Ryu Abe, Junko N. Kondo, Michikazu Hara, Kazunari Domen
{"title":"A microporous structure of a thin film made of an ion-exchangeable layered compound","authors":"Ryu Abe, Junko N. Kondo, Michikazu Hara, Kazunari Domen","doi":"10.1016/S0968-5677(98)00012-1","DOIUrl":null,"url":null,"abstract":"<div><p>A thin film made of an ion-exchangeable layered compound, K<sub>4</sub>Nb<sub>6</sub>O<sub>17</sub>, was prepared by a novel method. Fine particles of K<sub>4</sub>Nb<sub>6</sub>O<sub>17</sub> obtained by wet-grinding of the powder were coated on a substrate and calcined. Recrystallization of the fine particles at 1073<!--> <!-->K was confirmed by XRD and SEM, and very flat and large crystals with the <em>b</em>-axis perpendicular to the substrate surface were obtained. The obtained thin film had a layered structure and an ion-exchange property similar to that of K<sub>4</sub>Nb<sub>6</sub>O<sub>17</sub> powder. The adsorption of CO was investigated for the thin film calcined at 1073<!--> <!-->K by IR spectroscopy. The initially IR-inactive H<sup>+</sup> species were suggested to be transformed into OH groups as a result of CO adsorption at the interlayer space.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 3","pages":"Pages 229-233"},"PeriodicalIF":0.0000,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00012-1","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Supramolecular Science","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0968567798000121","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
A thin film made of an ion-exchangeable layered compound, K4Nb6O17, was prepared by a novel method. Fine particles of K4Nb6O17 obtained by wet-grinding of the powder were coated on a substrate and calcined. Recrystallization of the fine particles at 1073 K was confirmed by XRD and SEM, and very flat and large crystals with the b-axis perpendicular to the substrate surface were obtained. The obtained thin film had a layered structure and an ion-exchange property similar to that of K4Nb6O17 powder. The adsorption of CO was investigated for the thin film calcined at 1073 K by IR spectroscopy. The initially IR-inactive H+ species were suggested to be transformed into OH groups as a result of CO adsorption at the interlayer space.
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