Incorporation of monovalent cations in sulfate green rust

Bo C. Christiansen; Knud Dideriksen; Aurelian Katz; Sorin Nedel; Nicolas Emile Bovet; Henning Osholm Sørensen; Cathrine Frandsen; Carsten Gundlach; Martin Peter Andersson; Susan Louise Svane Stipp

doi:10.1021/ic500495a

Incorporation of monovalent cations in sulfate green rust

Bo C. Christiansen, Knud Dideriksen, Aurelian Katz, Sorin Nedel, Nicolas Emile Bovet, Henning Osholm Sørensen, Cathrine Frandsen, Carsten Gundlach, Martin Peter Andersson, Susan Louise Svane Stipp

16 Citationer (Scopus)

Abstract

Green rust is a naturally occurring layered mixed-valent ferrous-ferric hydroxide, which can react with a range of redox-active compounds. Sulfate-bearing green rust is generally thought to have interlayers composed of sulfate and water. Here, we provide evidence that the interlayers also contain monovalent cations, using X-ray photoelectron spectroscopy and synchrotron X-ray scattering. For material synthesized with Na⁺, K⁺, Rb⁺, or Cs⁺, interlayer thickness derived from basal plane spacings correlates with the radius of the monovalent cation. In addition, sequential washing of the materials with water showed that Na⁺ and K⁺ were structurally fixed in the interlayer, whereas Rb⁺ and Cs⁺ could be removed, resulting in a decrease in the basal layer spacing. The incorporation of cations in the interlayer opens up new possibilities for the use of sulfate green rust for exchange reactions with both anions and cations: e.g., radioactive Cs.

Originalsprog	Engelsk
Tidsskrift	Inorganic Chemistry
Vol/bind	53
Udgave nummer	17
Sider (fra-til)	8887−8894
Antal sider	8
ISSN	0020-1669
DOI	https://doi.org/10.1021/ic500495a
Status	Udgivet - 2 sep. 2014

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10.1021/ic500495a

Citationsformater

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title = "Incorporation of monovalent cations in sulfate green rust",

abstract = "Green rust is a naturally occurring layered mixed-valent ferrous-ferric hydroxide, which can react with a range of redox-active compounds. Sulfate-bearing green rust is generally thought to have interlayers composed of sulfate and water. Here, we provide evidence that the interlayers also contain monovalent cations, using X-ray photoelectron spectroscopy and synchrotron X-ray scattering. For material synthesized with Na+, K+, Rb+, or Cs+, interlayer thickness derived from basal plane spacings correlates with the radius of the monovalent cation. In addition, sequential washing of the materials with water showed that Na+ and K+ were structurally fixed in the interlayer, whereas Rb+ and Cs+ could be removed, resulting in a decrease in the basal layer spacing. The incorporation of cations in the interlayer opens up new possibilities for the use of sulfate green rust for exchange reactions with both anions and cations: e.g., radioactive Cs.",

author = "Christiansen, {Bo C.} and Knud Dideriksen and Aurelian Katz and Sorin Nedel and Bovet, {Nicolas Emile} and S{\o}rensen, {Henning Osholm} and Cathrine Frandsen and Carsten Gundlach and Andersson, {Martin Peter} and Stipp, {Susan Louise Svane}",

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doi = "10.1021/ic500495a",

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T1 - Incorporation of monovalent cations in sulfate green rust

AU - Christiansen, Bo C.

AU - Dideriksen, Knud

AU - Katz, Aurelian

AU - Nedel, Sorin

AU - Bovet, Nicolas Emile

AU - Sørensen, Henning Osholm

AU - Frandsen, Cathrine

AU - Gundlach, Carsten

AU - Andersson, Martin Peter

AU - Stipp, Susan Louise Svane

PY - 2014/9/2

Y1 - 2014/9/2

N2 - Green rust is a naturally occurring layered mixed-valent ferrous-ferric hydroxide, which can react with a range of redox-active compounds. Sulfate-bearing green rust is generally thought to have interlayers composed of sulfate and water. Here, we provide evidence that the interlayers also contain monovalent cations, using X-ray photoelectron spectroscopy and synchrotron X-ray scattering. For material synthesized with Na+, K+, Rb+, or Cs+, interlayer thickness derived from basal plane spacings correlates with the radius of the monovalent cation. In addition, sequential washing of the materials with water showed that Na+ and K+ were structurally fixed in the interlayer, whereas Rb+ and Cs+ could be removed, resulting in a decrease in the basal layer spacing. The incorporation of cations in the interlayer opens up new possibilities for the use of sulfate green rust for exchange reactions with both anions and cations: e.g., radioactive Cs.

AB - Green rust is a naturally occurring layered mixed-valent ferrous-ferric hydroxide, which can react with a range of redox-active compounds. Sulfate-bearing green rust is generally thought to have interlayers composed of sulfate and water. Here, we provide evidence that the interlayers also contain monovalent cations, using X-ray photoelectron spectroscopy and synchrotron X-ray scattering. For material synthesized with Na+, K+, Rb+, or Cs+, interlayer thickness derived from basal plane spacings correlates with the radius of the monovalent cation. In addition, sequential washing of the materials with water showed that Na+ and K+ were structurally fixed in the interlayer, whereas Rb+ and Cs+ could be removed, resulting in a decrease in the basal layer spacing. The incorporation of cations in the interlayer opens up new possibilities for the use of sulfate green rust for exchange reactions with both anions and cations: e.g., radioactive Cs.

U2 - 10.1021/ic500495a

DO - 10.1021/ic500495a

M3 - Journal article

C2 - 25144528

SN - 0020-1669

VL - 53

SP - 8887−8894

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 17

ER -

Incorporation of monovalent cations in sulfate green rust

Abstract

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