Layered silicate by proton exchange and swelling of AMH-3

Sunho Choi; Joaquin Coronas; Joshua A. Sheffel; Edgar Jordan; Weontae Oh; Sankar Nair; Daniel F. Shantz; Michael Tsapatsis

doi:10.1016/j.micromeso.2007.12.041

Layered silicate by proton exchange and swelling of AMH-3

Sunho Choi
, Joaquin Coronas
, Joshua A. Sheffel
, Edgar Jordan
, Weontae Oh
, Sankar Nair
, Daniel F. Shantz
, Michael Tsapatsis

Chemical Engineering and Materials Science

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

26 Scopus citations

Abstract

Proton-exchanged AMH-3 was prepared by ion exchange of interlayer cations of the layered silicate AMH-3 using an aqueous solution of amino acid. Moreover, swollen AMH-3 was prepared by a procedure involving sequential intercalation of primary amine molecules following proton exchange. Structural characteristics of both AMH-3 derivative materials were investigated using characterization techniques such as XRD, SEM, TEM, NMR, FT-IR, TGA, and N₂ adsorption. Both processes lead to structural changes and condensation of silanol groups located on the silicate layer surface. Proton-exchanged AMH-3 is an amorphous powder with the same particle size and shape as the original AMH-3 crystals. Due to the structural changes, swollen AMH-3 should be considered as a new layered silicate material rather than an intercalated phase. The swollen AMH-3 powder shows limited evidence for the presence of a nanoporous framework, suggesting that its use as a molecular sieve additive for improved selectivity nanocomposite membranes is worth exploring.

Original language	English (US)
Pages (from-to)	75-84
Number of pages	10
Journal	Microporous and Mesoporous Materials
Volume	115
Issue number	1-2
DOIs	https://doi.org/10.1016/j.micromeso.2007.12.041
State	Published - Oct 1 2008

Bibliographical note

Funding Information:
Funding for this work was provided mainly by NSF (CTS-0327811). Additional support was provided by DOE (DE-FG26-04NT42119) and Pall Corporation. Joaquin Coronas acknowledges support from the Spanish Ministry of Education (Programa de Estancias de Profesores de Universidad of the Dirección General de Universidades, PR2004-0478), Sankar Nair from NSF (CTS-0437621), and Daniel F. Shantz from the Petroleum Research Fund of the American Chemical Society (Award 43942-AC10). We gratefully acknowledge Sandeep Kumar in our group for the TEM images of swollen AMH-3 particles.

Keywords

Intercalation
Ion exchange
Layered silicate
Molecular sieve
Swelling

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10.1016/j.micromeso.2007.12.041

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title = "Layered silicate by proton exchange and swelling of AMH-3",

abstract = "Proton-exchanged AMH-3 was prepared by ion exchange of interlayer cations of the layered silicate AMH-3 using an aqueous solution of amino acid. Moreover, swollen AMH-3 was prepared by a procedure involving sequential intercalation of primary amine molecules following proton exchange. Structural characteristics of both AMH-3 derivative materials were investigated using characterization techniques such as XRD, SEM, TEM, NMR, FT-IR, TGA, and N2 adsorption. Both processes lead to structural changes and condensation of silanol groups located on the silicate layer surface. Proton-exchanged AMH-3 is an amorphous powder with the same particle size and shape as the original AMH-3 crystals. Due to the structural changes, swollen AMH-3 should be considered as a new layered silicate material rather than an intercalated phase. The swollen AMH-3 powder shows limited evidence for the presence of a nanoporous framework, suggesting that its use as a molecular sieve additive for improved selectivity nanocomposite membranes is worth exploring.",

keywords = "Intercalation, Ion exchange, Layered silicate, Molecular sieve, Swelling",

author = "Sunho Choi and Joaquin Coronas and Sheffel, \{Joshua A.\} and Edgar Jordan and Weontae Oh and Sankar Nair and Shantz, \{Daniel F.\} and Michael Tsapatsis",

note = "Funding Information: Funding for this work was provided mainly by NSF (CTS-0327811). Additional support was provided by DOE (DE-FG26-04NT42119) and Pall Corporation. Joaquin Coronas acknowledges support from the Spanish Ministry of Education (Programa de Estancias de Profesores de Universidad of the Direcci{\'o}n General de Universidades, PR2004-0478), Sankar Nair from NSF (CTS-0437621), and Daniel F. Shantz from the Petroleum Research Fund of the American Chemical Society (Award 43942-AC10). We gratefully acknowledge Sandeep Kumar in our group for the TEM images of swollen AMH-3 particles.",

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AU - Choi, Sunho

AU - Coronas, Joaquin

AU - Sheffel, Joshua A.

AU - Jordan, Edgar

AU - Oh, Weontae

AU - Nair, Sankar

AU - Shantz, Daniel F.

AU - Tsapatsis, Michael

N1 - Funding Information: Funding for this work was provided mainly by NSF (CTS-0327811). Additional support was provided by DOE (DE-FG26-04NT42119) and Pall Corporation. Joaquin Coronas acknowledges support from the Spanish Ministry of Education (Programa de Estancias de Profesores de Universidad of the Dirección General de Universidades, PR2004-0478), Sankar Nair from NSF (CTS-0437621), and Daniel F. Shantz from the Petroleum Research Fund of the American Chemical Society (Award 43942-AC10). We gratefully acknowledge Sandeep Kumar in our group for the TEM images of swollen AMH-3 particles.

PY - 2008/10/1

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N2 - Proton-exchanged AMH-3 was prepared by ion exchange of interlayer cations of the layered silicate AMH-3 using an aqueous solution of amino acid. Moreover, swollen AMH-3 was prepared by a procedure involving sequential intercalation of primary amine molecules following proton exchange. Structural characteristics of both AMH-3 derivative materials were investigated using characterization techniques such as XRD, SEM, TEM, NMR, FT-IR, TGA, and N2 adsorption. Both processes lead to structural changes and condensation of silanol groups located on the silicate layer surface. Proton-exchanged AMH-3 is an amorphous powder with the same particle size and shape as the original AMH-3 crystals. Due to the structural changes, swollen AMH-3 should be considered as a new layered silicate material rather than an intercalated phase. The swollen AMH-3 powder shows limited evidence for the presence of a nanoporous framework, suggesting that its use as a molecular sieve additive for improved selectivity nanocomposite membranes is worth exploring.

AB - Proton-exchanged AMH-3 was prepared by ion exchange of interlayer cations of the layered silicate AMH-3 using an aqueous solution of amino acid. Moreover, swollen AMH-3 was prepared by a procedure involving sequential intercalation of primary amine molecules following proton exchange. Structural characteristics of both AMH-3 derivative materials were investigated using characterization techniques such as XRD, SEM, TEM, NMR, FT-IR, TGA, and N2 adsorption. Both processes lead to structural changes and condensation of silanol groups located on the silicate layer surface. Proton-exchanged AMH-3 is an amorphous powder with the same particle size and shape as the original AMH-3 crystals. Due to the structural changes, swollen AMH-3 should be considered as a new layered silicate material rather than an intercalated phase. The swollen AMH-3 powder shows limited evidence for the presence of a nanoporous framework, suggesting that its use as a molecular sieve additive for improved selectivity nanocomposite membranes is worth exploring.

KW - Intercalation

KW - Ion exchange

KW - Layered silicate

KW - Molecular sieve

KW - Swelling

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ER -

Layered silicate by proton exchange and swelling of AMH-3

Abstract

Bibliographical note

Keywords

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