Ellipsoporosimetry and thermoporometry analyses of mesoporous titania film containing silver nanoparticles

Abstract : An investigation of the porosity of a thin mesoporous titania film was performed using both ellipsoporosimetry and thermoporometry. These films are prepared using the sol-gel process with a block copolymer PEO-PPO-PEO (P123) and a thermal treatment at 350 degrees C. The film is constituted by a single layer with oblate pores whose small and high diameters are respectively equal to 5 and 7 nm. The porous volume is 31% or 36% depending of the method used. The porous titania film has also been used as a template for the growth of silver nanoparticles. Impregnation of the porous film in a silver salt solution is followed by a reduction step with sodium borohydride. Ellipsoporosimetry is then the only way to study the porosity, using a two-layer model. The first thin layer (35 nm) is slightly porous and contains a lot of large silver nanoparticles. The second under layer is thicker (180 nm) and has a porosity similar to the empty layer one.
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Submitted on : Monday, June 10, 2013 - 2:34:25 PM
Last modification on : Monday, May 20, 2019 - 2:37:07 PM

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Fernand Chassagneux, R. Chiriac, François Bessueille, M. Karabulut, Laurence Bois, et al.. Ellipsoporosimetry and thermoporometry analyses of mesoporous titania film containing silver nanoparticles. Microporous and Mesoporous Materials, Elsevier, 2011, 139 (1-3), pp.52-58. ⟨10.1016/j.micromeso.2010.10.016⟩. ⟨hal-00832292⟩

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