Role of base in the formation of silver nanoparticles synthesized using sodium acrylate as a dual reducing and encapsulating agent

Shun Nishimura, Derrick Mott, Atsushi Takagaki, Shinya Maenosono, Kohki Ebitani

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The formation mechanism of Ag nanoparticles (NPs) synthesized with a wet-chemical reduction method using sodium acrylate as a dual reducing and capping agent was investigated with various analytical techniques. The time course of the state of the reaction solution was investigated using UV-vis and XAFS spectroscopies which showed that the NP formation rate increased with increasing concentration of sodium hydroxide (NaOH). The detailed kinetic analyses reveal that both the reduction rate of Ag ions and the nucleation rate of Ag NPs are dramatically increased with increasing NaOH concentration. XANES analyses imply that another reaction pathway via alternative Ag+ species, such as Ag(OH)x, was developed in the presence of NaOH. Consequently, NaOH is found to play an important role not only in creating specific intermediates in the reduction of Ag+ to Ag0, but also in accelerating the reduction and nucleation rates by enhancing the oxidation of sodium acrylate, thereby increasing the rate of formation of the Ag NPs.

Original languageEnglish
Pages (from-to)9335-9343
Number of pages9
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number20
DOIs
Publication statusPublished - May 28 2011

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encapsulating
acrylates
Silver
Sodium
silver
sodium
Nanoparticles
nanoparticles
Nucleation
X ray absorption fine structure spectroscopy
Sodium Hydroxide
nucleation
Ultraviolet spectroscopy
sodium hydroxides
Ions
Oxidation
Kinetics
acrylic acid
oxidation
kinetics

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Role of base in the formation of silver nanoparticles synthesized using sodium acrylate as a dual reducing and encapsulating agent. / Nishimura, Shun; Mott, Derrick; Takagaki, Atsushi; Maenosono, Shinya; Ebitani, Kohki.

In: Physical Chemistry Chemical Physics, Vol. 13, No. 20, 28.05.2011, p. 9335-9343.

Research output: Contribution to journalArticle

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