posted on 2021-10-21, 18:16authored byMing-Bang Wu, Chao Zhang, Yi Xie, Sheng Huang, Chang Liu, Jian Wu, Zhi-Kang Xu
Elaborate
design of metal–organic frameworks (MOFs) composites
with enhanced properties is of fundamental interest and practical
importance in the fields of catalysis. Typical strategies are usually
focused on how to increase MOFs contents while lacking architecture
design for performance improvements. Herein, we first report MOFs
composites with Janus structures to boost catalytic performance by
Le Châtelier’s principle when using wood aerogel as
a versatile platform. Janus structures mean that one part of the composite
is still wood aerogel while the other part is decorated with MOFs.
The underoil hydrophilicity of the wood aerogels endows the Janus
composites with dehydration capacity for promoting the equilibrium
movement so as to boost the catalytic performance. The catalytic performance
of Janus composites for the Knoevenagel reaction increases more than
40% compared with those symmetric composites. Moreover, both the final
conversion and the reaction rate are much better for the Janus composites
than other state-of-the-art heterogeneous ZIF-8-based catalysts. Our
design is general and paves the way to exploit composites with special
architecture.