Chalcogenide aerogels as sorbents for noble gases (Xe, Kr)

Kota S. Subrahmanyam, Ioannis Spanopoulos, Jaehun Chun, Brian J. Riley, Praveen K. Thallapally, Pantelis N. Trikalitis, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

High-surface-area molybdenum sulfide (MoSx) and antimony sulfide (SbSx) chalcogels were studied for Xe/Kr gas separation. The intrinsic soft Lewis basic character of the chalcogel framework is a unique property among the large family of porous materials and lends itself to a potential new approach toward the selective separation of Xe over Kr. Among these chalcogels, MoSx shows the highest Xe and Kr uptake, reaching 0.69 mmol g-1 (1.05 mmol cm-3) and 0.28 mmol g-1 (0.42 mmol cm-3) respectively, at 273 K and 1 bar. The corresponding isosteric heat of adsorption at zero coverage (Qst 0) is 22.8 and 18.6 kJ mol-1 and both are the highest among the selected chalcogels. The IAST (10:90) Xe/Kr selectivity at 273 K for MoSx is 6.0, whereas for SbSx chalcogels, it varies in the range 2.0-2.8. The higher formal charge of molybdenum, Mo4+, in MoSx versus that of antimony, Sb3+, in SbSx coupled with its larger atomic size could induce higher polarizability in the MoSx framework and therefore higher Xe/Kr selectivity.

Original languageEnglish
Pages (from-to)33389-33394
Number of pages6
JournalACS Applied Materials and Interfaces
Volume9
Issue number39
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

Noble Gases
Antimony
Aerogels
Inert gases
Sorbents
Molybdenum
Sulfides
Porous materials
Gases
Adsorption
molybdenum disulfide
Hot Temperature

Keywords

  • Aerogels
  • Chalcogenide
  • Nuclear remediation
  • Porous materials

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Subrahmanyam, K. S., Spanopoulos, I., Chun, J., Riley, B. J., Thallapally, P. K., Trikalitis, P. N., & Kanatzidis, M. G. (2017). Chalcogenide aerogels as sorbents for noble gases (Xe, Kr). ACS Applied Materials and Interfaces, 9(39), 33389-33394. https://doi.org/10.1021/acsami.6b15896

Chalcogenide aerogels as sorbents for noble gases (Xe, Kr). / Subrahmanyam, Kota S.; Spanopoulos, Ioannis; Chun, Jaehun; Riley, Brian J.; Thallapally, Praveen K.; Trikalitis, Pantelis N.; Kanatzidis, Mercouri G.

In: ACS Applied Materials and Interfaces, Vol. 9, No. 39, 01.01.2017, p. 33389-33394.

Research output: Contribution to journalArticle

Subrahmanyam, KS, Spanopoulos, I, Chun, J, Riley, BJ, Thallapally, PK, Trikalitis, PN & Kanatzidis, MG 2017, 'Chalcogenide aerogels as sorbents for noble gases (Xe, Kr)', ACS Applied Materials and Interfaces, vol. 9, no. 39, pp. 33389-33394. https://doi.org/10.1021/acsami.6b15896
Subrahmanyam KS, Spanopoulos I, Chun J, Riley BJ, Thallapally PK, Trikalitis PN et al. Chalcogenide aerogels as sorbents for noble gases (Xe, Kr). ACS Applied Materials and Interfaces. 2017 Jan 1;9(39):33389-33394. https://doi.org/10.1021/acsami.6b15896
Subrahmanyam, Kota S. ; Spanopoulos, Ioannis ; Chun, Jaehun ; Riley, Brian J. ; Thallapally, Praveen K. ; Trikalitis, Pantelis N. ; Kanatzidis, Mercouri G. / Chalcogenide aerogels as sorbents for noble gases (Xe, Kr). In: ACS Applied Materials and Interfaces. 2017 ; Vol. 9, No. 39. pp. 33389-33394.
@article{5ce86524975c43258f55831c91321f13,
title = "Chalcogenide aerogels as sorbents for noble gases (Xe, Kr)",
abstract = "High-surface-area molybdenum sulfide (MoSx) and antimony sulfide (SbSx) chalcogels were studied for Xe/Kr gas separation. The intrinsic soft Lewis basic character of the chalcogel framework is a unique property among the large family of porous materials and lends itself to a potential new approach toward the selective separation of Xe over Kr. Among these chalcogels, MoSx shows the highest Xe and Kr uptake, reaching 0.69 mmol g-1 (1.05 mmol cm-3) and 0.28 mmol g-1 (0.42 mmol cm-3) respectively, at 273 K and 1 bar. The corresponding isosteric heat of adsorption at zero coverage (Qst 0) is 22.8 and 18.6 kJ mol-1 and both are the highest among the selected chalcogels. The IAST (10:90) Xe/Kr selectivity at 273 K for MoSx is 6.0, whereas for SbSx chalcogels, it varies in the range 2.0-2.8. The higher formal charge of molybdenum, Mo4+, in MoSx versus that of antimony, Sb3+, in SbSx coupled with its larger atomic size could induce higher polarizability in the MoSx framework and therefore higher Xe/Kr selectivity.",
keywords = "Aerogels, Chalcogenide, Nuclear remediation, Porous materials",
author = "Subrahmanyam, {Kota S.} and Ioannis Spanopoulos and Jaehun Chun and Riley, {Brian J.} and Thallapally, {Praveen K.} and Trikalitis, {Pantelis N.} and Kanatzidis, {Mercouri G}",
year = "2017",
month = "1",
day = "1",
doi = "10.1021/acsami.6b15896",
language = "English",
volume = "9",
pages = "33389--33394",
journal = "ACS applied materials & interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "39",

