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Characterization of the hydrophobicity of mesoporous silicas and clays with silica pillars by water adsorption and DRIFT by João Pires; Moisés Pinto; Juncal Estella; Jesús C. Echeverría is a Chemistry article available to read on EtoBox.
What is Characterization of the hydrophobicity of mesoporous silicas and clays with silica pillars by water adsorption and DRIFT about?
The hydrophobic-hydrophilic properties of a solid are related to the material chemistry and, often, these properties are relevant to the applications of a particular material. Contrarily to what happens with other properties, such as specific surface areas or pore volumes, the methodologies to ascertain on the hydrophilicity of a porous material are not well defined. In this work, we discuss and relate the information on the hydrophobicity degree obtained from water adsorption isotherms and from diffuse reflectance infrared Fourier transform (DRIFT), in a set of porous materials. The studied materials were mainly mesoporous solids, namely of MCM-41 and SBA-15 types, two xerogels and also different porous clays heterostructures. Both techniques were informative on the hydrophobic-hydrophilic properties of the studied samples, but the correlation between the information obtained by each technique was not straightforward. Water adsorption isotherms are much more sensitive to the differences of the studied materials than the DRIFT spectra. For silica-based mesoporous materials with similar surface chemistry, the water adsorption process and hence, the hydrophobic-hydrophilic properties
Who reads Characterization of the hydrophobicity of mesoporous silicas and clays with silica pillars by water adsorption and DRIFT?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- João Pires; Moisés Pinto; Juncal Estella; Jesús C. Echeverría
- Publisher
- Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)
- Published
- 2008
- Language
- EN
- Field
- Chemistry (Physical Sciences)
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