Sasaki Koki, Gaitan Jose A Hernandez, Okue Tsuyoshi, Matoba Shotaro, Tokuda Yuki, Miyake Koji, Uchida Yoshiaki, Nishiyama Norikazu
Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan.
Angew Chem Int Ed Engl. 2022 Nov 14;61(46):e202213773. doi: 10.1002/anie.202213773. Epub 2022 Oct 17.
Zeolites catalyze some reactions in their molecular-sized pores, but large molecules can react only on their external surface. Zeolite-nanosheets (NSs) have been developed as catalysts for large molecules. The previously reported methods to synthesize zeolite-NSs are specialized for each zeolite type. Here we propose a new method to synthesize various zeolite-NSs from the same amorphous aluminosilicate NSs (AAS-NSs) as a universal precursor. We successfully synthesized the unprecedented AAS-NSs in the hydrophilic space of the stable hyperswollen lyotropic lamellar (HL) phase. The four zeolite types could be obtained from the single-species AAS-NSs. These results imply that this method enables us to synthesize almost all types of zeolite-NSs. Moreover, the synthesized CHA-NSs have great potential for various applications because of their thickness and large external surface area.
沸石在其分子尺寸的孔道中催化一些反应，但大分子只能在其外表面发生反应。沸石纳米片（NSs）已被开发用作大分子的催化剂。先前报道的合成沸石NSs的方法是针对每种沸石类型专门设计的。在此，我们提出一种新方法，以相同的无定形硅铝酸盐纳米片（AAS-NSs）作为通用前驱体来合成各种沸石NSs。我们成功地在稳定的超溶致溶胀层状（HL）相的亲水性空间中合成了前所未有的AAS-NSs。从单一物种的AAS-NSs中可以获得四种沸石类型。这些结果表明，这种方法使我们能够合成几乎所有类型的沸石NSs。此外，合成的CHA-NSs由于其厚度和较大的外表面面积而在各种应用中具有巨大潜力。
