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Type: Journal article
Title: The formation and catalytic activity of silver nanoparticles in aqueous polyacrylate solutions
Author: Wang, J.
Liu, J.
Guo, X.
Yan, L.
Lincoln, S.
Citation: Frontiers of Chemical Science and Engineering, 2016; 10(3):432-439
Publisher: Springer-Verlag
Issue Date: 2016
ISSN: 2095-0179
Statement of
Jie Wang, Jianjia Liu, Xuhong Guo, Liang Yan, Stephen F. Lincoln
Abstract: Silver nanoparticles (AgNPs) have been synthesized in the presence of polyacrylate through the reduction of silver nitrate by sodium borohydride in aqueous solution. The AgNO3 and polyacrylate carboxylate group concentrations were kept constant at 2.0 × 10–4 and 1.0 × 10–2 mol·L–1, respectively, while the ratio of [NaBH4]/[AgNO3] was varied from 1 to 100. The ultraviolet-visible plasmon resonance spectra of these solutions were found to vary with time prior to stabilizing after 27 d, consistent with changes of AgNP size and distribution within the polyacrylate ensemble occurring. These observations, together with transmission electron microscopic results, show this rearrangement to be greatest among the samples at the lower ratios of [NaBH4]/[AgNO3] used in the preparation, whereas those at the higher ratios showed a more even distribution of smaller AgNP. All ten of the AgNP samples, upon a one thousand-fold dilution, catalyze the reduction of 4-nitrophenol to 4-aminophenol in the temperature range 283.2–303.2 K with a substantial induction time being observed at the lower temperatures.
Keywords: silver nanoparticles polyacrylates; catalysis; mechanism; sodium borohydride
Description: First Online: 21 August 2016
Rights: © Higher Education Press and Springer-Verlag Berlin Heidelberg 2016
DOI: 10.1007/s11705-016-1584-0
Grant ID: ARC
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Chemistry publications

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