Highly efficient iodine capture by layered double hydroxides intercalated with polysulfides

Shulan Ma, Saiful M. Islam, Yurina Shim, Qingyang Gu, Pengli Wang, Hao Li, Genban Sun, Xiaojing Yang, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

We demonstrate strong iodine (I2) vapor adsorption using Mg/Al layered double hydroxide (MgAl-LDH) nanocomposites intercalated with polysulfide (Sx2-) groups (Sx-LDH, x = 2, 4, 6). The as-prepared LDH/polysulfide hybrid materials display highly efficient iodine capture resulting from the reducing property of the intercalated polysulfides. During adsorption, the I2 molecules are reduced to I3- anions by the intercalated [Sx]2- groups that simultaneously are oxidized to form S8. In addition to the chemical adsorption, additional molecular I2 is physically captured by the LDH composites. As a result of these parallel processes, and despite their very low BET surface areas, the iodine capture capacities of S2-LDH, S4-LDH, and S6-LDH are 1.32, 1.52, and 1.43 g/g, respectively, with a maximum adsorption of 152% (wt %). Thermogravimetric and differential thermal analysis (TG-DTA), energy dispersive X-ray spectroscopy (EDS), and temperature-variable powder X-ray diffraction (XRD) measurements show the resulting I3- ions that intercalated into the LDH gallery have high thermal stability (¥350 °C). The excellent iodine adsorption performance combined with the facile preparation points to the Sx-LDH systems as potential superior materials for adsorption of radioactive iodine, a waste product of the nuclear power industry.

Original languageEnglish
Pages (from-to)7114-7123
Number of pages10
JournalChemistry of Materials
Volume26
Issue number24
DOIs
Publication statusPublished - Dec 23 2014

Fingerprint

Hydroxides
Polysulfides
Iodine
Adsorption
Hybrid materials
Nuclear energy
X ray powder diffraction
Differential thermal analysis
Anions
polysulfide
Energy dispersive spectroscopy
Nanocomposites
Thermodynamic stability
Negative ions
Vapors
Ions
Molecules
Composite materials

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Highly efficient iodine capture by layered double hydroxides intercalated with polysulfides. / Ma, Shulan; Islam, Saiful M.; Shim, Yurina; Gu, Qingyang; Wang, Pengli; Li, Hao; Sun, Genban; Yang, Xiaojing; Kanatzidis, Mercouri G.

In: Chemistry of Materials, Vol. 26, No. 24, 23.12.2014, p. 7114-7123.

Research output: Contribution to journalArticle

Ma, S, Islam, SM, Shim, Y, Gu, Q, Wang, P, Li, H, Sun, G, Yang, X & Kanatzidis, MG 2014, 'Highly efficient iodine capture by layered double hydroxides intercalated with polysulfides', Chemistry of Materials, vol. 26, no. 24, pp. 7114-7123. https://doi.org/10.1021/cm5036997
Ma, Shulan ; Islam, Saiful M. ; Shim, Yurina ; Gu, Qingyang ; Wang, Pengli ; Li, Hao ; Sun, Genban ; Yang, Xiaojing ; Kanatzidis, Mercouri G. / Highly efficient iodine capture by layered double hydroxides intercalated with polysulfides. In: Chemistry of Materials. 2014 ; Vol. 26, No. 24. pp. 7114-7123.
@article{a9a9b74d60e04320b10c8b7f7f504e4d,
title = "Highly efficient iodine capture by layered double hydroxides intercalated with polysulfides",
abstract = "We demonstrate strong iodine (I2) vapor adsorption using Mg/Al layered double hydroxide (MgAl-LDH) nanocomposites intercalated with polysulfide (Sx2-) groups (Sx-LDH, x = 2, 4, 6). The as-prepared LDH/polysulfide hybrid materials display highly efficient iodine capture resulting from the reducing property of the intercalated polysulfides. During adsorption, the I2 molecules are reduced to I3- anions by the intercalated [Sx]2- groups that simultaneously are oxidized to form S8. In addition to the chemical adsorption, additional molecular I2 is physically captured by the LDH composites. As a result of these parallel processes, and despite their very low BET surface areas, the iodine capture capacities of S2-LDH, S4-LDH, and S6-LDH are 1.32, 1.52, and 1.43 g/g, respectively, with a maximum adsorption of 152{\%} (wt {\%}). Thermogravimetric and differential thermal analysis (TG-DTA), energy dispersive X-ray spectroscopy (EDS), and temperature-variable powder X-ray diffraction (XRD) measurements show the resulting I3- ions that intercalated into the LDH gallery have high thermal stability (¥350 °C). The excellent iodine adsorption performance combined with the facile preparation points to the Sx-LDH systems as potential superior materials for adsorption of radioactive iodine, a waste product of the nuclear power industry.",
author = "Shulan Ma and Islam, {Saiful M.} and Yurina Shim and Qingyang Gu and Pengli Wang and Hao Li and Genban Sun and Xiaojing Yang and Kanatzidis, {Mercouri G}",
year = "2014",
month = "12",
day = "23",
doi = "10.1021/cm5036997",
language = "English",
volume = "26",
pages = "7114--7123",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "24",

