Gold nanoparticles stabilized by amphoteric cryogel-perspective flow-through catalytic reactor for oxidation and reduction processes

Alexey N. Klivenko, A. Yergaziyeva, Sarkyt E. Kudaibergenov

2016

Closed access Metadata (CSL-JSON)
DOI 10.1109/nap.2016.7757304
Data confidence 70 medium
How this score is calculated

It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.

Abstract

New type of catalytic system based on macroporous amphoteric cryogel was synthesized by free radical polymerization of methacrylic acid (MAA) and (N'N'-dimethylaminoethylmethacrylate (DMAEM) in cryoconditions. The amphoteric cryogel was modified by gold nanoparticles (AuNPs) heating of cryogel in aqueous solution of tetrachloroauric acid, as a result the initial white cryogel was discolored in red. Morphology of DMAEM-co-MAA/AuNPs was evaluated by scanning electron microscopy (SEM). The MAA-co-DMAEM/AuNPs-was used as a flow-through catalytic reactor in re-duction of 4-nitrophenol (4-NP) by sodium boronhydride and in oxidation of dithiotreitol (DTT) by hydrogen peroxide. The catalytic activity of MAA-co-DMAEM/AuNPs was stable and preserved no less than 10 catalytic cycles. The rate constants, activation energies, and thermodynamic parameters of oxidation and reduction reactions were calculated.