Mesoporous SnO2-SiO2 and Sn-silica-carbon nanocomposites by novel non-hydrolytic templated sol-gel synthesis
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00462668" target="_blank" >RIV/68081723:_____/16:00462668 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/61388980:_____/16:00462668 RIV/00216224:14740/16:00090873
Výsledek na webu
<a href="http://dx.doi.org/10.1039/c6ra16556g" target="_blank" >http://dx.doi.org/10.1039/c6ra16556g</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c6ra16556g" target="_blank" >10.1039/c6ra16556g</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Mesoporous SnO2-SiO2 and Sn-silica-carbon nanocomposites by novel non-hydrolytic templated sol-gel synthesis
Popis výsledku v původním jazyce
A novel non-hydrolytic sol-gel (NHSG) synthesis of mesoporous tin silicate xerogels is presented. The polycondensation between silicon tetraacetate, Si(OAc)(4), and tetrakis(diethylamido)tin, Sn(NEt2)(4), resulting in acetamide elimination leads to tin silicate xerogels containing Si-O-Sn linkages. The addition of Pluronic P123 or F127 templates provides homogeneous stiff gels that are, after template removal by calcination at 500 degrees C in air, converted to stable mesoporous silica xerogels with large surface areas (476 m(2) g(-1)) and dispersed SnO2 nanoparticles (6-7 nm). Heat treatment of the as-prepared tin silicate gels in an inert N-2 atmosphere leads to reduction and transformation to Sn nanoparticles (70-150 nm) embedded in a silica-carbon matrix. The composition and morphology of the xerogels, volatile reaction byproducts, and thermal transformations were followed by elemental analyses, IR spectroscopy, thermal analysis TG-DSC, nitrogen adsorption measurements, solid-state NMR spectroscopy, DRUV-vis spectroscopy, electron microscopy, and HT powder XRD. The SnO2-SiO2 xerogels were tested as potential catalysts for aminolysis of styrene oxide with aniline and for the Meerwein-Ponndorf-Verley reduction of 4-tert-butylcyclohexanone. The resulting reaction systems displayed good activity and selectivity.
Název v anglickém jazyce
Mesoporous SnO2-SiO2 and Sn-silica-carbon nanocomposites by novel non-hydrolytic templated sol-gel synthesis
Popis výsledku anglicky
A novel non-hydrolytic sol-gel (NHSG) synthesis of mesoporous tin silicate xerogels is presented. The polycondensation between silicon tetraacetate, Si(OAc)(4), and tetrakis(diethylamido)tin, Sn(NEt2)(4), resulting in acetamide elimination leads to tin silicate xerogels containing Si-O-Sn linkages. The addition of Pluronic P123 or F127 templates provides homogeneous stiff gels that are, after template removal by calcination at 500 degrees C in air, converted to stable mesoporous silica xerogels with large surface areas (476 m(2) g(-1)) and dispersed SnO2 nanoparticles (6-7 nm). Heat treatment of the as-prepared tin silicate gels in an inert N-2 atmosphere leads to reduction and transformation to Sn nanoparticles (70-150 nm) embedded in a silica-carbon matrix. The composition and morphology of the xerogels, volatile reaction byproducts, and thermal transformations were followed by elemental analyses, IR spectroscopy, thermal analysis TG-DSC, nitrogen adsorption measurements, solid-state NMR spectroscopy, DRUV-vis spectroscopy, electron microscopy, and HT powder XRD. The SnO2-SiO2 xerogels were tested as potential catalysts for aminolysis of styrene oxide with aniline and for the Meerwein-Ponndorf-Verley reduction of 4-tert-butylcyclohexanone. The resulting reaction systems displayed good activity and selectivity.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CF - Fyzikální chemie a teoretická chemie
OECD FORD obor
—
Návaznosti výsledku
Projekt
<a href="/cs/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
RSC Advances
ISSN
2046-2069
e-ISSN
—
Svazek periodika
6
Číslo periodika v rámci svazku
73
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
9
Strana od-do
68739-68747
Kód UT WoS článku
000381512600023
EID výsledku v databázi Scopus
2-s2.0-84979901995