Preparation of Polymer Microspheres with Reactive Epoxy Group and Amino Groups as Stabilizers for Gold Nanocolloids with Recoverable Catalysis
writer：Tao Song, Meijun Zhou, Wei Liu, *, Guomin Bian, Yonglin Qi, Feng Bai,* and Xinlin Yang*
keywords：P(DVB-co-GMA) microsphere; Epoxy group; Amino group; Distillation precipitation polymerization; Gold nanocolloids
source：期刊
specific source：Colloid Polymer Science 293 (1), 187-197 (2015). DOI: 10.1007/s00396-014-3408-4)
Issue time：2015年
Narrow disperse poly(divinylbenzene-co-glycidyl
methacrylate) (P(DVB-co-GMA))
microspheres with reactive epoxy group were prepared by distillation
precipitation copolymerization of divinylbenzene (DVB) and glycidyl
methacrylate (GMA) with benzoyl peroxide (BPO) as initiator in neat
acetonitrile. The epoxy group was modified with ethylenediaminie (EDA) for
transferring to amino group, which was used as stabilizer for the gold metallic
nanocolloids during the in-situ reduction of gold chloride trihydrate (HAuCl4) with sodium
borohydride (NaBH4) as a reductant. The catalytic properties of the
microsphere-stabilized gold nanocolloids (P(DVB-co-GMA)-NH2@Au)) were investigated by the reduction of
aqueous 4-nitrophenol (4-NP) to 4-aminophenol (4-AnP) with NaBH4 as
reductant. The resultant microspheres were characterized by scanning electron
microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform
infrared spectra (FT-IR), elemental analysis (EA), Zeta-potential, X-ray
photoelectron spectroscopy (XPS), inductive coupled plasma (ICP) mission
spectrum and UV-vis spectroscopy.