A silica-silver nanocomposite obtained by sol-gel method in the presence of silver nanoparticles

• Authors: Carmen Racles , Alexandra Nistor , Maria Cazacu
• Languages of publication: EN

Abstracts

EN

Silver nanoparticles (AgNPs) were obtained by a redox reaction, using a glucose-containing cyclosiloxane as a reduction agent and stabilizer. Then the AgNPs aqueous solution was used as the reaction medium for the sol-gel process, starting from tetraethylorthosilicate (TEOS) as silica precursor. The nanocomposite material resulted (SilAg) after solvent removal, aging and calcination and was investigated by infrared spectroscopy (FT-IR), atomic force microscopy (AFM), scanning electron microscopy coupled with energy dispersive X-ray system (SEM/EDX), transmission electron microscopy (TEM), energy-dispersive X-ray fluorescence spectroscopy (EDXRF), X-ray diffraction (XRD) and dynamic vapor sorption (DVS). The results were compared to model silicas obtained without silver. A higher condensation degree in SilAg was obtained due to the basic medium used in the first step and was confirmed by a sorption capacity lower than for the model silicas. The solid surface area calculated with GAB analysis using DVS data for the water vapors is 210 m2 g−1. The nanocomposite showed good catalytic activity for hydrogen peroxide decomposition. [...]

Keywords

EN

Silver nanoparticles; Siloxane surfactant; Sol-gel; Silica

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2013
• Volume: 11
• Issue: 10
• Pages: 1689-1698

Dates

published

1 - 10 - 2013

online

19 - 7 - 2013

Contributors

author

Carmen Racles

• “Petru Poni” Institute of Macromolecular Chemistry, RO700487, Iasi, Romania

author

Alexandra Nistor

• “Petru Poni” Institute of Macromolecular Chemistry, RO700487, Iasi, Romania

author

Maria Cazacu

• “Petru Poni” Institute of Macromolecular Chemistry, RO700487, Iasi, Romania

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Identifiers

DOI

10.2478/s11532-013-0294-4