Synthesis of Silver-Strontium Titanate Hybrid Nanoparticles by Sol-Gel-Hydrothermal Method

Silver (Ag) nanoparticle-loaded strontium titanate (SrTiO₃) nanoparticles were attempted to be synthesized by a sol-gel-hydrothermal method. We prepared the titanium oxide precursor gels incorporated with Ag⁺ and Sr ions with various molar ratios, and they were successfully converted into the Ag-SrT...

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Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2015-03, Vol.5 (2), p.386-397
Main Authors: Ueno, Shintaro, Nakashima, Kouichi, Sakamoto, Yasunao, Wada, Satoshi
Format: Article
Language:English
Subjects:
Agglomeration
Aqueous solutions
Diffusion rate
Electron microscopes
Gels
hybrid particles
Ions
Morphology
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Precursors
Ratios
Silver
silver nanoparticles
Sol-gel processes
sol-gel-hydrothermal method
Strontium
strontium titanate
Strontium titanates
Titanium
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creator Ueno, Shintaro
Nakashima, Kouichi
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description Silver (Ag) nanoparticle-loaded strontium titanate (SrTiO₃) nanoparticles were attempted to be synthesized by a sol-gel-hydrothermal method. We prepared the titanium oxide precursor gels incorporated with Ag⁺ and Sr ions with various molar ratios, and they were successfully converted into the Ag-SrTiO₃ hybrid nanoparticles by the hydrothermal treatment at 230 °C in strontium hydroxide aqueous solutions. The morphology of the SrTiO₃ nanoparticles is dendritic in the presence and absence of Ag⁺ ions. The precursor gels, which act as the high reactive precursor, give rise to high nucleation and growth rates under the hydrothermal conditions, and the resultant diffusion-limited aggregation phenomena facilitate the dendritic growth of SrTiO₃. From the field-emission transmission electron microscope observation of these Ag-SrTiO₃ hybrid nanoparticles, the Ag nanoparticles with a size of a few tens of nanometers are distributed without severe agglomeration, owing to the competitive formation reactions of Ag and SrTiO₃.
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subjects Agglomeration
Aqueous solutions
Diffusion rate
Electron microscopes
Gels
hybrid particles
Ions
Morphology
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Precursors
Ratios
Silver
silver nanoparticles
Sol-gel processes
sol-gel-hydrothermal method
Strontium
strontium titanate
Strontium titanates
Titanium
title Synthesis of Silver-Strontium Titanate Hybrid Nanoparticles by Sol-Gel-Hydrothermal Method
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