The first study on the synthesis of uniform SUZ-4 zeolite nanofiber

Uniform SUZ-4 zeolite nanofiber (about 12 × 1500 nm) was obtained for the first time. The SUZ-4 zeolite was synthesized by hydrothermal treatment of the initial aluminosilicate gel at 150 °C with the assistance of definite amount of special seed slurry while without additional use of template. It was found that morphology of the SUZ-4 zeolite synthesized can be simply controlled by the character of seed slurry that is mainly determined by the crystallization period in preparation. The seed slurry containing plenty of less stable SUZ-4 crystallites obtained by crystallizing the aluminosilicate gel (7.9 KOH:1.0 Al2O3:2.6 TEAOH:21.2 SiO2:498.6 H2O) under rotation at 150 °C for 16 h leads to the synthesis of nanofibrous SUZ-4, while that primarily containing stable SUZ-4 crystallites obtained by prolonged crystallization period leads to the synthesis of rod-like zeolite.

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► SUZ-4 zeolite with uniform nanofiber morphology was synthesized for the first time.
► Pure SUZ-4 zeolite was synthesized without using additional template.
► The morphology was successfully controlled in the SUZ-4 synthesis.
► The mechanism concerning the formation of SUZ-4 zeolite nanofiber was proposed.