Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/187908
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Effective and selective trapping of volatile organic sulfur derivatives by montmorillonite intercalated with a μ-oxo Fe(III)–phenanthroline complex |
Autor: | Bernini, Fabrizio; Castellini, Elena; Malferrari, Daniele; Castro, Germán R. CSIC ORCID ; Sainz-Díaz, C. Ignacio ; BBrigatti, Maria Franca; Borsari, Marco | Palabras clave: | Solid−gas interface Heptanethiol Sulfur trapping Thiol Mercaptohexanol Iron−phenanthroline complex Montmorillonite |
Fecha de publicación: | 11-ene-2017 | Editor: | American Chemical Society | Citación: | ACS Applied Materials and Interfaces 9(1): 1045-1056 (2017) | Resumen: | The μ-oxo Fe(III)-phenanthroline complex [(OH)(Phen)FeOFe(Phen) (OH)] intercalated in montmorillonite provides a stable hybrid material. In this study, the ability and efficiency of this material to immobilize thiols in gas phase, acting as a trap at the solid-gas interface, were investigated. Aliphatic thiols containing both hydrophilic and hydrophobic end groups were chosen to test the selectivity of this gas trap. DR-UV-vis, IR, elemental analysis, thermal analysis and evolved gas mass spectrometry, X-ray powder diffraction, and X-ray absorption spectroscopy techniques were employed to characterize the hybrid material before and after thiol exposure and to provide information on the entrapping process. Thiol immobilization is very large, up to 21% w/w for heptanethiol. In addition, evidence was obtained that immobilization occurs through the formation of a covalent bond between the iron of the complex and the sulfur of the thiol. This provides an immobilization process characterized by a higher stability with respect to the methods based on physi-adsorption. Thiol immobilization resulted thermally reversible at least for 20 adsorption/desorption cycles. Unlike standard desulfurization processes like hydrotreating and catalytic oxidation which work at high temperatures and pressures, the present system is able to efficiently trap thiols at room temperature and pressure, thus saving energy. Furthermore, we found that the selectivity of thiol immobilization can be tuned acting on the amount of complex intercalated in montmorillonite. In particular, montmorillonite semisaturated with the complex captures both hydrophobic and hydrophilic thiols, while the saturated montmorillonite shows a strong selectivity toward the hydrophobic molecules. | Versión del editor: | https://doi.org/10.1021/acsami.6b11906 | URI: | http://hdl.handle.net/10261/187908 | DOI: | 10.1021/acsami.6b11906 | ISSN: | 1944-8244 | E-ISSN: | 1944-8252 |
Aparece en las colecciones: | (ICMM) Comunicaciones congresos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
24
checked on 06-abr-2024
WEB OF SCIENCETM
Citations
23
checked on 22-feb-2024
Page view(s)
232
checked on 19-abr-2024
Download(s)
35
checked on 19-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.