Abstract

Using the high siliceous zeolite Y crystals (ZY-C) as precursor, zeolite Y nanosheets (ZY-N) with hierarchical perfoliate pores were successfully synthesised via a simple ‘top-down’ approach. The ultra-thin faujasite nanosheets with intact zeolite Y framework and hierarchical micro-meso-macropores were first observed in ZY-N during characterisation. Contrary to the layer assembly process in growing zeolite Y crystals, the breakage and swelling of the energy-poor T–O–T (where T is the tetrahedral atom, Si) bonds within the double six-membered rings (D6R) between the neighbouring faujasite sheets demonstrated the possible principle for the synthesis of ZY-N.

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