Ag Nanoparticle/Polydopamine-Coated Inverse Opals as Highly Efficient Catalytic Membranes

ACS Applied Materials & Interfaces
Gwan H ChoiPil J Yoo

Abstract

Polymeric three-dimensional inverse-opal (IO) structures provide unique structural properties useful for various applications ranging from optics to separation technologies. Despite vast needs for IO functionalization to impart additional chemical properties, this task has been seriously challenged by the intrinsic limitation of polymeric porous materials that do not allow for the easy penetration of waterborne moieties or precursors. To overcome this restriction, we present a robust and straightforward method of employing a dipping-based surface modification with polydopamine (PDA) inside the IO structures, and demonstrate their application to catalytic membranes via synthetic incorporation of Ag nanoparticles. The PDA coating offers simultaneous advantages of achieving the improved hydrophilicity required for the facilitated infiltration of aqueous precursors and successful creation of nucleation sites for a reduction of growth of the Ag nanoparticles. The resulting Ag nanoparticle-incorporated IO structures are utilized as catalytic membranes for the reduction of 4-nitrophenol to its amino derivatives in the presence of NaBH4. Synergistically combined characteristics of high reactivity of Ag nanoparticles along with a greatl...Continue Reading

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Citations

Mar 18, 2016·Nano Letters·Michael Thomas BarakoKenneth E Goodson
Sep 14, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Yi XieChangsheng Zhao
Dec 21, 2017·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Changcheng GaoBin Li

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