Jairton; Casado-Carmona, Francisco A.; Lucena, Rafael; Cardenas, Soledad; Sans, Victor; Pedro del Valle, Imanol de

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Identificadores

URI: http://hdl.handle.net/10902/20829

ISSN: 0926-3373

ISSN: 1873-3883

Fecha

2020-01

Derechos

Publicado en

Applied Catalysis B: Environmental Volume 260, January 2020, 118110

Editorial

Elsevier

Enlace a la publicación

https://doi.org/10.1016/j.apcatb.2019.118110

Palabras clave

Bifunctional catalyst

Bis(2-hydroxyethyl)terephthalate

Glycolysis

Imidazolium-based iron-containing ionic liquid

Poly(ethylene terephthalate)

Magnetic nanoparticles

Resumen/Abstract

The functionalization of silica-coated, magnetic Fe3O4 nanoparticles, with an iron-containing ionic liquid, allows for the synthesis of a Fe3O4@SiO2@(mim)[FeCl4] system that can be employed as a magnetically recoverable nanocatalyst. Herein, we present the use of Fe3O4@SiO2@(mim)[FeCl4] for the glycolysis of PET into BHET under conventional heating. The catalyst achieved nearly 100% yield and selectivity over twelve consecutive reaction cycles at 180 °C and was efficiently recovered without tedious work-up or purification processes. Additional analyses revealed that the amount of catalyst lost after each cycle was negligible and no trace of Fe was found in the purified BHET product.

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