Hollow Polymer Microspheres Containing Gold-nanocolloid Core Adsorbed on the Inner-surface as A Catalytic Microreactor
writer：Xiaoxu Wang, Hongfen Ji, Xu Zhang, Han Zhang, and Xinlin Yang*
keywords：Gold metallic nanocolloids, Inner functional microsphere
source：期刊
specific source：J. Mater. Sci., 45 (15), 3981-3989 (2010). DOI: 10.1007/s10853-010-4470-z
Issue time：2010年
Hollow polymer microspheres with different polarity and functional group for the shell layer containing gold nanocolloid cores adsorbed on the inner surface were
prepared by selective removal of sandwiched silica layer from the corresponding gold/silica/polydivinylbenzene (Au/SiO2/PDVB), Au/SiO2/poly(ethyleneglycol dimethacrylate) (Au/SiO2/PEGDMA), and Au/SiO2/poly(ethyleneglycol
dimethacrylate-co-methacrylic acid) (Au/SiO2/P(EGDMA-co-MAA) tri-layer microspheres, respectively. The tri-layer microspheres were synthesized by distillation precipitation
polymerizations of divinylbenzene (DVB), ethyleneglycol dimethacrylate (EGDMA), EGDMA together with methacrylic acid (MAA) in presence of 3-(methacryloxy)propyltrimethoxysilane (MPS)-modified gold/silica (Au/SiO2) core–shell particles as seeds, which were prepared by coating of a layer of silica onto the surface of Au nanocolloids
with the aid of polyvinylpyrrolidone (PVP) via a modified Sto¨ber method. The catalytic property and stability as a microreactor of the hollow polymer microspheres with Au nanocolloid cores adsorbed on the inner surface were studied by the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AnP) with sodium borohydride (NaBH4) as reductant. Transmission electron microscopy (TEM) and Fourier transform infrared spectra (FT-IR) were used for characterizing the morphology and structure of the resultant microspheres.