Electrochemical Generation of Thin Silica Films with Hierarchical Porosity

Abstract : Thin films with combined macropores (∼100 nm) and mesopores (∼3 nm) can be prepared by the electro-assisted deposition of a mesoporous silica material inside a polystyrene bead assembly. The filling of voids between the polystyrene beads template strongly depends on the deposition time, as demonstrated by systematic SEM analysis. Low deposition time leads only to very thin silica layers on the PS beads. Longer deposition time leads to the complete filling of the macroporous texture and to the growth of an additional overlayer with very well oriented pores normal to the electrode surface. The presence of mesopores into the film has been evidenced with using TEM, grazing incidence X-ray diffraction (GIXD), and Krypton sorption isotherm. The electrochemical characterization demonstrates that the hierarchical material is highly permeable to external reagents, being thereby promising for various applications involving such mass transport processes.
Document type :
Journal articles
Complete list of metadatas

https://hal.univ-lorraine.fr/hal-01941890
Contributor : Alain Walcarius <>
Submitted on : Sunday, December 2, 2018 - 5:37:28 PM
Last modification on : Monday, August 12, 2019 - 1:38:02 PM

Identifiers

Collections

Citation

Mathieu Etienne, Sébastien Sallard, Michael Schröder, Yann Guillemin, Simone Mascotto, et al.. Electrochemical Generation of Thin Silica Films with Hierarchical Porosity. Chemistry of Materials, American Chemical Society, 2010, 22 (11), pp.3426-3432. ⟨10.1021/cm1004278⟩. ⟨hal-01941890⟩

Share

Metrics

Record views

22