Tuning CO2 Capture and Conversion with Metal–Organic Frameworks Crystallized in Aqueous Graphene Oxide Suspensions
[EN]We present a green procedure for the synthesis of metal−organic frameworks (MOFs) (having Zn, Ni, or Co) in graphene oxide aqueous suspensions (obtained with graphitized or nongraphitized carbon nanofibers) avoiding organic solvents and high temperatures. The materials were thoroughly characteri...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Salamanca (USAL) |
| Repositorio: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/167985 |
| Acceso en línea: | http://hdl.handle.net/10366/167985 https://doi.org/10.1021/acsami.4c19708 |
| Access Level: | acceso abierto |
| Palabra clave: | Metal–organic frameworks Graphene oxide Carbon dioxide Adsorption Catalysis |
| Sumario: | [EN]We present a green procedure for the synthesis of metal−organic frameworks (MOFs) (having Zn, Ni, or Co) in graphene oxide aqueous suspensions (obtained with graphitized or nongraphitized carbon nanofibers) avoiding organic solvents and high temperatures. The materials were thoroughly characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), N2/CO2- physisorption, Raman and X-ray photoelectron (XPS) spectroscopies. The results demonstrate that the nature of the metal (electronegativity) and graphene oxide (defects of oxygen-containing groups) are key in the size, porosity, and defectivity (free noncoordinated linkers and open metal sites) of the MOF and significantly affect their CO2 adsorption energy (up to 6 kJ·mol−1 increase), uptake (up to 5·mmolCO2·g−1 increase), and catalytic activity (up to 35% rate increase) with respect to bulk MOFs in the solvent-free, ambient pressure CO2 cycloaddition to epoxides. |
|---|