}

TY - JOUR

T1 - Chalcogenide aerogels as sorbents for noble gases (Xe, Kr)

AU - Subrahmanyam, Kota S.

AU - Spanopoulos, Ioannis

AU - Chun, Jaehun

AU - Riley, Brian J.

AU - Thallapally, Praveen K.

AU - Trikalitis, Pantelis N.

AU - Kanatzidis, Mercouri G

PY - 2017/1/1

Y1 - 2017/1/1

N2 - High-surface-area molybdenum sulfide (MoSx) and antimony sulfide (SbSx) chalcogels were studied for Xe/Kr gas separation. The intrinsic soft Lewis basic character of the chalcogel framework is a unique property among the large family of porous materials and lends itself to a potential new approach toward the selective separation of Xe over Kr. Among these chalcogels, MoSx shows the highest Xe and Kr uptake, reaching 0.69 mmol g-1 (1.05 mmol cm-3) and 0.28 mmol g-1 (0.42 mmol cm-3) respectively, at 273 K and 1 bar. The corresponding isosteric heat of adsorption at zero coverage (Qst 0) is 22.8 and 18.6 kJ mol-1 and both are the highest among the selected chalcogels. The IAST (10:90) Xe/Kr selectivity at 273 K for MoSx is 6.0, whereas for SbSx chalcogels, it varies in the range 2.0-2.8. The higher formal charge of molybdenum, Mo4+, in MoSx versus that of antimony, Sb3+, in SbSx coupled with its larger atomic size could induce higher polarizability in the MoSx framework and therefore higher Xe/Kr selectivity.

AB - High-surface-area molybdenum sulfide (MoSx) and antimony sulfide (SbSx) chalcogels were studied for Xe/Kr gas separation. The intrinsic soft Lewis basic character of the chalcogel framework is a unique property among the large family of porous materials and lends itself to a potential new approach toward the selective separation of Xe over Kr. Among these chalcogels, MoSx shows the highest Xe and Kr uptake, reaching 0.69 mmol g-1 (1.05 mmol cm-3) and 0.28 mmol g-1 (0.42 mmol cm-3) respectively, at 273 K and 1 bar. The corresponding isosteric heat of adsorption at zero coverage (Qst 0) is 22.8 and 18.6 kJ mol-1 and both are the highest among the selected chalcogels. The IAST (10:90) Xe/Kr selectivity at 273 K for MoSx is 6.0, whereas for SbSx chalcogels, it varies in the range 2.0-2.8. The higher formal charge of molybdenum, Mo4+, in MoSx versus that of antimony, Sb3+, in SbSx coupled with its larger atomic size could induce higher polarizability in the MoSx framework and therefore higher Xe/Kr selectivity.

KW - Aerogels

KW - Chalcogenide

KW - Nuclear remediation

KW - Porous materials

UR - http://www.scopus.com/inward/record.url?scp=85027723139&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85027723139&partnerID=8YFLogxK

U2 - 10.1021/acsami.6b15896

DO - 10.1021/acsami.6b15896

M3 - Article

VL - 9

SP - 33389

EP - 33394

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

SN - 1944-8244

IS - 39

ER -