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J Colloid Interface Sci. 2014 Aug 15;428:32-5. doi: 10.1016/j.jcis.2014.04.039. Epub 2014 Apr 28.

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

Author information

1
INFIQC, CONICET and Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina.
2
INFIQC, CONICET and Departamento de Matemática y Física, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina.
3
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, United States.
4
INFIQC, CONICET and Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina. Electronic address: mperez@fcq.unc.edu.ar.

Abstract

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.

KEYWORDS:

Metal–oxide adhesion; Nanostructures; Silver oxide; Synthesis; Thermal decomposition

PMID:
24910031
DOI:
10.1016/j.jcis.2014.04.039
[Indexed for MEDLINE]

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