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HBPEI-grafted carbon nanotubes for the effective retention of Pd2+ and Pt2+ through complexation

dc.contributor.authorAbdelkader-Fernández, Victor Karim
dc.contributor.authorMorales-Lara, Francisco
dc.contributor.authorLópez de la Torre, Maria Dolores
dc.contributor.authorMelguizo, Manuel
dc.contributor.authorLópez Garzón, Francisco Javier
dc.contributor.authorDomingo-García, María
dc.contributor.authorPérez-Mendoza, Manuel
dc.date.accessioned2024-02-07T00:32:50Z
dc.date.available2024-02-07T00:32:50Z
dc.date.issued2018-06-21
dc.description.abstractHyperbranched poly(ethyleneimine) (HBPEI) molecules in solution present high capacity to form stable complexes with transition metal ions due to the large number of amino groups ready to form chelates. We grafted HBPEI molecules to a multi-walled carbon nanotube (MWCNT) surface through covalent bonding, preparing solid hybrids which retain the chemical properties of the free poly-alkylamine molecules. In this way, we are able to transfer the complexation capacity of such molecules to a solid material adequate to act as a high-capacity sorbent for metal transition ions. We tested the HBPEI/MWCNT hybrids for the retention of Pd2+ and Pt2+ and the retention values obtained are much larger than those previously reported with fast retention kinetics. The kinetics and the XPS analysis of the metal ion/HBPEI/MWCNT ensemble indicate that the retention takes place through the formation of chelates with two or three nitrogen atoms and with Cl− anions as co-ligands. Moreover, the results allow us to tune the metal loading on the hybrids by controlling the solution conditions. This is important because the XPS valence band analysis demonstrates that metal complexation directly modifies the electronic behaviour of the carbon nanotubes, which supports the stable covalent bond between HBPEI molecules and MWCNT and opens the possibility for tuning the electronic properties of the tubes.es_ES
dc.description.sponsorshipThe financial support of the MINECO (projects MAT2014- 60104-C2-1-R and MAT2014-60104-C2-2-R), FEDER program, Autonomous Regional Government (J. de Andalucía, group RNM342) and Programa de Fortalecimiento de la I+D+i from UGR is acknowledged. The technical assistance of Centre of Instrumental Facilities, STI, of the University of Jaén is also acknowledged.es_ES
dc.identifier.citationInorg. Chem. Front [2018];[5]: 1978es_ES
dc.identifier.other10.1039/c8qi00320ces_ES
dc.identifier.urihttps://hdl.handle.net/10953/2165
dc.language.isoenges_ES
dc.publisherRoyal Society of Chemistryes_ES
dc.relation.ispartofInorganic Chemistry Frontierses_ES
dc.rightsCC0 1.0 Universal*
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/*
dc.subjectCarbon Nanotubeses_ES
dc.subjectHBPEIes_ES
dc.titleHBPEI-grafted carbon nanotubes for the effective retention of Pd2+ and Pt2+ through complexationes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES

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