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.
期刊介绍：
Journal of Molecular Catalysis (China) is a bimonthly journal, founded in 1987. It is a bimonthly journal, founded in 1987, sponsored by Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, under the supervision of Chinese Academy of Sciences, and published by Science Publishing House, which is a scholarly journal openly circulated both at home and abroad. The journal mainly reports the latest progress and research results on molecular catalysis. It contains academic papers, research briefs, research reports and progress reviews. The content focuses on coordination catalysis, enzyme catalysis, light-ribbed catalysis, stereochemistry in catalysis, catalytic reaction mechanism and kinetics, the study of catalyst surface states and the application of quantum chemistry in catalysis. We also provide contributions on the activation, deactivation and regeneration of homogeneous catalysts, solidified homogeneous catalysts and solidified enzyme catalysts in industrial catalytic processes, as well as on the optimisation and characterisation of catalysts for new catalytic processes.
The main target readers are scientists and postgraduates working in catalysis in research institutes, industrial and mining enterprises, as well as teachers and students of chemistry and chemical engineering departments in colleges and universities. Contributions from related professionals are welcome.
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