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Title: Catecholamine-induced electroless metallization of silver on silica@polymer hybrid nanospheres and their catalytic applications
Authors: Xu, L.Q.
Yap, B.S.M.
Wang, R.
Neoh, K.-G. 
Kang, E.-T. 
Fu, G.D.
Issue Date: 26-Feb-2014
Source: Xu, L.Q., Yap, B.S.M., Wang, R., Neoh, K.-G., Kang, E.-T., Fu, G.D. (2014-02-26). Catecholamine-induced electroless metallization of silver on silica@polymer hybrid nanospheres and their catalytic applications. Industrial and Engineering Chemistry Research 53 (8) : 3116-3124. ScholarBank@NUS Repository.
Abstract: Narrowly dispersed raspberry-like SiO2@poly(dopamine acrylamide-co-methacrylic acid-co-ethylene glycol dimethacrylate)/Ag (or SiO2@PDA/Ag) composite nanospheres were synthesized via a combination of sol-gel reaction, distillation-precipitation polymerization, reactive ester-amine reaction, and electroless metallization. In this approach, SiO 2@poly(pentafluorophenyl acrylate-co-methacrylic acid-co-ethylene glycol dimethacrylate) (or SiO2@PPFA) core-shell nanospheres were first prepared by distillation-precipitation polymerization, using the SiO 2-3-(trimethoxysilyl)propyl methacrylate (SiO2-MPS) nanospheres from sol-gel reaction as seeds. The reactive pentafluorophenyl (PFP) ester moieties on SiO2@PPFA nanospheres can readily react with dopamine hydrochloride to form amide linkages with no side reaction under a mild condition. The catecholamine moieties in the resulting SiO2@PDA nanospheres were utilized for simultaneous reduction of Ag+ ions and coordinative binding of the metal nanoparticles. The SiO2-MPS, SiO2@PPFA, and SiO2@PDA nanospheres as well as the raspberry-like SiO2@PDA/Ag composite nanospheres were characterized by field-emission transmission electron microscopy (FETEM), thermogravimetric analysis (TGA), dynamic light scattering (DLS), X-ray photoelectron spectroscopy (XPS), and FT-IR spectroscopy. Furthermore, the as-synthesized SiO 2@PDA/Ag composite nanospheres were explored for the catalytic reduction of p-nitrophenol and degradation of rhodamine 6G (R6G) dye. © 2014 American Chemical Society.
Source Title: Industrial and Engineering Chemistry Research
ISSN: 08885885
DOI: 10.1021/ie403840p
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