}

TY - JOUR

T1 - Highly efficient iodine capture by layered double hydroxides intercalated with polysulfides

AU - Ma, Shulan

AU - Islam, Saiful M.

AU - Shim, Yurina

AU - Gu, Qingyang

AU - Wang, Pengli

AU - Li, Hao

AU - Sun, Genban

AU - Yang, Xiaojing

AU - Kanatzidis, Mercouri G

PY - 2014/12/23

Y1 - 2014/12/23

N2 - We demonstrate strong iodine (I2) vapor adsorption using Mg/Al layered double hydroxide (MgAl-LDH) nanocomposites intercalated with polysulfide (Sx2-) groups (Sx-LDH, x = 2, 4, 6). The as-prepared LDH/polysulfide hybrid materials display highly efficient iodine capture resulting from the reducing property of the intercalated polysulfides. During adsorption, the I2 molecules are reduced to I3- anions by the intercalated [Sx]2- groups that simultaneously are oxidized to form S8. In addition to the chemical adsorption, additional molecular I2 is physically captured by the LDH composites. As a result of these parallel processes, and despite their very low BET surface areas, the iodine capture capacities of S2-LDH, S4-LDH, and S6-LDH are 1.32, 1.52, and 1.43 g/g, respectively, with a maximum adsorption of 152% (wt %). Thermogravimetric and differential thermal analysis (TG-DTA), energy dispersive X-ray spectroscopy (EDS), and temperature-variable powder X-ray diffraction (XRD) measurements show the resulting I3- ions that intercalated into the LDH gallery have high thermal stability (¥350 °C). The excellent iodine adsorption performance combined with the facile preparation points to the Sx-LDH systems as potential superior materials for adsorption of radioactive iodine, a waste product of the nuclear power industry.

AB - We demonstrate strong iodine (I2) vapor adsorption using Mg/Al layered double hydroxide (MgAl-LDH) nanocomposites intercalated with polysulfide (Sx2-) groups (Sx-LDH, x = 2, 4, 6). The as-prepared LDH/polysulfide hybrid materials display highly efficient iodine capture resulting from the reducing property of the intercalated polysulfides. During adsorption, the I2 molecules are reduced to I3- anions by the intercalated [Sx]2- groups that simultaneously are oxidized to form S8. In addition to the chemical adsorption, additional molecular I2 is physically captured by the LDH composites. As a result of these parallel processes, and despite their very low BET surface areas, the iodine capture capacities of S2-LDH, S4-LDH, and S6-LDH are 1.32, 1.52, and 1.43 g/g, respectively, with a maximum adsorption of 152% (wt %). Thermogravimetric and differential thermal analysis (TG-DTA), energy dispersive X-ray spectroscopy (EDS), and temperature-variable powder X-ray diffraction (XRD) measurements show the resulting I3- ions that intercalated into the LDH gallery have high thermal stability (¥350 °C). The excellent iodine adsorption performance combined with the facile preparation points to the Sx-LDH systems as potential superior materials for adsorption of radioactive iodine, a waste product of the nuclear power industry.

UR - http://www.scopus.com/inward/record.url?scp=84919754048&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84919754048&partnerID=8YFLogxK

U2 - 10.1021/cm5036997

DO - 10.1021/cm5036997

M3 - Article

VL - 26

SP - 7114

EP - 7123

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 24

ER -