Mesoporous silica powders and films—Pore size characterization by krypton adsorption

Autor:	Kuei Jung Chao, Anthony S.T. Chiang, Chien-Yang Chiu
Rok vydání:	2006
Předmět:	Materials science Chromatography Capillary condensation Krypton Evaporation Analytical chemistry chemistry.chemical_element General Chemistry Mesoporous silica Condensed Matter Physics Adsorption chemistry MCM-41 Mechanics of Materials Desorption General Materials Science Absorption (chemistry)
Zdroj:	Microporous and Mesoporous Materials. 91:244-253
ISSN:	1387-1811
DOI:	10.1016/j.micromeso.2005.12.003
Popis:	An experimental correlation was established between pore size derived from N2 adsorption, DN2 , and capillary condensation/evaporation pressure, (P/P0)t,Kr, obtained from Kr adsorption/desorption isotherms on powdery siliceous MCM-41, MCM-48 and SBA-15 samples, and was analyzed by the DBdB theory. The correlation was then used to estimate the pore size distribution from the Kr adsorption isotherm of mesoporous silica layers on Si(1 0 0) wafer prepared using P123 and Brij � 56 surfactants. It was found by TEM analysis that the pore shape in the thin films was distorted from circular to ellipsoidal, leading to different pore sizes estimated from the adsorption and desorption branches of the Kr isotherm. � 2005 Elsevier Inc. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2e627d2034d2e23a266c189276ce55c1 https://doi.org/10.1016/j.micromeso.2005.12.003 Zobrazit plný text záznamu Full Text from ScienceDirect