| Issue |
Korean Journal of Chemical Engineering,
Vol.10, No.2, 93-99, 1993
Vol.10, No.2, 93-99, 1993
ZIRCONIUM PHOSPHONATES LAYERED STRUCTURE CATALYSTS WITH ORGANIC ACID PENDANTS 1. PREPARATION AND PHYSICAL PROPERTIES
Zirconium phosphonates layered structure （ZPLS） materials with various organic pendant groups have been synthesized. Their physical properties were investigated by means of SEM, BET, XRD, TGA/DTA and FT-IR. These properties, crystallinity in particular, depended strongly on preparation conditions and the nature of the pendant. In general, samples with a sulfonic acid pendant were not as crystalline as the carboxylic acid analogs. Crystalline samples exhibited a plate-like morphology as commonly observed for layered structure materials. Interlayer spacing of these materials was roughly proportional to the size of the pendant. In comparison with a conventional cation exchanged resin (Amberlyst 15), the layered structures with a sulfonic acid pendant showed similar IR characteristics, but much better thermal stability.
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