Layered metal hydroxides containing calcium and their structural analysis

Tae Hyun Kim; Il Heo; Seung Min Paek; Chung Berm Park; Ae Jin Choi; Sung Han Lee; Jin Ho Choy; Jae Min Oh

doi:10.5012/bkcs.2012.33.6.1845

Layered metal hydroxides containing calcium and their structural analysis

Tae Hyun Kim, Il Heo, Seung Min Paek, Chung Berm Park, Ae Jin Choi, Sung Han Lee, Jin Ho Choy, Jae Min Oh

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

20 Scopus citations

Abstract

Layered metal hydroxides (LMHs) containing calcium were synthesized by coprecipitation in solution having two different trivalent metal ions, iron and aluminum. Two mixed metal solutions (Ca ²⁺/Al ³⁺ and Ca ²⁺/Fe ³⁺ = 2/1) were added to sodium hydroxide solution and the final pH was adjusted to ∼11.5 and ∼13 for CaAl-and CaFe-LMHs. Powder X-ray diffraction (XRD) for the two LMH samples showed well developed (00l) diffractions indicating 2-dimensional crystal structure of the synthesized LMHs. Rietveld refinement of the Xray diffraction pattern, the local structure analysis through X-ray absorption spectroscopy, and thermal analysis also confirmed that the synthesized precipitates show typical structure of LMHs. The chemical formulae, Ca _2.04Al ₁(OH) ₆(NO ₃)· _5.25H ₂O and Ca _2.01Fe ₁(OH) ₆(NO ₃)· _4.75H ₂O were determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). Particle morphology and thermal behavior for the synthesized LMHs were examined by field emission scanning electron microscopy and thermogravimetricdifferential scanning calorimetry.

Original language	English
Pages (from-to)	1845-1850
Number of pages	6
Journal	Bulletin of the Korean Chemical Society
Volume	33
Issue number	6
DOIs	https://doi.org/10.5012/bkcs.2012.33.6.1845
State	Published - 20 Jun 2012

Keywords

Hydrocalumite
Layered metal hydroxide
Rietvled refinement
X-ray absorption spectroscopy
X-ray diffraction

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10.5012/bkcs.2012.33.6.1845

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title = "Layered metal hydroxides containing calcium and their structural analysis",

abstract = "Layered metal hydroxides (LMHs) containing calcium were synthesized by coprecipitation in solution having two different trivalent metal ions, iron and aluminum. Two mixed metal solutions (Ca 2+/Al 3+ and Ca 2+/Fe 3+ = 2/1) were added to sodium hydroxide solution and the final pH was adjusted to ∼11.5 and ∼13 for CaAl-and CaFe-LMHs. Powder X-ray diffraction (XRD) for the two LMH samples showed well developed (00l) diffractions indicating 2-dimensional crystal structure of the synthesized LMHs. Rietveld refinement of the Xray diffraction pattern, the local structure analysis through X-ray absorption spectroscopy, and thermal analysis also confirmed that the synthesized precipitates show typical structure of LMHs. The chemical formulae, Ca 2.04Al 1(OH) 6(NO 3)· 5.25H 2O and Ca 2.01Fe 1(OH) 6(NO 3)· 4.75H 2O were determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). Particle morphology and thermal behavior for the synthesized LMHs were examined by field emission scanning electron microscopy and thermogravimetricdifferential scanning calorimetry.",

keywords = "Hydrocalumite, Layered metal hydroxide, Rietvled refinement, X-ray absorption spectroscopy, X-ray diffraction",

author = "Kim, {Tae Hyun} and Il Heo and Paek, {Seung Min} and Park, {Chung Berm} and Choi, {Ae Jin} and Lee, {Sung Han} and Choy, {Jin Ho} and Oh, {Jae Min}",

year = "2012",

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doi = "10.5012/bkcs.2012.33.6.1845",

language = "English",

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T1 - Layered metal hydroxides containing calcium and their structural analysis

AU - Kim, Tae Hyun

AU - Heo, Il

AU - Paek, Seung Min

AU - Park, Chung Berm

AU - Choi, Ae Jin

AU - Lee, Sung Han

AU - Choy, Jin Ho

AU - Oh, Jae Min

PY - 2012/6/20

Y1 - 2012/6/20

N2 - Layered metal hydroxides (LMHs) containing calcium were synthesized by coprecipitation in solution having two different trivalent metal ions, iron and aluminum. Two mixed metal solutions (Ca 2+/Al 3+ and Ca 2+/Fe 3+ = 2/1) were added to sodium hydroxide solution and the final pH was adjusted to ∼11.5 and ∼13 for CaAl-and CaFe-LMHs. Powder X-ray diffraction (XRD) for the two LMH samples showed well developed (00l) diffractions indicating 2-dimensional crystal structure of the synthesized LMHs. Rietveld refinement of the Xray diffraction pattern, the local structure analysis through X-ray absorption spectroscopy, and thermal analysis also confirmed that the synthesized precipitates show typical structure of LMHs. The chemical formulae, Ca 2.04Al 1(OH) 6(NO 3)· 5.25H 2O and Ca 2.01Fe 1(OH) 6(NO 3)· 4.75H 2O were determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). Particle morphology and thermal behavior for the synthesized LMHs were examined by field emission scanning electron microscopy and thermogravimetricdifferential scanning calorimetry.

AB - Layered metal hydroxides (LMHs) containing calcium were synthesized by coprecipitation in solution having two different trivalent metal ions, iron and aluminum. Two mixed metal solutions (Ca 2+/Al 3+ and Ca 2+/Fe 3+ = 2/1) were added to sodium hydroxide solution and the final pH was adjusted to ∼11.5 and ∼13 for CaAl-and CaFe-LMHs. Powder X-ray diffraction (XRD) for the two LMH samples showed well developed (00l) diffractions indicating 2-dimensional crystal structure of the synthesized LMHs. Rietveld refinement of the Xray diffraction pattern, the local structure analysis through X-ray absorption spectroscopy, and thermal analysis also confirmed that the synthesized precipitates show typical structure of LMHs. The chemical formulae, Ca 2.04Al 1(OH) 6(NO 3)· 5.25H 2O and Ca 2.01Fe 1(OH) 6(NO 3)· 4.75H 2O were determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). Particle morphology and thermal behavior for the synthesized LMHs were examined by field emission scanning electron microscopy and thermogravimetricdifferential scanning calorimetry.

KW - Hydrocalumite

KW - Layered metal hydroxide

KW - Rietvled refinement

KW - X-ray absorption spectroscopy

KW - X-ray diffraction

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SP - 1845

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JO - Bulletin of the Korean Chemical Society

JF - Bulletin of the Korean Chemical Society

IS - 6

ER -

Layered metal hydroxides containing calcium and their structural analysis

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Keywords

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