Phase Transformation from Brucite to Highly Crystalline Layered Double Hydroxide through a Combined Dissolution-Reprecipitation and Substitution Mechanism

Jinseop Shin, Chan Ju Choi, Tae Hyun Kim, Jae Min Oh*

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Resumé

We propose the phase transformation of magnesium hydroxide (brucite) to magnesium-aluminum hydroxide (layered double hydroxide: LDH) utilizing solid state brucite and aqueous aluminum(III) as precursors in order to obtain highly crystalline and large-sized LDH. Under a hydrothermal reaction at 150 °C, the brucite was partially dissolved, and aqueous aluminum precipitated in the form of boehmite within 1.5 h. Then, the precipitated aluminum migrated into the brucite framework to transform the crystal phase of brucite to LDH within 2.3 h of reaction. Time-dependent X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy analyses showed the time-dependent evolution of LDH from brucite. The transformed LDH exhibited crystal growth along the ab-plane direction first followed by crystal growth along the c-axis. Quantitative analysis utilizing inductively coupled plasma-optical emission spectroscopy for both the solid part and supernatant confirmed that the phase transformation was mediated by both dissolution-reprecipitation and isomorphous substitution in the solid state. The solid-state magic angle spin nuclear magnetic resonance spectroscopy for 27Al indicated that the crystal growth of phase-transformed LDH was accompanied by local ordering around Al(III) in LDH.

OriginalsprogEngelsk
TidsskriftCrystal Growth and Design
Vol/bind18
Udgave nummer9
Sider (fra-til)5398-5405
ISSN1528-7483
DOI
StatusUdgivet - sep. 2018

Fingeraftryk

Magnesium Hydroxide
brucite
hydroxides
phase transformations
dissolving
Dissolution
Substitution reactions
Phase transitions
Crystal growth
substitutes
Crystalline materials
Aluminum
aluminum
Magnesium
Crystallization
crystal growth
solid state
Hydrated alumina
Optical emission spectroscopy
magnesium

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title = "Phase Transformation from Brucite to Highly Crystalline Layered Double Hydroxide through a Combined Dissolution-Reprecipitation and Substitution Mechanism",
abstract = "We propose the phase transformation of magnesium hydroxide (brucite) to magnesium-aluminum hydroxide (layered double hydroxide: LDH) utilizing solid state brucite and aqueous aluminum(III) as precursors in order to obtain highly crystalline and large-sized LDH. Under a hydrothermal reaction at 150 °C, the brucite was partially dissolved, and aqueous aluminum precipitated in the form of boehmite within 1.5 h. Then, the precipitated aluminum migrated into the brucite framework to transform the crystal phase of brucite to LDH within 2.3 h of reaction. Time-dependent X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy analyses showed the time-dependent evolution of LDH from brucite. The transformed LDH exhibited crystal growth along the ab-plane direction first followed by crystal growth along the c-axis. Quantitative analysis utilizing inductively coupled plasma-optical emission spectroscopy for both the solid part and supernatant confirmed that the phase transformation was mediated by both dissolution-reprecipitation and isomorphous substitution in the solid state. The solid-state magic angle spin nuclear magnetic resonance spectroscopy for 27Al indicated that the crystal growth of phase-transformed LDH was accompanied by local ordering around Al(III) in LDH.",
author = "Jinseop Shin and Choi, {Chan Ju} and Kim, {Tae Hyun} and Oh, {Jae Min}",
year = "2018",
month = "9",
doi = "10.1021/acs.cgd.8b00786",
language = "English",
volume = "18",
pages = "5398--5405",
journal = "Crystal Growth & Design",
issn = "1528-7483",
publisher = "American Chemical Society",
number = "9",

}

Phase Transformation from Brucite to Highly Crystalline Layered Double Hydroxide through a Combined Dissolution-Reprecipitation and Substitution Mechanism. / Shin, Jinseop; Choi, Chan Ju; Kim, Tae Hyun; Oh, Jae Min.

I: Crystal Growth and Design, Bind 18, Nr. 9, 09.2018, s. 5398-5405.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Phase Transformation from Brucite to Highly Crystalline Layered Double Hydroxide through a Combined Dissolution-Reprecipitation and Substitution Mechanism

AU - Shin, Jinseop

AU - Choi, Chan Ju

AU - Kim, Tae Hyun

AU - Oh, Jae Min

PY - 2018/9

Y1 - 2018/9

N2 - We propose the phase transformation of magnesium hydroxide (brucite) to magnesium-aluminum hydroxide (layered double hydroxide: LDH) utilizing solid state brucite and aqueous aluminum(III) as precursors in order to obtain highly crystalline and large-sized LDH. Under a hydrothermal reaction at 150 °C, the brucite was partially dissolved, and aqueous aluminum precipitated in the form of boehmite within 1.5 h. Then, the precipitated aluminum migrated into the brucite framework to transform the crystal phase of brucite to LDH within 2.3 h of reaction. Time-dependent X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy analyses showed the time-dependent evolution of LDH from brucite. The transformed LDH exhibited crystal growth along the ab-plane direction first followed by crystal growth along the c-axis. Quantitative analysis utilizing inductively coupled plasma-optical emission spectroscopy for both the solid part and supernatant confirmed that the phase transformation was mediated by both dissolution-reprecipitation and isomorphous substitution in the solid state. The solid-state magic angle spin nuclear magnetic resonance spectroscopy for 27Al indicated that the crystal growth of phase-transformed LDH was accompanied by local ordering around Al(III) in LDH.

AB - We propose the phase transformation of magnesium hydroxide (brucite) to magnesium-aluminum hydroxide (layered double hydroxide: LDH) utilizing solid state brucite and aqueous aluminum(III) as precursors in order to obtain highly crystalline and large-sized LDH. Under a hydrothermal reaction at 150 °C, the brucite was partially dissolved, and aqueous aluminum precipitated in the form of boehmite within 1.5 h. Then, the precipitated aluminum migrated into the brucite framework to transform the crystal phase of brucite to LDH within 2.3 h of reaction. Time-dependent X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy analyses showed the time-dependent evolution of LDH from brucite. The transformed LDH exhibited crystal growth along the ab-plane direction first followed by crystal growth along the c-axis. Quantitative analysis utilizing inductively coupled plasma-optical emission spectroscopy for both the solid part and supernatant confirmed that the phase transformation was mediated by both dissolution-reprecipitation and isomorphous substitution in the solid state. The solid-state magic angle spin nuclear magnetic resonance spectroscopy for 27Al indicated that the crystal growth of phase-transformed LDH was accompanied by local ordering around Al(III) in LDH.

U2 - 10.1021/acs.cgd.8b00786

DO - 10.1021/acs.cgd.8b00786

M3 - Journal article

VL - 18

SP - 5398

EP - 5405

JO - Crystal Growth & Design

JF - Crystal Growth & Design

SN - 1528-7483

IS - 9

ER -