Multi-layer Magnetic Composite Particles with Functional Polymer Brushes as Stabilizer for Gold Nanocolloids and Their Recyclable Catalysis
writer：Bin Liu, Dongwei Zhang, Jianchao Wang, Cheng Chen, Xinlin Yang*
keywords：Polymer brush; Surface grafting polymerization; Supported metallic nanocolloids
source：期刊
specific source：J. Phys. Chem. C, 117 (12), 6363-6372 (2013). DOI: 10.1021/jp311467b
Issue time：2013年
Multifunctional
Fe3O4@SiO2@PHEMA-g-PDMAEMA microspheres with magnetic core and polymer brushes were prepared via a successive process, which combined the solvothermal
method and sol?gel technique for the synthesis of inorganic core with DPP and ATRP for the preparation of the outer polymer shell. The gold nanoparticles were facilely loaded onto
the multifunctional microspheres by the in situ reduction of HAuCl4 with NaBH4 as reductant via the efficient stabilization of the PDMAEMA brush to the gold metallic nanocolloids. The
Fe3O4@SiO2@PHEMA-g-PDMAEMA/Au had a stable catalytic activity due to the efficient stabilization of the grafted PDMAEMA brush to the gold metallic nanocolloids during their recycling with a facile recovery (at least six times). The combined inorganic?organic process may be used for the synthesis of other functional materials with unique structures and novel properties.