One-Step/One-Pot Decoration of Oxide Microparticles with Silver Nanoparticles

MICAELA A. MACCHIONE ; OSCAR A. DOUGLAS-GALLARDO ; LUIS A. PÉREZ ; NICOLÁS PASSARELLI ; RAQUEL MOIRAGHI; ANA SPITALE ; DANIEL BAHENA ; FABIANA Y. OLIVA ; MARCELO M. MARISCAL ; MIGUEL JOSÉ YACAMÁN; EDUARDO A. CORONADO ; VICENTE A. MACAGNO ; MANUEL A. PÉREZ

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: San Diego; Año: 2014 vol. 428 p. 32 - 32

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 driven 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