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Solid‐State Synthesis of Silver Nanoparticles and Their Catalytic Application in Methylene Blue Reduction
Author(s) -
Veljović Djordje N.,
Gurešić Dejan M.,
Jokić Anja B.,
Vasić Vesna M.,
Laban Bojana B.
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001829
Subject(s) - sodium borohydride , catalysis , methylene blue , dynamic light scattering , scanning electron microscope , zeta potential , nanoparticle , silver nanoparticle , silver nitrate , reaction rate constant , chemistry , materials science , sodium citrate , reducing agent , inorganic chemistry , particle size , chemical engineering , nuclear chemistry , nanotechnology , kinetics , photocatalysis , organic chemistry , medicine , physics , pathology , quantum mechanics , engineering , composite material
The silver nanoparticles (Ag NPs) were successfully synthesized by a facile solid‐state chemical method. Ag NPs were obtained by a mechanochemical reaction between silver nitrate and sodium citrate, with the constant stirring and heating of reactants. The size and morphology characterization of NPs powder was performed by scanning electron microscopy. The obtained NPs were spherical with a 36 nm average particle size diameter. UV‐Vis spectroscopy, dynamic light scattering, and zeta potential measurements were used in order to characterize the surface plasmon band position in colloid dispersion and the NPs charges. Obtained NPs were utilized as a catalyst in the process of methylene blue (MB) reduction in the presence of sodium‐borohydride. Kinetic measurements of uncatalyzed and catalyzed reduction were carried out using the stopped‐flow technique, keeping the concentration of reactant constant. Mechanism of MB reduction in the presence of catalyst Ag NPs is elucidated as a consecutive two first‐order reactions. The results of these studies support the hypothesis that NPs participated in electron transfer.