Premium
A Simple Route to Synthesize Mesoporous ZSM‐5 Templated by Ammonium‐Modified Chitosan
Author(s) -
Jin Junjiang,
Zhang Xingdi,
Li Yongsheng,
Li Hua,
Wu Wei,
Cui Yunlong,
Chen Qian,
Li Liang,
Gu Jinlou,
Zhao Wenru,
Shi Jianlin
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201201614
Subject(s) - mesoporous material , microporous material , ammonium hydroxide , zeolite , chitosan , chemical engineering , materials science , nanoreactor , zsm 5 , catalysis , benzaldehyde , hydrothermal circulation , chemistry , organic chemistry , engineering
Uniform mesoporous zeolite ZSM‐5 crystals have been successfully fabricated through a simple hydrothermal synthetic method by utilizing ammonium‐modified chitosan and tetrapropylammonium hydroxide (TPAOH) as the meso‐ and microscale template, respectively. It was revealed that mesopores with diameters of 5–20 nm coexisted with microporous network within mesoporous ZSM‐5 crystals. Ammonium‐modified chitosan was demonstrated to serve as a mesoporogen, self‐assembling with the zeolite precursor through strong static interactions. As expected, the prepared mesoporous ZSM‐5 exhibited greatly enhanced catalytic activities compared with conventional ZSM‐5 and Al‐MCM‐41 in reactions involving bulky molecules, such as the Claisen–Schmidt condensation of 2‐hydroxyacetophenone with benzaldehyde and the esterification reaction of dodecanoic acid and 2‐ethylhexanol.