Szczegóły publikacji
Opis bibliograficzny
Low field $^{1}H$ $NMR$ characterization of mesoporous silica $MCM-41$ and $SBA-15$ filled with different amount of water / A. T. KRZYŻAK, I. HABINA // Microporous and Mesoporous Materials ; ISSN 1387-1811. — 2016 — vol. 231, s. 230–239. — Bibliogr. s. 239, Abstr. — Publikacja dostępna online od: 2016-05-27
Autorzy (2)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 99717 |
|---|---|
| Data dodania do BaDAP | 2016-10-07 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.micromeso.2016.05.032 |
| Rok publikacji | 2016 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Microporous and Mesoporous Materials |
Abstract
The low field H-1 NMR characterization of pure mesoporous silica materials MCM-41 and SBA-15 as a function of water content is presented. The values of surface relaxivities for both materials were estimated in order to compare pore size distributions obtained from relaxation spectra and N-2 adsorption measurements. This comparison led to differentiation between contributions from 'inner-bulk' water molecules in pores and these from the surface. The T-1/T-2 ratio reflecting the strength of interaction between water molecules and the mesoporous silica surface was confirmed to be higher for SBA-15. Measurements for a mesopore surface partially covered by water provided quantitative information on the hydroxylation rate. (C) 2016 Elsevier Inc. All rights reserved.