{"title":"Surface chemistry of silicon nitride powders: Adsorption from non-aqueous solutions","authors":"Lennart Bergström","doi":"10.1016/0166-6622(92)80238-W","DOIUrl":null,"url":null,"abstract":"<div><p>The adsorption behaviour of different silicon nitride powders in cyclohexane has been studied. Adsorption isotherms of organic probe molecules covering a wide spectrum of Lewis acidity/basicity showed large variations in adsorption behaviour between the different probes. Mathematical analysis showed that the adsorption data could be described by a Langmuir-Freundlich type of isotherm.</p><p>Using a previously presented model of the silicon nitride surface, it was possible to relate the variation of the isoclectric point in water between the three powders, to a difference in the relative site density or silanol and amino groups on the surface. It was found that the maximum concentration (<em>T</em><sub>M</sub>) of benzoic acid increased linearly while of pyridine decreased with an increase in the relative amount of amino groups on the surface.</p></div>","PeriodicalId":10488,"journal":{"name":"Colloids and Surfaces","volume":"69 1","pages":"Pages 53-64"},"PeriodicalIF":0.0000,"publicationDate":"1992-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-6622(92)80238-W","citationCount":"16","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Colloids and Surfaces","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/016666229280238W","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 16
Abstract
The adsorption behaviour of different silicon nitride powders in cyclohexane has been studied. Adsorption isotherms of organic probe molecules covering a wide spectrum of Lewis acidity/basicity showed large variations in adsorption behaviour between the different probes. Mathematical analysis showed that the adsorption data could be described by a Langmuir-Freundlich type of isotherm.
Using a previously presented model of the silicon nitride surface, it was possible to relate the variation of the isoclectric point in water between the three powders, to a difference in the relative site density or silanol and amino groups on the surface. It was found that the maximum concentration (TM) of benzoic acid increased linearly while of pyridine decreased with an increase in the relative amount of amino groups on the surface.
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