Development of Novel Decarboxylation-Urea Method toward Interlayer-Anion-Controlled Layered Double Hydroxides

Masahiro Uga; Yusuke Taniguchi; Mitsuhiro Matsumoto; Takuya Okada; Kazuki Maeda; Eiko Mieda; Katsumi Katakura; Hirohisa Yamada

doi:10.1021/acsomega.3c04650

Development of Novel Decarboxylation-Urea Method toward Interlayer-Anion-Controlled Layered Double Hydroxides

ACS Omega. 2023 Sep 20;8(39):36199-36206. doi: 10.1021/acsomega.3c04650. eCollection 2023 Oct 3.

Authors

Masahiro Uga¹, Yusuke Taniguchi¹, Mitsuhiro Matsumoto¹, Takuya Okada¹, Kazuki Maeda², Eiko Mieda³, Katsumi Katakura¹, Hirohisa Yamada¹

Affiliations

¹ Department of Chemical Engineering, National Institute of Technology, Nara College, 22 Yata-cho, Yamatokoriyama, Nara 639-1080, Japan.
² Kyoeisha Chemical Co., Ltd., 5-2-5 Nishikujo Nara, Nara 630-8453, Japan.
³ Graduate School of Science Molecular Materials Science Course, Osaka Metropolitan University, 3-3-138 Sugimoto Sumiyoshi-ku, Osaka 558-8585, Japan.

Abstract

Layered double hydroxides (LDHs) are representative of a 2D anionic clay. Simple and homogeneous synthesis of interlayer-anion-controlled LDH is essential for studies and industrial production. In this study, we report the one-pot synthesis of an LDH that is selective for interlayer anions, which was labeled as "decarboxylation-urea method". We obtained LDHs intercalated with NO₃^-, Cl^-, and SO₄^2- by removing CO₂ in this method. The ionic conductivities of the prepared LDHs were investigated for their applicability to electrolytes, and it was found that Zn-Al LDH intercalated with NO₃^- showed the highest ionic conductivity (18 mS cm^-1). Therefore, the LDH intercalated with NO₃^- synthesized using the decarboxylation-urea method is promising as an alkaline solid electrolyte.