Preparation
of a Sulfur-Functionalized Microporous Polymer Sponge and In Situ
Growth of Silver Nanoparticles: A Compressible Monolithic Catalyst
Jong Gil Kim
Min Chul Cha
Jeongmin Lee
Taejin Choi
Ji Young Chang
10.1021/acsami.7b14807.s001
https://acs.figshare.com/articles/journal_contribution/Preparation_of_a_Sulfur-Functionalized_Microporous_Polymer_Sponge_and_In_Situ_Growth_of_Silver_Nanoparticles_A_Compressible_Monolithic_Catalyst/5505844
We report a compressible
monolithic catalyst based on a microporous organic polymer (MOP) sponge.
The monolithic MOP sponge was synthesized via Sonogashira-Hagihara
coupling reaction between 1,4-diiodotetrafluorobenzene and 1,3,5-triethynylbenzene
in a cosolvent of toluene and TEA (2:1, v/v) without stirring. The
MOP sponge had an intriguing microstructure, where tubular polymer
fibers having a diameter of hundreds of nanometers were entangled.
It showed hierarchical porosity with a Brunauer–Emmett–Teller
(BET) surface area of 512 m<sup>2</sup> g<sup>–1</sup>. The
MOP sponge was functionalized with sulfur groups by the thiol–yne
reaction. The functionalized MOP sponge exhibited a higher BET surface
area than the MOP sponge by 13% due to the increase in the total pore
and micropore volumes. A MOP sponge-Ag heterogeneous catalyst (S-MOPS-Ag)
was prepared by in situ growth of silver nanoparticles inside the
sulfur-functionalized MOP sponge by the reduction of Ag<sup>+</sup> ions. The catalytic activity of S-MOPS-Ag was investigated for the
reduction reaction of 4-nitrophenol in an aqueous condition. When
S-MOPS-Ag was compressed and released during the reaction, the rate
of the reaction was considerably increased. S-MOPS-Ag was easily removed
from the reaction mixture owing to its monolithic character and was
reused after washing and drying.
2017-10-10 00:00:00
functionalized MOP sponge
BET surface area
MOP sponge
Compressible Monolithic Catalyst
sulfur-functionalized MOP sponge
Sulfur-Functionalized Microporous Polymer Sponge
S-MOPS-Ag