M.C. Sanchez , J. García , J.A. Mayoral , J. Blasco , M.G. Proietti
{"title":"Structural study of TiIV exchanged K10-montmorillonite by XRD, EXAFS and XANES","authors":"M.C. Sanchez , J. García , J.A. Mayoral , J. Blasco , M.G. Proietti","doi":"10.1016/0304-5102(94)00075-1","DOIUrl":null,"url":null,"abstract":"<div><p>Structural and catalytic properties of Ti<sup>IV</sup>/K10-montmorillonite and fine size anatase activated at different temperatures are compared. EXAFS spectra at the Ti K edge and X-ray diffraction patterns show the formation of small TiO<sub>2</sub> particles in the preparative process, which grow up with the calcination temperature. The low catalytic activity of the fine size anatase clearly shows that the activity of the exchanged clay is due to the exchanged Ti<sup>IV</sup> into the K10-montmorillonite. XANES indicates that some of the titanium exchanged atoms would present a tetrahedral structure and consequently behave as a strong Lewis acid.</p></div>","PeriodicalId":16567,"journal":{"name":"分子催化","volume":"92 3","pages":"Pages 311-324"},"PeriodicalIF":0.0000,"publicationDate":"1994-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-5102(94)00075-1","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"分子催化","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0304510294000751","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Chemical Engineering","Score":null,"Total":0}
引用次数: 3
Abstract
Structural and catalytic properties of TiIV/K10-montmorillonite and fine size anatase activated at different temperatures are compared. EXAFS spectra at the Ti K edge and X-ray diffraction patterns show the formation of small TiO2 particles in the preparative process, which grow up with the calcination temperature. The low catalytic activity of the fine size anatase clearly shows that the activity of the exchanged clay is due to the exchanged TiIV into the K10-montmorillonite. XANES indicates that some of the titanium exchanged atoms would present a tetrahedral structure and consequently behave as a strong Lewis acid.
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