Peer-Reviewed Journal Details
Mandatory Fields
Fox, CM;Yu, T;Breslin, CB
2020
March
Colloid and Polymer Science
Electrochemical formation of silver nanoparticles and their catalytic activity immobilised in a hydrogel matrix
Published
0 ()
Optional Fields
GOLD NANOPARTICLES REDUCTION ELECTRODE PERFORMANCE DISSOLUTION CITRATE
298
6
549
558
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 x 10(-4) to 1.6 x 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.
NEW YORK
0303-402X
10.1007/s00396-020-04624-5
Grant Details