Synthesis of a Single-Crystalline Macroporous Layered Silicate from a Macroporous UTL-Type Zeolite and Its Accelerated Intercalation

Yusuke Asakura; Naoki Kawaura; Yoshiyuki Kuroda; Masakazu Koike; Hiroaki Wada; Atsushi Shimojima; Kazuyuki Kuroda

doi:10.1002/chem.201701504

Synthesis of a Single-Crystalline Macroporous Layered Silicate from a Macroporous UTL-Type Zeolite and Its Accelerated Intercalation

Chemistry. 2017 Aug 16;23(46):11022-11029. doi: 10.1002/chem.201701504. Epub 2017 Jul 5.

Authors

Yusuke Asakura^{1

2}, Naoki Kawaura¹, Yoshiyuki Kuroda^{3

4}, Masakazu Koike¹, Hiroaki Wada¹, Atsushi Shimojima¹, Kazuyuki Kuroda^{1

5}

Affiliations

¹ Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan.
² Present address: Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan.
³ Waseda Institute for Advanced Study, Waseda University, 1-6-1 Nishiwaseda, Shinjuku-ku, Tokyo, 169-8050, Japan.
⁴ Present address: Green Hydrogen Research Center, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan.
⁵ Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku-ku, Tokyo, 169-0051, Japan.

PMID: 28543821
DOI: 10.1002/chem.201701504

Abstract

A single-crystalline macroporous layered silicate was obtained for the first time. Firstly, UTL-type zeolite with macropores was prepared hydrothermally under the presence of acetylene black as a macropore template and the subsequent calcination to remove the template. Double four-membered ring (d4r) units in the UTL framework were selectively dissolved to yield a layered silicate with macropores. Intercalation of tetrabutylammonium ions into the macroporous layered silicate is accelerated if compared with that into the same silicate without macropores, indicating the effectiveness of macropores due to easy diffusion. The layered silicate with macropores was converted into PCR-type zeolite with macropores, a hierarchically micro- and macroporous material, through interlayer condensation.

Keywords: hierarchical structure; intercalation; porous materials; silicates; zeolites.