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Phosphorylation triggered growth of metal phosphate on halloysite and sepiolite nanoparticles: preparation, entrapment in chitosan hydrogels and application as recyclable scavengers

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Phosphorylation triggered growth of metal phosphate on halloysite and sepiolite nanoparticles: preparation, entrapment in chitosan hydrogels and application as recyclable scavengers

dc.contributor.author	Boumhidi, Boutaina
dc.contributor.author	Katir, Nadia
dc.contributor.author	El Haskouri, Jamal
dc.contributor.author	Draoui, Khalid
dc.contributor.author	El Kadib, Abdelkrim
dc.date.accessioned	2021-03-03T15:39:31Z
dc.date.available	2021-07-27T04:45:05Z
dc.date.issued	2020
dc.identifier.citation	Boumhidi, Boutaina Katir, Nadia El Haskouri, Jamal Draoui, Khalid El Kadib, Abdelkrim 2020 Phosphorylation triggered growth of metal phosphate on halloysite and sepiolite nanoparticles: preparation, entrapment in chitosan hydrogels and application as recyclable scavengers New Journal of Chemistry 44 33 14136 14144
dc.identifier.uri	https://hdl.handle.net/10550/78161
dc.description.abstract	The rational design of porous, biomass-derived eco-friendly adsorbents instead of costly synthetic, petroleum-based resins stands as a promising approach to resolving the thorny issue of sewage treatment (for example, by supplying safe water for drinking and irrigation). Herein we explore a straightforward transformation of abundant clay and polysaccharides into highly-reactive water-cleaning adsorbents. Surface-functionalization of sepiolite and halloysite by phosphoryl chloride triggered metal dissolution from the framework (inside of the lumen for halloysite and on the external surface for sepiolite) and the concomitant growth of well-truncated crystalline metal phosphates. These unprecedented nanomaterials exhibited outstanding adsorption ability, outperforming a set of phosphorylated solids (graphene, mesoporous SBA-15 and cellulose nanocrystals) but unfortunately failed in recycling. However, their entrapment on a chitosan backbone afforded porous self-standing microspheres where the resulting hydrogels displayed good adsorption for both anionic Congo red and cationic Malachite green dyes and their mixture. The importance of shaping the material framework as porous hydrogels was demonstrated through a comparison with shrinking chitosan-clay xerogel and powder analogues. The resulting beads can be easily recovered from the water medium and reused several times. This strategy seems attractive for scavenging persistent chemicals from aqueous media.
dc.language.iso	eng
dc.relation.ispartof	New Journal of Chemistry, 2020, vol. 44, num. 33, p. 14136-14144
dc.subject	Materials nanoestructurats
dc.subject	Química
dc.title	Phosphorylation triggered growth of metal phosphate on halloysite and sepiolite nanoparticles: preparation, entrapment in chitosan hydrogels and application as recyclable scavengers
dc.type	journal article	es_ES
dc.date.updated	2021-03-03T15:39:31Z
dc.identifier.doi	10.1039/D0NJ03191G
dc.identifier.idgrec	143624
dc.rights.accessRights	open access	es_ES