Gun'ko, V.M., Yurchenko, G.R., Turov, V.V., Goncharuk, E.V., Zarko, V.I., Zabuga, A.G., Matkovsky, A.K., Leboda, R., Skubiszewska-Zęiba, J., Janusz, W., Phillips, Gary and Mikhalovsky, Sergey (2010) Adsorption of polar and nonpolar compounds onto complex nanooxides with silica, alumina, and titania Journal of Colloid and Interface Science, 348 (2). pp. 546-558. ISSN 0021-9797Full text not available from this repository.
Adsorption of low-molecular adsorbates (nonpolar hexane, nitrogen, weakly polar acetonitrile, and polar diethylamine, triethylamine, and water) onto individual (silica, alumina, titania), binary (silica/alumina (SA), silica/titania (ST)), and ternary (alumina/silica/titania, AST) fumed oxides was studied to analyse the effects of morphology and surface composition of the materials. Certain aspects of the interfacial phenomena dependent on the structural characteristics of oxides were analysed using calorimetry, 1H NMR, and Raman spectroscopies, XRD, and ab initio quantum-chemical calculations. The specific surface area SBET,X-to-SBET,N2 ratio (X is an organic adsorbate) changes from 0.68 for hexane adsorbed onto amorphous SA8 (degassed at 200 °C) to 1.85 for acetonitrile adsorbed onto crystalline alumina (degassed at 900 °C). These changes are relatively large because of variations in orientation, lateral interactions, and adsorption compressing of molecules adsorbed onto oxide surfaces. Larger SBET,X/SBET,N2 values are observed for mixed oxides with higher crystallinity of titania or/and alumina phases in larger primary nanoparticles with greater surface roughness and hydrophilicity. Polar adsorbates can change the structure of aggregates of oxide nanoparticles that can, in turn, affect the results of adsorption measurements.
|Item Type:||Journal article|
|Uncontrolled Keywords:||Oxide nanoparticles; Complex fumed oxides; Structural characteristics; Nonpolar adsorbates; Polar adsorbates; Interfacial phenomena|
|Subjects:||C000 Biological and Biomedical Sciences|
|DOI (a stable link to the resource):||10.1016/j.jcis.2010.04.062|
|Faculties:||Faculty of Science and Engineering > School of Pharmacy and Biomolecular Sciences|
|Depositing User:||editor spbs|
|Date Deposited:||28 Sep 2010 15:07|
|Last Modified:||30 Mar 2015 10:48|
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