Positron Annihilation Lifetime Spectroscopy Study of the Formation of Mesoporous Materials from the Zeolite Precursor
S. Bosnara, D. Bosnarb and B. Gržetac
aDivision of Materials Chemistry, Rudjer Bošković Institute, Bijenička 51, Zagreb, Croatia
bDepartment of Physics, Faculty of Science, University of Zagreb, Bijenička 32, Zagreb, Croatia
cDivision of Materials Physics, Rudjer Bošković Institute, Bijenička 51, Zagreb, Croatia
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In this work, positron annihilation lifetime spectroscopy was used for the structural characterisation of porous materials prepared from amorphous zeolite precursors acting as the starting materials and hexadecyltrimethylammonium bromide acting as a mesoporous template. The best fits of the obtained lifetime spectra provide a four-component exponential decomposition. The lifetime values of the long-lived components point to the presence of mesoporous voids. Infrared and X-ray analyses show that the obtained materials consist partly of a crystalline zeolite structure.

DOI: 10.12693/APhysPolA.125.775
PACS numbers: 78.70.Bj, 81.05.Rm, 61.43.Gt