Generation of parallelepiped-shaped mesopores and structure transformation in highly stable ferrierite zeolite crystals by framework desilication in NaOH solution

Desilication and recrystallization of the highly stable low-silica NaK-form ferrierite were conducted by one-step hydrothermal treatment in sodium hydroxide solution containing cetyltrimethylammonium bromide, leading to the formation of homogeneously distributed parallelepiped-shaped mesopores, partial delamination of layered crystals and ultimately, formation of GIS and SOD zeolite phases, successively.382