Nanostructures constituted by unusually small silica nanoparticles modified with metal oxides as support for ultra-small gold nanoparticles
| Parent link: | Colloids and Surfaces A: Physicochemical and Engineering Aspects: Scientific Journal Vol. 487.— 2015.— [P. 9–16] |
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| निगमित लेखकों: | , |
| अन्य लेखक: | , , , , |
| सारांश: | Title screen 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 2–4 nm. Further, through the impregnation of a gold precursor post-synthesis, ultra small gold nanoparticles (1 nm) 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. Режим доступа: по договору с организацией-держателем ресурса |
| प्रकाशित: |
2015
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| विषय: | |
| ऑनलाइन पहुंच: | http://dx.doi.org/10.1016/j.colsurfa.2015.09.052 |
| स्वरूप: | इलेक्ट्रोनिक पुस्तक अध्याय |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=645157 |
| सारांश: | Title screen 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 2–4 nm. Further, through the impregnation of a gold precursor post-synthesis, ultra small gold nanoparticles (1 nm) 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. Режим доступа: по договору с организацией-держателем ресурса |
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| डिजिटल ऑब्जेक्ट पहचानकर्ता: | 10.1016/j.colsurfa.2015.09.052 |