One-step/one-pot decoration of oxide microparticles with silver nanoparticles

M. A. MACCIONE; O. A. DOUGLAS GALLARDO; L. A. PÉREZ; N. PASSARELLI; R. MOIRAGHI; A. SPITALE; D. BAHENA; F. Y. OLIVA; M. M. MARISCAL; M. JOSÉ YACAMÁN; E. A. CORONADO; V. A. MACAGNO; M. A. PÉREZ

JOURNAL OF COLLOID AND INTERFACE SCIENCE

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 2014 vol. 428 p. 32 - 32

0021-9797

ypothesis: Heterogeneous nucleation of silver oxide (Ag2O) onto oxide microparticles (OMPs) followed by spontaneous thermal decomposition produce nanostructures made of OMPs decorated with silver nanoparticles (OMP|AgNPs).Experiments: Colloidal chemistry methods have been used to produce the decoration of OMPs with silver nanoparticles (AgNPs), by carrying out the Ag2O precipitation/thermal decomposition. The process is dri-ven in water enriched acetone medium containing NaOH, NH3, AgNO3 and SiO2MPs as substrate. Optical and morphological properties of OMP|AgNPs were characterized by using STEM, EDS, HRTEM and Raman spectroscopy.Findings: A new synthetic method to decorate OMPs (TiO2, SiO2) with metallic AgNPs in a single step/single pot reaction is proven effective to produce OMP|AgNPs either in aqueous or water enriched media.