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In situ SAXS investigation of dual ordered mesoporous materials formation.

Schmitt, Julien LU ; Canilho, Nadia; Impéror-Clerc, Marianne; Blin, Jean-Luc; Pedersen, Jan Skov; Pérez, Javier; Lebeau, Bénédicte; Vidal, Loic and Stébé, Marie José (2015) In ChemPhysChem 16(17). p.3637-3641
Abstract
The formation of two-dimensional (2D)-hexagonal (p6m) silica-based hybrid material with a dual-mesoporosity is investigated in situ using synchrotron time-resolved Small Angle X-ray Scattering (SAXS). The material is synthesized from a mixed micellar solution of a nonionic fluorinated surfactant, RF₈(EO)₉, and a nonionic triblock copolymer, P123. Both mesoporosities, with pores dimensions at 3.3 and 8.5 nm respectively, are seen by Nitrogen sorption, TEM and SAXS. The in situ SAXS experiments reveal a mesophase formation in two steps. First the nucleation and growth of a primary 2D-hexagonal network (N1) associated to mixed micelles containing P123, then followed by the formation of the second network (N2) associated to micelles of pure... (More)
The formation of two-dimensional (2D)-hexagonal (p6m) silica-based hybrid material with a dual-mesoporosity is investigated in situ using synchrotron time-resolved Small Angle X-ray Scattering (SAXS). The material is synthesized from a mixed micellar solution of a nonionic fluorinated surfactant, RF₈(EO)₉, and a nonionic triblock copolymer, P123. Both mesoporosities, with pores dimensions at 3.3 and 8.5 nm respectively, are seen by Nitrogen sorption, TEM and SAXS. The in situ SAXS experiments reveal a mesophase formation in two steps. First the nucleation and growth of a primary 2D-hexagonal network (N1) associated to mixed micelles containing P123, then followed by the formation of the second network (N2) associated to micelles of pure RF₈(EO)₉. The data obtained from SAXS and TEM suggest that N1 is used as nucleation centers for the formation of N2, that would result in the formation of a grain with both mesoporosities. Understanding the formation mechanism of such material is an important step towards the synthesis of more complex materials with a fine tuning of the porosity. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
ChemPhysChem
volume
16
issue
17
pages
3637 - 3641
publisher
John Wiley & Sons
external identifiers
  • pmid:26383498
  • wos:000367324700013
  • scopus:84954338630
ISSN
1439-7641
DOI
10.1002/cphc.201500642
language
English
LU publication?
yes
id
32f57299-b168-4ba2-ad15-7fc04f8cd0fc (old id 8035989)
date added to LUP
2015-10-30 13:10:06
date last changed
2017-01-01 04:02:02
@article{32f57299-b168-4ba2-ad15-7fc04f8cd0fc,
  abstract     = {The formation of two-dimensional (2D)-hexagonal (p6m) silica-based hybrid material with a dual-mesoporosity is investigated in situ using synchrotron time-resolved Small Angle X-ray Scattering (SAXS). The material is synthesized from a mixed micellar solution of a nonionic fluorinated surfactant, RF₈(EO)₉, and a nonionic triblock copolymer, P123. Both mesoporosities, with pores dimensions at 3.3 and 8.5 nm respectively, are seen by Nitrogen sorption, TEM and SAXS. The in situ SAXS experiments reveal a mesophase formation in two steps. First the nucleation and growth of a primary 2D-hexagonal network (N1) associated to mixed micelles containing P123, then followed by the formation of the second network (N2) associated to micelles of pure RF₈(EO)₉. The data obtained from SAXS and TEM suggest that N1 is used as nucleation centers for the formation of N2, that would result in the formation of a grain with both mesoporosities. Understanding the formation mechanism of such material is an important step towards the synthesis of more complex materials with a fine tuning of the porosity.},
  author       = {Schmitt, Julien and Canilho, Nadia and Impéror-Clerc, Marianne and Blin, Jean-Luc and Pedersen, Jan Skov and Pérez, Javier and Lebeau, Bénédicte and Vidal, Loic and Stébé, Marie José},
  issn         = {1439-7641},
  language     = {eng},
  number       = {17},
  pages        = {3637--3641},
  publisher    = {John Wiley & Sons},
  series       = {ChemPhysChem},
  title        = {In situ SAXS investigation of dual ordered mesoporous materials formation.},
  url          = {http://dx.doi.org/10.1002/cphc.201500642},
  volume       = {16},
  year         = {2015},
}