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 language | English |
|---|---|
| Pages (from-to) | 9-16 |
| Number of pages | 8 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 487 |
| DOIs | |
| Publication status | Published - 20 Dec 2015 |
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Keywords
- Catalysis
- Gold nanoparticle
- Mesoporous silica
- Metal oxide
- Silica nanoparticle
ASJC Scopus subject areas
- Colloid and Surface Chemistry
Cite this
Nanostructures constituted by unusually small silica nanoparticles modified with metal oxides as support for ultra-small gold nanoparticles. / Martynyuk, Oxana Anatolievna; Kotolevich, Yulia; Pestryakov, Alexey; Mota-Morales, Josue D.; Bogdanchikova, Nina.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 487, 20.12.2015, p. 9-16.Research output: Contribution to journal › Article
}
TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=84942848044&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84942848044&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2015.09.052
DO - 10.1016/j.colsurfa.2015.09.052
M3 - Article
AN - SCOPUS:84942848044
VL - 487
SP - 9
EP - 16
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
ER -