Abstract
Formation of silver nanoparticles in the presence of various aminipolycarboxylic acids (APCAs) such as iminodiacetic acid (IDA), nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA), N-(2-hydroxyethyl) ethylenediaminetriacetic acid (HEDTA), diethylenetriaminepentaacetic acid (DTPA), and N,N,N′,N″,N‴,N‴-triethylenetetraminehexaacetic acid (TTHA) was studied. Monodispersed silver nanoparticles capped by carboxylate groups of APCAs were prepared by the reduction of Ag+ ions induced by either γ-radiolytic or H2 reduction at room temperature. APCAs act as stabilizer to avoid the aggregation of silver nanoparticles. It has been shown that H2-induced reduction of Ag+ is possible at room temperature in the presence of APCAs. TTHA stabilized γ-reduced particles showed reactivity towards oxygen. The formed particles were characterized by UV–vis absorption, X-ray diffraction, zetasizer and transmission electron microscopy.
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