Highly Efficient Surface Modification of Layered Perovskite Nanosheets with a Phosphorus Coupling Reagent Making Use of Microchannels

Takeshi Sugaya; Régis Guégan; Naokazu Idota; Takehiko Tsukahara; Yoshiyuki Sugahara

doi:10.1021/acs.langmuir.0c00560

Highly Efficient Surface Modification of Layered Perovskite Nanosheets with a Phosphorus Coupling Reagent Making Use of Microchannels

Langmuir. 2020 Jul 7;36(26):7252-7258. doi: 10.1021/acs.langmuir.0c00560. Epub 2020 Jun 10.

Authors

Takeshi Sugaya¹, Régis Guégan², Naokazu Idota³, Takehiko Tsukahara⁴, Yoshiyuki Sugahara^{1

5}

Affiliations

¹ Department of Applied Chemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.
² Global Center for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.
³ Department of Chemical Science and Technology, Faculty of Bioscience and Applied Chemistry, Hosei University, 3-7-2 Kajino-cho, Koganeishi, Tokyo 184-8584, Japan.
⁴ Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1-N1-6, O-okayama, Meguro-ku, Tokyo 152-8550, Japan.
⁵ Kagami Memorial Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku-ku, Tokyo 169-0051, Japan.

PMID: 32423209
DOI: 10.1021/acs.langmuir.0c00560

Abstract

Surface modification of niobate nanosheets in a double-Y-type microchannel was achieved for the first time using parallel flows of an aqueous dispersion of nanosheets derived from ion-exchangeable layered perovskite via delamination with a tetrabutylammonium hydroxide aqueous solution and a cyclohexane solution of oleyl phosphate. The surface modification was essentially completed within 4.6 s, and spectroscopic characterization (IR, solid-state ¹³C and ³¹P NMR) demonstrated the successful surface modification. The surface modification using a biphasic system in a vial using the same liquids required more than 4 h, indicating the extremely high efficiency of surface modification in the microchannel.