Title :

Doping of low-Tg phosphate glass with Al2O3, B2O3 and SiO2: Part II- insertion mechanism of Al2O3 and B2O3 in phosphate network characterized by 1D/2D solid-state NMR

Author(s) :

Rajbhandari, P. [Auteur]
Montagne, Lionel [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Tricot, Grégory [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]

Journal title :

Materials Chemistry and Physics

Volume number :

218

Pages :

122-129

Publisher :

Elsevier

Publication date :

2018-10-01

English keyword(s) :

Phosphate glass
1D/2D solid-state NMR
Insertion mechanisms
Al2O3 or B2O3 doping

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [en]

In this work, the structural modifications induced by introducing small amounts (1–4 mol%) of Al2O3 and B2O3 in low-Tg pyrophosphate glass composition have been investigated using advanced solid-state 1D/2D MAS-NMR techniques. ...
Show more >In this work, the structural modifications induced by introducing small amounts (1–4 mol%) of Al2O3 and B2O3 in low-Tg pyrophosphate glass composition have been investigated using advanced solid-state 1D/2D MAS-NMR techniques. The 31P{X} D-INEPT sequence was used to establish the heteronuclear correlations between the phosphate moieties (31P) and doping elements (X = 27Al or 11B). The X{31P} REDOR and X/X DQ-SQ NMR techniques were implemented to find out the exact nature and chemical environment adopted by the doping elements within the glass matrix. The NMR analysis confirmed that majority of Al3+ ions entered into the phosphate network as six-coordinated species and all the B3+ ions entered as four-coordinated units. The combined NMR analyses revealed different insertion pathways of Al3+ ion and B3+ ion into the phosphate network. The findings of the study suggest that Al3+ ions attach purely with non-bridging oxygen of the phosphate network without breaking additional P-O-P bonds whilst B3+ ions interact with the network by breaking P-O-P linkages highlighting different chemical natures of these doping elements towards the interaction with phosphate units.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

RMN et matériaux inorganiques (RM2I)
Propriétés magnéto structurales des matériaux (PMSM)

Submission date :

2019-09-25T15:07:03Z
2021-02-26T15:13:29Z