3 years ago

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

Synthesis of a Single-Crystalline Macroporous Layered Silicate from a Macroporous UTL-Type Zeolite and Its Accelerated Intercalation
Atsushi Shimojima, Hiroaki Wada, Masakazu Koike, Yusuke Asakura, Kazuyuki Kuroda, Naoki Kawaura, Yoshiyuki Kuroda
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. A single-crystalline macroporous layered silicate was obtained for the first time by the synthesis of a macroporous UTL-type zeolite by using acetylene black as a porogen and subsequent acidic treatment. The intercalation of tetrabutylammonium ions into the macroporous layered silicate is accelerated when compared with that of the same silicate without macropores.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201701504

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