The effect of synthetic conditions on tailoring the size of hydrotalcite particles

Jae Min Oh; Sung Ho Hwang; Jin Ho Choy

doi:10.1016/S0167-2738(02)00725-7

The effect of synthetic conditions on tailoring the size of hydrotalcite particles

Jae Min Oh, Sung Ho Hwang, Jin Ho Choy

Department of Energy and Materials Engineering

Seoul National University

Research output: Contribution to journal › Conference article › peer-review

303 Scopus citations

Abstract

The hydrotalcite particles of Mg₂Al(OH)₆(CO₃)_1/2·0.1H₂O have been prepared by two different methods: (1) direct coprecipitation of aqueous solution of Mg(NO₃)₂·6H₂O, Al(NO₃)₃·9H₂O upon hydrolysis of urea, and (2) hydrothermal aging of the same nitrate solution after NaOH titration. In order to control the particle size and morphology of hydrotalcite, various parameters such as metal ion concentration, aging time, reaction temperature are systematically studied. According to the powder X-ray diffraction, all the samples turn out to be well crystallized with an average basal spacing of 7.6 Å corresponding to the hydrotalcite crystal. From the SEM images, the coprecipitates are found to be hexagonal in shape and are controlled in the particle size range of 0.9-2.2 and 1.2-4.5 μm depending on aging time (6-69 h) and metal ion concentration (0.87-0.065 M), respectively. However, the particle size of the hydrothermally prepared samples increase in proportion to aging time (12-72 h ; 85-120 nm) and reaction temperature (100-180 °C; 115-340 nm). The effect of such parameters upon the particle size was rationalized on the basis of crystal growth mechanism.

Original language	English
Pages (from-to)	285-291
Number of pages	7
Journal	Solid State Ionics
Volume	151
Issue number	1-4
DOIs	https://doi.org/10.1016/S0167-2738(02)00725-7
State	Published - Nov 2002
Event	SSP- 2000 - Tokyo, Japan Duration: 11 Dec 2000 → 13 Dec 2000

Keywords

Crystal growth
Hydrotalcite
Particle size
Urea hydrolysis

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10.1016/S0167-2738(02)00725-7

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title = "The effect of synthetic conditions on tailoring the size of hydrotalcite particles",

abstract = "The hydrotalcite particles of Mg2Al(OH)6(CO3)1/2·0.1H2 O have been prepared by two different methods: (1) direct coprecipitation of aqueous solution of Mg(NO3)2·6H2O, Al(NO3)3·9H2O upon hydrolysis of urea, and (2) hydrothermal aging of the same nitrate solution after NaOH titration. In order to control the particle size and morphology of hydrotalcite, various parameters such as metal ion concentration, aging time, reaction temperature are systematically studied. According to the powder X-ray diffraction, all the samples turn out to be well crystallized with an average basal spacing of 7.6 {\AA} corresponding to the hydrotalcite crystal. From the SEM images, the coprecipitates are found to be hexagonal in shape and are controlled in the particle size range of 0.9-2.2 and 1.2-4.5 μm depending on aging time (6-69 h) and metal ion concentration (0.87-0.065 M), respectively. However, the particle size of the hydrothermally prepared samples increase in proportion to aging time (12-72 h ; 85-120 nm) and reaction temperature (100-180 °C; 115-340 nm). The effect of such parameters upon the particle size was rationalized on the basis of crystal growth mechanism.",

keywords = "Crystal growth, Hydrotalcite, Particle size, Urea hydrolysis",

author = "Oh, \{Jae Min\} and Hwang, \{Sung Ho\} and Choy, \{Jin Ho\}",

year = "2002",

month = nov,

doi = "10.1016/S0167-2738(02)00725-7",

language = "English",

volume = "151",

pages = "285--291",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

number = "1-4",

note = "SSP- 2000 ; Conference date: 11-12-2000 Through 13-12-2000",

}

TY - JOUR

T1 - The effect of synthetic conditions on tailoring the size of hydrotalcite particles

AU - Oh, Jae Min

AU - Hwang, Sung Ho

AU - Choy, Jin Ho

PY - 2002/11

Y1 - 2002/11

N2 - The hydrotalcite particles of Mg2Al(OH)6(CO3)1/2·0.1H2 O have been prepared by two different methods: (1) direct coprecipitation of aqueous solution of Mg(NO3)2·6H2O, Al(NO3)3·9H2O upon hydrolysis of urea, and (2) hydrothermal aging of the same nitrate solution after NaOH titration. In order to control the particle size and morphology of hydrotalcite, various parameters such as metal ion concentration, aging time, reaction temperature are systematically studied. According to the powder X-ray diffraction, all the samples turn out to be well crystallized with an average basal spacing of 7.6 Å corresponding to the hydrotalcite crystal. From the SEM images, the coprecipitates are found to be hexagonal in shape and are controlled in the particle size range of 0.9-2.2 and 1.2-4.5 μm depending on aging time (6-69 h) and metal ion concentration (0.87-0.065 M), respectively. However, the particle size of the hydrothermally prepared samples increase in proportion to aging time (12-72 h ; 85-120 nm) and reaction temperature (100-180 °C; 115-340 nm). The effect of such parameters upon the particle size was rationalized on the basis of crystal growth mechanism.

AB - The hydrotalcite particles of Mg2Al(OH)6(CO3)1/2·0.1H2 O have been prepared by two different methods: (1) direct coprecipitation of aqueous solution of Mg(NO3)2·6H2O, Al(NO3)3·9H2O upon hydrolysis of urea, and (2) hydrothermal aging of the same nitrate solution after NaOH titration. In order to control the particle size and morphology of hydrotalcite, various parameters such as metal ion concentration, aging time, reaction temperature are systematically studied. According to the powder X-ray diffraction, all the samples turn out to be well crystallized with an average basal spacing of 7.6 Å corresponding to the hydrotalcite crystal. From the SEM images, the coprecipitates are found to be hexagonal in shape and are controlled in the particle size range of 0.9-2.2 and 1.2-4.5 μm depending on aging time (6-69 h) and metal ion concentration (0.87-0.065 M), respectively. However, the particle size of the hydrothermally prepared samples increase in proportion to aging time (12-72 h ; 85-120 nm) and reaction temperature (100-180 °C; 115-340 nm). The effect of such parameters upon the particle size was rationalized on the basis of crystal growth mechanism.

KW - Crystal growth

KW - Hydrotalcite

KW - Particle size

KW - Urea hydrolysis

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U2 - 10.1016/S0167-2738(02)00725-7

DO - 10.1016/S0167-2738(02)00725-7

M3 - Conference article

AN - SCOPUS:0036857978

SN - 0167-2738

VL - 151

SP - 285

EP - 291

JO - Solid State Ionics

JF - Solid State Ionics

IS - 1-4

T2 - SSP- 2000

Y2 - 11 December 2000 through 13 December 2000

ER -

The effect of synthetic conditions on tailoring the size of hydrotalcite particles

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