Titre :

Phosphorylated micro- vs. Nano-cellulose: a comparative study on their surface functionalisation, growth of titanium-oxo-phosphate clusters and removal of chemical pollutants

Auteur(s) :

Blilid, Sara [Auteur]
Katir, Nadia [Auteur]
El Haskouri, Jamal [Auteur]
Lahcini, Mohamed [Auteur]
Royer, sebastien [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
El Kadib, Abdelkrim [Auteur]

Titre de la revue :

New Journal of Chemistry

Nom court de la revue :

New J. Chem.

Numéro :

43

Pagination :

15555-15562

Date de publication :

2019-10-21

ISSN :

1144-0546

Discipline(s) HAL :

Chimie/Catalyse

Résumé en anglais : [en]

Controlled cellulose disassembly affords many variants including amorphous micro-sized cellulose crystals (MCC) and cellulose nano-sized crystals (CNC), which have emerged recently as green and sustainable nanomaterials. ...
Lire la suite >Controlled cellulose disassembly affords many variants including amorphous micro-sized cellulose crystals (MCC) and cellulose nano-sized crystals (CNC), which have emerged recently as green and sustainable nanomaterials. Unfortunately, their lower reactivity and thermal and chemical instability constitute an impediment for multifaceted nanoscience and nanotechnology usage. Herein, MCC and CNC are functionalised using two phosphorus derivatives (phosphoryl chloride and hexachlorocyclotriphosphazene), under acid-free, urea-free and corrosive-free, gentle experimental conditions. Notably, CNC can accommodate more phosphorus species compared to MCC, with the bulky phosphazene precursor being less reactive in both cases. In contrast, CNC is less prone to post-grafting titanium alkoxide species compared to MCC. Alternatively, phosphorylation circumvents this drawback and enhanced post-grafting reactivity was observed for P-MCC and P-CNC modified cellulose. The presence of phosphorus fragments provides a way of anchoring ultrastable metal oxide clusters on the nanofibrillar surface through metal–phosphonate (P–O–Ti) bridges. Direct condensation of soluble phosphorus reagents with metal alkoxide bearing acetylacetonate fragments constitutes another alternative to grow a substantial amount of metal oxide clusters on both MCC and CNC. The beneficial effect of phosphorus incorporation is convincingly illustrated by their efficiency to scavenge representative anionic and cationic dye pollutants compared to native, non-modified cellulose and its carboxymethylcellulose analogues.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Matériaux pour la catalyse (MATCAT)

Date de dépôt :

2022-03-02T07:13:18Z
2024-01-15T16:20:08Z
2024-01-15T16:21:40Z