One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities

Víctor Oestreicher; Ismael Fábregas; Matías Jobbágy

doi:10.1021/jp510341q

One-pot epoxide-driven synthesis of M₂Al(OH)₆Cl·1.5H₂O layered double hydroxides: Precipitation mechanism and relative stabilities

Víctor Oestreicher
, Ismael Fábregas
, Matías Jobbágy^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

A family of single-crystalline particles of M₂Al(OH)₆Cl·1.5H₂O layered double hydroxides (LDH) with M(II) a transition-metal cation were obtained by a one-pot room-temperature homogeneous alkalinization driven by glycidol ring opening. In contrast with traditional homogeneous methods, LDH phases are obtained in the exchangeable chloride-containing form. The main precipitation steps were assessed by continuous measurement of pH profiles, field emission scanning electron microscopy, and powder X-ray diffraction, revealing the heterogeneous nucleation of LDH phase over previously formed nano-Al(OH)₃ seeds. The precipitation pH plateau of each LDH follows the trend of the inherent solubility of the single M(II) phases obtained under alkalinization. A linear free-energy relation links the solubility of the bare M(II) hydroxides with the correspondent M(II)-Al(III) LDH, in good agreement with previously reported thermochemical models.

Original language	English
Pages (from-to)	30274-30281
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	118
Issue number	51
DOIs	https://doi.org/10.1021/jp510341q
Publication status	Published - 26 Dec 2014
Externally published	Yes

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title = "One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities",

abstract = "A family of single-crystalline particles of M2Al(OH)6Cl·1.5H2O layered double hydroxides (LDH) with M(II) a transition-metal cation were obtained by a one-pot room-temperature homogeneous alkalinization driven by glycidol ring opening. In contrast with traditional homogeneous methods, LDH phases are obtained in the exchangeable chloride-containing form. The main precipitation steps were assessed by continuous measurement of pH profiles, field emission scanning electron microscopy, and powder X-ray diffraction, revealing the heterogeneous nucleation of LDH phase over previously formed nano-Al(OH)3 seeds. The precipitation pH plateau of each LDH follows the trend of the inherent solubility of the single M(II) phases obtained under alkalinization. A linear free-energy relation links the solubility of the bare M(II) hydroxides with the correspondent M(II)-Al(III) LDH, in good agreement with previously reported thermochemical models.",

author = "V{\'i}ctor Oestreicher and Ismael F{\'a}bregas and Mat{\'i}as Jobb{\'a}gy",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2014",

month = dec,

day = "26",

doi = "10.1021/jp510341q",

language = "English",

volume = "118",

pages = "30274--30281",

journal = "Journal of Physical Chemistry C",

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TY - JOUR

T1 - One-pot epoxide-driven synthesis of M2Al(OH)6Cl·1.5H2O layered double hydroxides

T2 - Precipitation mechanism and relative stabilities

AU - Oestreicher, Víctor

AU - Fábregas, Ismael

AU - Jobbágy, Matías

PY - 2014/12/26

Y1 - 2014/12/26

N2 - A family of single-crystalline particles of M2Al(OH)6Cl·1.5H2O layered double hydroxides (LDH) with M(II) a transition-metal cation were obtained by a one-pot room-temperature homogeneous alkalinization driven by glycidol ring opening. In contrast with traditional homogeneous methods, LDH phases are obtained in the exchangeable chloride-containing form. The main precipitation steps were assessed by continuous measurement of pH profiles, field emission scanning electron microscopy, and powder X-ray diffraction, revealing the heterogeneous nucleation of LDH phase over previously formed nano-Al(OH)3 seeds. The precipitation pH plateau of each LDH follows the trend of the inherent solubility of the single M(II) phases obtained under alkalinization. A linear free-energy relation links the solubility of the bare M(II) hydroxides with the correspondent M(II)-Al(III) LDH, in good agreement with previously reported thermochemical models.

AB - A family of single-crystalline particles of M2Al(OH)6Cl·1.5H2O layered double hydroxides (LDH) with M(II) a transition-metal cation were obtained by a one-pot room-temperature homogeneous alkalinization driven by glycidol ring opening. In contrast with traditional homogeneous methods, LDH phases are obtained in the exchangeable chloride-containing form. The main precipitation steps were assessed by continuous measurement of pH profiles, field emission scanning electron microscopy, and powder X-ray diffraction, revealing the heterogeneous nucleation of LDH phase over previously formed nano-Al(OH)3 seeds. The precipitation pH plateau of each LDH follows the trend of the inherent solubility of the single M(II) phases obtained under alkalinization. A linear free-energy relation links the solubility of the bare M(II) hydroxides with the correspondent M(II)-Al(III) LDH, in good agreement with previously reported thermochemical models.

UR - https://www.scopus.com/pages/publications/84920025662

U2 - 10.1021/jp510341q

DO - 10.1021/jp510341q

M3 - Article

AN - SCOPUS:84920025662

SN - 1932-7447

VL - 118

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EP - 30281

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 51

ER -

One-pot epoxide-driven synthesis of M₂Al(OH)₆Cl·1.5H₂O layered double hydroxides: Precipitation mechanism and relative stabilities

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