NH[sub.2]-Modified UiO-66: Structural Characteristics and Functional Properties
The development of new functional materials based on metal-organic frameworks (MOFs) for adsorption and catalytic applications is one of the promising trends of modern materials science. The Zr-based MOFs, specifically UiO-66, are considered as the supports for metallic catalysts for the 5-hydroxyme...
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Veröffentlicht in: | Molecules (Basel, Switzerland) Switzerland), 2023-05, Vol.28 (9) |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The development of new functional materials based on metal-organic frameworks (MOFs) for adsorption and catalytic applications is one of the promising trends of modern materials science. The Zr-based MOFs, specifically UiO-66, are considered as the supports for metallic catalysts for the 5-hydroxymethylfurfural platform molecule reduction into valuable products. The present work focused on the effect of NH[sub.2] modification of UiO-66 on its structure and functional properties. The samples were prepared by a solvothermal method. The structure of the obtained materials was studied by X-ray diffraction, IR spectroscopy, UV-visible spectroscopy, and low-temperature nitrogen adsorption. Basic properties were investigated by HCl and CH[sub.3]COOH adsorption, and electrokinetic properties were studied by electrophoretic light scattering. UiO-66-NH[sub.2] samples with different contents of aminoterephthalate linkers were successfully prepared. A gradual decrease in the specific surface area and the fraction of micropores with a diameter of ~0.9 nm was observed with an increase in the aminoterephthalate content. A proportional increase in the total number of basic sites in UiO-66-NH[sub.2] samples was established with an increase in the aminoterephthalate content up to 75%. At the same time, a noticeable decrease in the total number of basic sites and an increase in their strength with higher aminoterephthalate content was observed. |
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ISSN: | 1420-3049 1420-3049 |
DOI: | 10.3390/molecules28093916 |