Nanostructures constituted by unusually small silica nanoparticles modified with metal oxides as support for ultra-small gold nanoparticles

Oxana Anatolievna Martynyuk, Yulia Kotolevich, Alexey Pestryakov, Josue D. Mota-Morales, Nina Bogdanchikova

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Mesoporous silica composed by small nanoparticles has been synthesized by a modified neutral S0I0 templating route method (S0, neutral primary amine surfactant; I0, neutral inorganic precursor). Decreasing the polarity of the medium and tuning the composition of the S0I0 pair allow the formation of silica nanoparticles that are agglomerated into silica fractal or sponge-like structures. Those nanoparticles conform the building blocks of the neutral S0I0 method. In this work for the first time they are observed isolated by HRTEM. On the other hand, the addition of metal oxides triggers the formation of aggregates containing unusually small silica nanoparticles, i.e. smaller building blocks that in bare silica, in the range of 2-4nm. Further, through the impregnation of a gold precursor post-synthesis, ultra small gold nanoparticles (1nm) were embedded in the final silica nanostructures upon calcination of the organic precursors. FTIR and UV-vis spectroscopies, TEM and SEM, XRD and N2 absorption were used to characterize the resultant materials.

Original languageEnglish
Pages (from-to)9-16
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume487
DOIs
Publication statusPublished - 20 Dec 2015

Fingerprint

Silicon Dioxide
Gold
Oxides
metal oxides
Nanostructures
Metals
Silica
gold
Nanoparticles
silicon dioxide
nanoparticles
Ultraviolet spectroscopy
Surface-Active Agents
Impregnation
Fractals
Calcination
roasting
Amines
fractals
polarity

Keywords

  • Catalysis
  • Gold nanoparticle
  • Mesoporous silica
  • Metal oxide
  • Silica nanoparticle

ASJC Scopus subject areas

  • Colloid and Surface Chemistry

Cite this

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title = "Nanostructures constituted by unusually small silica nanoparticles modified with metal oxides as support for ultra-small gold nanoparticles",
abstract = "Mesoporous silica composed by small nanoparticles has been synthesized by a modified neutral S0I0 templating route method (S0, neutral primary amine surfactant; I0, neutral inorganic precursor). Decreasing the polarity of the medium and tuning the composition of the S0I0 pair allow the formation of silica nanoparticles that are agglomerated into silica fractal or sponge-like structures. Those nanoparticles conform the building blocks of the neutral S0I0 method. In this work for the first time they are observed isolated by HRTEM. On the other hand, the addition of metal oxides triggers the formation of aggregates containing unusually small silica nanoparticles, i.e. smaller building blocks that in bare silica, in the range of 2-4nm. Further, through the impregnation of a gold precursor post-synthesis, ultra small gold nanoparticles (1nm) were embedded in the final silica nanostructures upon calcination of the organic precursors. FTIR and UV-vis spectroscopies, TEM and SEM, XRD and N2 absorption were used to characterize the resultant materials.",
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author = "Martynyuk, {Oxana Anatolievna} and Yulia Kotolevich and Alexey Pestryakov and Mota-Morales, {Josue D.} and Nina Bogdanchikova",
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T1 - Nanostructures constituted by unusually small silica nanoparticles modified with metal oxides as support for ultra-small gold nanoparticles

AU - Martynyuk, Oxana Anatolievna

AU - Kotolevich, Yulia

AU - Pestryakov, Alexey

AU - Mota-Morales, Josue D.

AU - Bogdanchikova, Nina

PY - 2015/12/20

Y1 - 2015/12/20

N2 - Mesoporous silica composed by small nanoparticles has been synthesized by a modified neutral S0I0 templating route method (S0, neutral primary amine surfactant; I0, neutral inorganic precursor). Decreasing the polarity of the medium and tuning the composition of the S0I0 pair allow the formation of silica nanoparticles that are agglomerated into silica fractal or sponge-like structures. Those nanoparticles conform the building blocks of the neutral S0I0 method. In this work for the first time they are observed isolated by HRTEM. On the other hand, the addition of metal oxides triggers the formation of aggregates containing unusually small silica nanoparticles, i.e. smaller building blocks that in bare silica, in the range of 2-4nm. Further, through the impregnation of a gold precursor post-synthesis, ultra small gold nanoparticles (1nm) were embedded in the final silica nanostructures upon calcination of the organic precursors. FTIR and UV-vis spectroscopies, TEM and SEM, XRD and N2 absorption were used to characterize the resultant materials.

AB - Mesoporous silica composed by small nanoparticles has been synthesized by a modified neutral S0I0 templating route method (S0, neutral primary amine surfactant; I0, neutral inorganic precursor). Decreasing the polarity of the medium and tuning the composition of the S0I0 pair allow the formation of silica nanoparticles that are agglomerated into silica fractal or sponge-like structures. Those nanoparticles conform the building blocks of the neutral S0I0 method. In this work for the first time they are observed isolated by HRTEM. On the other hand, the addition of metal oxides triggers the formation of aggregates containing unusually small silica nanoparticles, i.e. smaller building blocks that in bare silica, in the range of 2-4nm. Further, through the impregnation of a gold precursor post-synthesis, ultra small gold nanoparticles (1nm) were embedded in the final silica nanostructures upon calcination of the organic precursors. FTIR and UV-vis spectroscopies, TEM and SEM, XRD and N2 absorption were used to characterize the resultant materials.

KW - Catalysis

KW - Gold nanoparticle

KW - Mesoporous silica

KW - Metal oxide

KW - Silica nanoparticle

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