由离子交换层状化合物制成的薄膜的微孔结构

Ryu Abe, Junko N. Kondo, Michikazu Hara, Kazunari Domen
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引用次数: 5

摘要

采用新方法制备了离子交换层状化合物K4Nb6O17薄膜。将湿法研磨得到的K4Nb6O17粉末包覆在衬底上并进行煅烧。XRD和SEM证实了1073 K时细颗粒的再结晶,得到了b轴垂直于衬底表面的扁平大晶体。制备的薄膜具有层状结构,离子交换性能与K4Nb6O17粉末相似。用红外光谱法研究了1073 K煅烧薄膜对CO的吸附。最初不具有ir活性的H+由于CO在层间空间的吸附而转化为OH基团。
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A microporous structure of a thin film made of an ion-exchangeable layered compound

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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