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Preparation of Hierarchical Porous S‐1/silica Monoliths by Steaming Crystallization
Author(s) -
Cheng Wenjing,
Tao Kai,
Wu Yanfei,
Li Xiaoying,
Liang Yunxiao
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201900223
Subject(s) - steaming , crystallization , materials science , chemical engineering , macropore , porosity , adsorption , nanoparticle , mesoporous silica , mesoporous material , fumed silica , nanotechnology , composite material , chemistry , organic chemistry , catalysis , food science , engineering
Silicalite‐1 (S‐1) nanoparticles (80∼200 nm) were controlled to grow on the silica nano‐film of macroporous silica monoliths (MSMs) in situ by crystallization of the silica xerogel under steaming. The MSMs not only improve the dispersibility and adsorption capacity of S‐1 nanoparticles due to their continuous pass‐through macropores, but also overcome the problem of separation difficulty by their monolithic character. The S‐1 nanoparticles strengthen the mechanical strength of MSMs by local thickening of the silica nano‐film. The mesopores etched on the silica nano‐film during crystallization under steaming give convenience for molecule transmission.