Zr K-edge XAS study on ZrO2-pillared aluminosilicate

摘要: The ZrO2-pillared clay with high acidic property has been prepared by reacting 1 wt% colloidal suspension of Na+-montmorillonite N aqueous solution ZrOCl2·8H2O and subsequent heating. evolution local structure around zirconium the intercalant stabilized in-between aluminosilicate layers upon intercalating, drying, pillaring condition systematically studied X-ray absorption spectroscopy, compared to those reference compounds such as ZrO2, ZrOCl2 · 8H2O its solution. intercalated species was identified Zr-tetramer, [Zr4(OH)14(H2O)10]2+, an average molecular volume 10 × A2 a thickness 4.5 A. Also it becomes more condensed drying eventually transforms oxide pillar calcination.