Fox, Catherine M. and Yu, Tian and Breslin, Carmel B. (2020) Electrochemical formation of silver nanoparticles and their catalytic activity immobilised in a hydrogel matrix. Colloid and Polymer Science, 298 (6). pp. 549-558. ISSN 0303-402X

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Abstract

Silver nanoparticles were formed electrochemically in the presence of poly(N-vinylpyrrolidone) (PVP) to generate highly stable nanoparticles with a mean diameter of 12 nm. The optimised conditions involved formation at − 6.0 V vs Ag|Ag+ with a PVP:Ag+ ratio of 75:1. Particle agglomeration was observed when the PVP:Ag+ ratio was reduced to 25:1 and when extended polarisation periods were employed. Using the optimised conditions, the silver nanoparticles remained stable for periods in excess of 2 months. The nanoparticles were immobilised inside a polyacrylamide hydrogel and used for the reduction of 4-nitrophenol. The rate constant obtained for the reduction of 4-nitrophenol was calculated as 7.1 × 10−4 to 1.6 × 10−3 s−1 depending on the amount of silver. The hydrogel–Ag composite was stable and could be stored for several months, while there was little change in the rate constant when it was repeatedly used.

Item Type:	Article
Keywords:	Silver nanoparticles; Hydrogel; Electrochemical; Catalysis;
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	16203
Identification Number:	https://doi.org/10.1007/s00396-020-04624-5
Depositing User:	Dr. Carmel Breslin
Date Deposited:	29 Jun 2022 08:46
Journal or Publication Title:	Colloid and Polymer Science
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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