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

JOURNAL OF COLLOID AND INTERFACE SCIENCE

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 2014 vol. 428 p. 32 - 35

0021-9797

Hypothesis: 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.