Адсорбційні властивості кремнеземних сорбентів, що містять в поверхневому шарі залишки карбонових і амінокарбонових кислот
Adsorption isotherms of nitrogen, n-hexane, pyridine, and diethylamine have been measured for silica adsorbents with residues of propionic and ethylenediaminetriacetic acids obtained by template method. The ordered structure of SBA-15 type has been found for synthesized samples with following parame...
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| Datum: | 2011 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | Russisch |
| Veröffentlicht: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2011
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| Online Zugang: | https://www.cpts.com.ua/index.php/cpts/article/view/128 |
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| Назва журналу: | Chemistry, Physics and Technology of Surface |
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Chemistry, Physics and Technology of Surface| Zusammenfassung: | Adsorption isotherms of nitrogen, n-hexane, pyridine, and diethylamine have been measured for silica adsorbents with residues of propionic and ethylenediaminetriacetic acids obtained by template method. The ordered structure of SBA-15 type has been found for synthesized samples with following parameters of porosity: Ssp = 550–650 m2g-1? Vs = 0.76–1.06 cm3g-1? d = 5.3–7.6 nm. The placement of carboxylic and aminocarboxylic groups in the pore surface layer and their specific adsorption interaction with electron-donor-molecules have been shown. The arrangement of adsorption isotherms of pyridine and dietylamine relatively to that of n-hexane depends on basicity of these molecules. The acidic post-synthetic treatment has been shown to be accompanied by the changes in texture rather than by appearance of additional proton-donor active cites. |
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