Effect of hydration and dehydration on the properties of SBA-15 layer studied by humidity scanning QCM-D

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Effect of hydration and dehydration on the properties of SBA-15 layer studied by humidity scanning QCM-D

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Publication Article, peer reviewed scientific
Title Effect of hydration and dehydration on the properties of SBA-15 layer studied by humidity scanning QCM-D
Author Znamenskaya, Yana ; Björklund, Sebastian ; Kocherbitov, Vitaly ; Alfredsson, Viveka
Date 2016
English abstract
Surface deposited layers of mesoporous silica particles could function as support for bio-sensing or drug release applications. It is crucial to control the surface deposition process and employ relevant techniques to characterize the properties of the particles on the surface. Here, we deposit SBA-15 particles on native silica or cationic surfaces and characterize the hydration and dehydration by employing a novel method based on humidity scanning quartz crystal microbalance with dissipation (HS QCM-D). SBA-15 platelets are deposited with mesopores oriented parallel to the surface normal using drop deposition. SEM shows a monolayer on the surface, which is established as stable. Water sorption-desorption isotherms of the SBA-15 layer from HS QCM-D are compared with isotherms from water sorption calorimetry and nitrogen sorption on bulk material. We demonstrate that HS QCM-D provides results in good agreement with results obtained with the reference methods. The properties of SBA-15 particles are retained during the deposition process and unaffected by the presence of the surface. In addition, HS QCM-D is a fast technique that requires significantly lower amount of material (∼5000 times) compared to experiments on bulk material. HS QCM-D provides complete characterization of the pore size distribution of SBA-15.
DOI https://doi.org/10.1016/j.micromeso.2016.04.034 (link to publisher's fulltext.)
Link http://dx.doi.org/10.1016/j.micromeso.2016.04.034 .Icon
Publisher Elsevier
Host/Issue Microporous and Mesoporous Materials;
Volume 230
ISSN 1387-1811
Pages 58-65
Language eng (iso)
Subject Hydration
Mesoporous silica
HS QCM-D
Humidity scanning
Humanities/Social Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/21839 Permalink to this page
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