Tripodal ligand-stabilized layered double hydroxide nanoparticles with highly exchangeable CO3 2-

Yoshiyuki Kuroda, Yumi Miyamoto, Mitsuhiro Hibino, Kazuya Yamaguchi, Noritaka Mizuno

研究成果: Article査読

69 被引用数 (Scopus)

抄録

Layered double hydroxide nanoparticles (LDHNPs) with exceptionally small particle sizes are synthesized using a tripodal ligand of tris(hydroxymethyl) aminomethane (THAM). For example, a LDHNP with the average size of 9.7 nm (denoted as LDH(10 nm), containing CO3 2- in the interlayer), can be synthesized using a 2.0 M THAM solution. The 13C CP/MAS NMR and FTIR analyses show that THAM is ligated to the layer as an alkoxide species. The average particle size of LDH synthesized using l-lysine (buffering base) instead of THAM is larger (47.9 nm) than that of LDH(10 nm). Therefore, the size reduction is possibly explained by the specific interaction of THAM with the layer via its multiple coordination. In addition, it is confirmed by the 13C CP/MAS NMR analysis that LDH(10 nm) possesses CO3 2- species weakly interacting with the layers. LDHNPs, in particular, as-synthesized LDH(10 nm) (denoted as LDH(10 nm)-as, containing CO3 2- and Cl- in the interlayer), possesses the extremely high anion exchange abilities, and almost all anions in LDH(10 nm)-as are potentially exchangeable with NO3 -, even under ambient (CO2-existing) conditions. Furthermore, LDH(10 nm)-as can act as an efficient reusable scavenger for harmful oxyanions and remove arsenic, selenium, and boron from their dilute aqueous solutions under ambient conditions.

本文言語English
ページ(範囲)2291-2296
ページ数6
ジャーナルChemistry of Materials
25
11
DOI
出版ステータスPublished - 2013 6 11
外部発表はい

ASJC Scopus subject areas

  • 材料化学
  • 化学工学(全般)
  • 化学 (全般)

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