Tailoring the Pore Sizes of Microporous Pillared Interlayered Clays through Layer Charge Reduction

Tailoring the Pore Sizes of Microporous Pillared Interlayered Clays through Layer Charge Reduction

A F-rich potassium hectorite, [K0.48(2)]inter[Mg2.54(8)Li0.43]oct[Si4]tetO10F2, with a layer charge of x = 0.48 per formula unit (pfu) was synthesized by high temperature melt synthesis. After Mg-exchange, the layer charge could be reduced significantly post synthesis by annealing (250 °C) as confir...

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Veröffentlicht in:Langmuir 2012-10, Vol.28 (41), p.14713-14719
Hauptverfasser: Herling, Markus M, Kalo, Hussein, Seibt, Sebastian, Schobert, Rainer, Breu, Josef
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Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porous materials
Surface physical chemistry
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container_end_page 14719
container_issue 41
container_start_page 14713
container_title Langmuir
container_volume 28
creator Herling, Markus M
Kalo, Hussein
Seibt, Sebastian
Schobert, Rainer
Breu, Josef
description A F-rich potassium hectorite, [K0.48(2)]inter[Mg2.54(8)Li0.43]oct[Si4]tetO10F2, with a layer charge of x = 0.48 per formula unit (pfu) was synthesized by high temperature melt synthesis. After Mg-exchange, the layer charge could be reduced significantly post synthesis by annealing (250 °C) as confirmed by alkylammonium exchange and cation exchange capacity. By pillaring this new low charge material with Me2DABCO2+ (N,N-dimethyl-1,1-diazabicyclo [2.2.2]octane dication) and Rh(bpy)3 3+ (rhodium-tris-2,2′-bipyridin trication), we observed a remarkable increase in micropore volume and pore diameter by Ar/Ar(l) physisorption measurements. This method allows the tailoring of pore sizes of pillared clays by reducing the layer charge and consequently the pillar density.
doi_str_mv 10.1021/la303573e
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subjects Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porous materials
Surface physical chemistry
title Tailoring the Pore Sizes of Microporous Pillared Interlayered Clays through Layer Charge Reduction
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