Sol-gel synthesis of SBA-15: Impact of HCl ...
Document type :
Article dans une revue scientifique
Permalink :
Title :
Sol-gel synthesis of SBA-15: Impact of HCl on surface chemistry
Author(s) :
Pirez, Cyril [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Morin, Jean-Charles [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Manayil, Jinesh C. [Auteur]
Aston University [Birmingham]
Lee, Adam F. [Auteur]
Royal Melbourne Institute of Technology University [RMIT University]
Wilson, Karen [Auteur]
Royal Melbourne Institute of Technology University [RMIT University]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Morin, Jean-Charles [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Manayil, Jinesh C. [Auteur]
Aston University [Birmingham]
Lee, Adam F. [Auteur]
Royal Melbourne Institute of Technology University [RMIT University]
Wilson, Karen [Auteur]
Royal Melbourne Institute of Technology University [RMIT University]
Journal title :
Microporous and Mesoporous Materials
Volume number :
271
Pages :
196-202
Publisher :
Elsevier
Publication date :
2018-11-15
English keyword(s) :
SBA-15
Hydrothermal synthesis
Silanol density
Surface energy
Inverse gas chromatography (IGC)
Hydrothermal synthesis
Silanol density
Surface energy
Inverse gas chromatography (IGC)
HAL domain(s) :
Chimie/Catalyse
English abstract : [en]
Surface functionalisation of mesoporous silicas is critical to their application as sorbents and catalyst supports. Here we report the impact of chloride on the physicochemical properties of SBA-15, notably the surface ...
Show more >Surface functionalisation of mesoporous silicas is critical to their application as sorbents and catalyst supports. Here we report the impact of chloride on the physicochemical properties of SBA-15, notably the surface density of reactive hydroxyl groups. Bulk and surface properties were characterised by N2 porosimetry, X-ray diffraction, SEM, TEM, FTIR spectroscopy, and Inverse gas chromatography (IGC). Increasing the HCl concentration from 0.1 → 2.0 M during the sol-gel preparation of SBA-15 increased the surface silanol coverage two-fold, and slightly widened mesopores from 4.2 to 4.9 nm. IGC reveals that the specific surface energy and corresponding surface polarity of SBA-15 correlate with surface silanol properties, and hence tuning the HCl concentration during SBA-15 synthesis offers a facile route to hydrophilic or hydrophobic silicas, and in turn a means to control their functionalisation and sorptive properties.Show less >
Show more >Surface functionalisation of mesoporous silicas is critical to their application as sorbents and catalyst supports. Here we report the impact of chloride on the physicochemical properties of SBA-15, notably the surface density of reactive hydroxyl groups. Bulk and surface properties were characterised by N2 porosimetry, X-ray diffraction, SEM, TEM, FTIR spectroscopy, and Inverse gas chromatography (IGC). Increasing the HCl concentration from 0.1 → 2.0 M during the sol-gel preparation of SBA-15 increased the surface silanol coverage two-fold, and slightly widened mesopores from 4.2 to 4.9 nm. IGC reveals that the specific surface energy and corresponding surface polarity of SBA-15 correlate with surface silanol properties, and hence tuning the HCl concentration during SBA-15 synthesis offers a facile route to hydrophilic or hydrophobic silicas, and in turn a means to control their functionalisation and sorptive properties.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
CNRS
Centrale Lille
Univ. Artois
Université de Lille
Collections :
Submission date :
2019-09-25T15:07:02Z
2021-03-01T18:02:38Z
2021-03-01T18:02:38Z