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Title: Synthesis, structure refinement and chromate sorption characteristics of an Al-rich bayerite-based layered double hydroxide

Abstract

“Imbibition” of Zn{sup 2+} ions into the cation vacancies of bayerite–Al(OH){sub 3} and NO{sub 3}{sup −} ions into the interlayer gallery yields an Al-rich layered double hydroxide with Al/Zn ratio ∼3. NO{sub 3}{sup −} ions are intercalated with their molecular planes inclined at an angle to the plane of the metal hydroxide slab and bonded to it by hydrogen bonds. Rietveld refinement of the structure shows that the monoclinic symmetry of the precursor bayerite is preserved in the product, showing that the imbibition is topochemical in nature. The nitrate ion is labile and is quantitatively replaced by CrO{sub 4}{sup 2−} ions from solution. The uptake of CrO{sub 4}{sup 2−} ions follows a Langmuir adsorption isotherm, thus showing that the hydroxide is a candidate material for green chemistry applications for the removal of CrO{sub 4}{sup 2−} ions from waste water. Rietveld refinement of the structure of the hydroxide after CrO{sub 4}{sup 2−} inclusion reveals that the CrO{sub 4}{sup 2−} ion is intercalated with one of its 2-fold axes parallel to the b-crystallographic axis of the crystal, also the principal 2 axis of the monoclinic cell. - Graphical abstract: The structure of the [Zn–Al4-nitrate] LDH viewed along the a-axis. - Highlights: •more » Synthesis of Al-rich layered double hydroxide with Al/Zn ratio ∼3. • Rietveld refinement indicates that the imbibition of Zn into Al(OH){sub 3} is topochemical in nature. • The uptake of CrO{sub 4}{sup 2−} ions follows a Langmuir adsorption isotherm.« less

Authors:
;
Publication Date:
OSTI Identifier:
22334283
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 215; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADSORPTION ISOTHERMS; ALUMINIUM HYDROXIDES; CATIONS; CLATHRATES; CRYSTALS; INCLUSIONS; MONOCLINIC LATTICES; REMOVAL; SORPTION; SYNTHESIS; WASTE WATER; ZINC IONS

Citation Formats

Britto, Sylvia, and Kamath, P. Vishnu. Synthesis, structure refinement and chromate sorption characteristics of an Al-rich bayerite-based layered double hydroxide. United States: N. p., 2014. Web. doi:10.1016/J.JSSC.2014.02.031.
Britto, Sylvia, & Kamath, P. Vishnu. Synthesis, structure refinement and chromate sorption characteristics of an Al-rich bayerite-based layered double hydroxide. United States. https://doi.org/10.1016/J.JSSC.2014.02.031
Britto, Sylvia, and Kamath, P. Vishnu. 2014. "Synthesis, structure refinement and chromate sorption characteristics of an Al-rich bayerite-based layered double hydroxide". United States. https://doi.org/10.1016/J.JSSC.2014.02.031.
@article{osti_22334283,
title = {Synthesis, structure refinement and chromate sorption characteristics of an Al-rich bayerite-based layered double hydroxide},
author = {Britto, Sylvia and Kamath, P. Vishnu},
abstractNote = {“Imbibition” of Zn{sup 2+} ions into the cation vacancies of bayerite–Al(OH){sub 3} and NO{sub 3}{sup −} ions into the interlayer gallery yields an Al-rich layered double hydroxide with Al/Zn ratio ∼3. NO{sub 3}{sup −} ions are intercalated with their molecular planes inclined at an angle to the plane of the metal hydroxide slab and bonded to it by hydrogen bonds. Rietveld refinement of the structure shows that the monoclinic symmetry of the precursor bayerite is preserved in the product, showing that the imbibition is topochemical in nature. The nitrate ion is labile and is quantitatively replaced by CrO{sub 4}{sup 2−} ions from solution. The uptake of CrO{sub 4}{sup 2−} ions follows a Langmuir adsorption isotherm, thus showing that the hydroxide is a candidate material for green chemistry applications for the removal of CrO{sub 4}{sup 2−} ions from waste water. Rietveld refinement of the structure of the hydroxide after CrO{sub 4}{sup 2−} inclusion reveals that the CrO{sub 4}{sup 2−} ion is intercalated with one of its 2-fold axes parallel to the b-crystallographic axis of the crystal, also the principal 2 axis of the monoclinic cell. - Graphical abstract: The structure of the [Zn–Al4-nitrate] LDH viewed along the a-axis. - Highlights: • Synthesis of Al-rich layered double hydroxide with Al/Zn ratio ∼3. • Rietveld refinement indicates that the imbibition of Zn into Al(OH){sub 3} is topochemical in nature. • The uptake of CrO{sub 4}{sup 2−} ions follows a Langmuir adsorption isotherm.},
doi = {10.1016/J.JSSC.2014.02.031},
url = {https://www.osti.gov/biblio/22334283}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 215,
place = {United States},
year = {Tue Jul 01 00:00:00 EDT 2014},
month = {Tue Jul 01 00:00:00 EDT 2014}
}