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Preparation and Charactrization of Fibrous Crystals of Boron‐containing MTW‐type Zeolite
Author(s) -
Song MaoYing,
Zhou WeiZheng,
Long YingCai
Publication year - 2004
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20040220202
Subject(s) - chemistry , zeolite , dabco , methylamine , selected area diffraction , crystallography , octane , boron , high resolution transmission electron microscopy , ring (chemistry) , hydrothermal synthesis , piperazine , hydrothermal circulation , nanotechnology , chemical engineering , organic chemistry , transmission electron microscopy , catalysis , materials science , engineering
Fibrous crystals of boron‐containing MTW‐type zeolite have been hydrothermally synthesized in B 2 O 3 ‐SiO 2 ‐HF‐H 2 O gel system at 170 °C 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.