Preparation and Charactrization of Fibrous Crystals of Boron-containing MTW-type Zeolite
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摘要:
Fibrous crystals of boron-containing MTW-type zeolite have been hydrothermally synthesized in B2O3-SiO2-HF-H2O gel system at 170 ℃ in 20 to 28 d by using 1,4-diazabicyclo[2,2,2]octane (DABCO) and methylamine as the co-template, and characterized with XRD, SEM, TEM, HRTEM and SAED. The results of characterizations show that B atoms are incorporated into the zeolite framework as tetrahedron of B(Osi)4. The fibrous single crystals of 5-50 μm in length and 100-500 nm in width inter-grow along the c-axis of the zeolite, and the one dimension 12 oxygen ring channels are perpendicular to the fibber axis.