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Keywords:

  • silica;
  • sonication;
  • uniform layers;
  • X-ray diffraction;
  • zeolites
Thumbnail image of graphical abstract

Discrimination against the majority: The broad size distribution of conventional near-cubic Si-CHA (all-silica chabazite) zeolites impedes the formation of a close-packed layer, which is critical for the manufacture of zeolite films by secondary growth. Although present in lower abundance, platelike Si-CHA particles cosynthesized with near-cubic particles were deposited selectively on an α-Al2O3 disk to form a uniform layer.