HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

In Situ Small-Angle X-ray Scattering Investigation of the Formation of Dual-Mesoporous Materials

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.
Document type :
Journal articles
Complete list of metadata

Contributor : Srsmc Ul Connect in order to contact the contributor
Submitted on : Monday, March 27, 2017 - 11:41:47 AM
Last modification on : Sunday, February 20, 2022 - 8:08:02 AM

Links full text



Julien Schmitt, Nadia Canilho, Marianne Impéror-Clerc, Jean-Luc Blin, Jan Skov Pedersen, et al.. In Situ Small-Angle X-ray Scattering Investigation of the Formation of Dual-Mesoporous Materials. ChemPhysChem, Wiley-VCH Verlag, 2015, 16 (17), pp.3637 - 3641. ⟨10.1002/cphc.201500642⟩. ⟨hal-01496191⟩



Record views