Responsive Hybrid Polymeric/Metallic Nanoparticles for Catalytic Applications
-
Zhang, Jian-Tao; Wei, Gang; Keller, Thomas F.; Gallagher, Hilary; Stötzel, Christian; M\", Frank; uller, ; Gottschaldt, Michael; Schubert, Ulrich S.; Jandt, Klaus D.
- Abstract:
- The aims of the current study were to synthesize new responsive polymeric microgels with
embedded silver nanoparticles and then to employ these particles as catalyst for reduction
reactions. To these ends, stimuli-responsive microgels from PNIPAAm and the chitosan
derivative were firstly synthesized by free radical
precipitation polymerization. Then, silver nanoparticles
were synthesized inside these microgel networks
by in situ reduction of AgNO3. These microgels
were temperature/pH sensitive with a phase transition
temperature of 32–35 8C in water at pH¼3
and 8, respectively. The catalytic activity of the Ag
nanoparticles for the reduction of 4-nitrophenol can
be tuned through the swelling or collapse of the
responsive microgel network hosting the active
nanoparticles.
- Year:
- 2010
- Type of Publication:
- Article
- Journal:
- Macromolecular Materials and Engineering
- Volume:
- 295
- Pages:
- 1049 - 1057