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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Published in | Langmuir Vol. 28; no. 41; pp. 14713 - 14719 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
16.10.2012
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Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0743-7463 1520-5827 |
DOI: | 10.1021/la303573e |