一步/一锅法在氧化物微球表面修饰纳米银。

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

机构信息

INFIQC, CONICET and Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina.

INFIQC, CONICET and Departamento de Matemática y Física, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina.

出版信息

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

DOI:10.1016/j.jcis.2014.04.039

PMID:24910031

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.

摘要

假设

氧化银（Ag2O）异质成核到氧化物微粒（OMPs）上，然后自发进行热分解，产生由 OMPs 修饰的纳米银颗粒（OMP|AgNPs）的纳米结构。

实验

通过进行 Ag2O 的沉淀/热分解，胶体化学方法已被用于在 OMPs 上修饰纳米银颗粒（AgNPs）。该过程在富含水的丙酮介质中进行，其中含有 NaOH、NH3、AgNO3 和作为基底的 SiO2MPs。通过使用 STEM、EDS、HRTEM 和拉曼光谱对 OMP|AgNPs 的光学和形态特性进行了表征。