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EnglishMethylimogolite nanotubes (Me-IMO NTs, chemical composition (OH)3Al2O3SiCH3) are characterized by having an inner hydrophobic (fully-methylated) surface. Conversely, the outer surface is hydrophilic and positively charged below the point of zero charge (at pH = 8.6), due to the Al(OH)Al + H+ = Al(OH)2+Al equilibrium occurring at the outer surface of the NTs when they are dispersed in water. In this work, adsorption of MCPA (2-methyl-4-chlorophenoxyacetic acid) and of dichloromethane (DCM) on Me-IMO NTs was studied by means of both adsorption/desorption measurements in batch conditions (at room temperature and at different pH value) and Small Angle X-rays Scattering (SAXS). MCPA, which partially dissociates in water (pKa = 2.90), is mainly adsorbed at the outer surface of the NTs, although measurements in batch conditions show that other types of interaction occur (i.e. H-bond) at higher MCPA concentration. SAXS measurements confirm that MCPA has not entered the NTs inner pores. Interaction of the NTs with DCM, instead, is more complex: SAXS measurements show that DCM molecules interact with the NTs inner surface, whereas batch experiments indicate that additional interactions take place with the outer surface of the NTs.
Hybrid organic-inorganic nanotubes effectively adsorb some organic pollutants in aqueous phase / Nasi, R.; Sannino, F.; Picot, P.; Thill, A.; Oliviero, O.; Esposito, S.; Armandi, M.; Bonelli, B.. - In: APPLIED CLAY SCIENCE. - ISSN 0169-1317. - 186(2020), p. 105449.
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| Titolo: | Hybrid organic-inorganic nanotubes effectively adsorb some organic pollutants in aqueous phase | |
| Autori: | ||
| Data di pubblicazione: | 2020 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.clay.2020.105449 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Applied Clay Science.pdf | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia | |
| Applied Clay Science accepted.pdf | 2. Post-print / Author's Accepted Manuscript |  | Embargo: 12/01/2022 Richiedi una copia |
http://hdl.handle.net/11583/2801715
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