Metallic Calcium as a Precursor for Sol-Gel Synthesis of CaCO<sub>3</sub>-SiO<sub>2</sub> and CaO-SiO<sub>2</sub> Systems
A series of binary oxide systems with Ca/Si molar ratios of 0.05, 0.1, 0.25, 0.5 and 1.0 have been synthesized by the sol-gel technique from tetraethyl orthosilicate (TEOS) and metallic calcium powder. Upon calcination, a side effect of wollastonite formation as a result of the reaction between the...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2021-06-01
|
Series: | Ceramics |
Subjects: | |
Online Access: | https://www.mdpi.com/2571-6131/4/2/22 |
id |
doaj-a037ee8ccf764e128a53a061c487de8b |
---|---|
record_format |
Article |
spelling |
doaj-a037ee8ccf764e128a53a061c487de8b2021-06-30T23:15:52ZengMDPI AGCeramics2571-61312021-06-0142227829010.3390/ceramics4020022Metallic Calcium as a Precursor for Sol-Gel Synthesis of CaCO<sub>3</sub>-SiO<sub>2</sub> and CaO-SiO<sub>2</sub> SystemsPiotr Marciniak0Bogna Sztorch1Agnieszka Martyła2Agnieszka Czapik3Mikołaj Stodolny4Robert E. Przekop5Centre for Advanced Technologies, Adam Mickiewicz University in Poznan, ul. Uniwersytetu Poznanskiego 10, 61-614 Poznan, PolandCentre for Advanced Technologies, Adam Mickiewicz University in Poznan, ul. Uniwersytetu Poznanskiego 10, 61-614 Poznan, PolandCentre for Advanced Technologies, Adam Mickiewicz University in Poznan, ul. Uniwersytetu Poznanskiego 10, 61-614 Poznan, PolandFaculty of Chemistry, Adam Mickiewicz University in Poznan, ul. Uniwersytetu Poznanskiego 8, 61-614 Poznan, PolandFaculty of Chemistry, Adam Mickiewicz University in Poznan, ul. Uniwersytetu Poznanskiego 8, 61-614 Poznan, PolandCentre for Advanced Technologies, Adam Mickiewicz University in Poznan, ul. Uniwersytetu Poznanskiego 10, 61-614 Poznan, PolandA series of binary oxide systems with Ca/Si molar ratios of 0.05, 0.1, 0.25, 0.5 and 1.0 have been synthesized by the sol-gel technique from tetraethyl orthosilicate (TEOS) and metallic calcium powder. Upon calcination, a side effect of wollastonite formation as a result of the reaction between the components of the material has been observed in the two calcium-richest systems. The increase in calcium content produces an effect of porosity promotion. At high calcium contents, the homogeneity of the systems is limited by the ability of silica to disperse the calcium component. The properties of these systems are determined by the silica surface coverage with a large amount of the scattered CaCO<sub>3</sub> fine microcrystallites (calcite), resulting from the phase segregation. The gels were characterized by X-ray powder diffraction, low temperature nitrogen adsorption, transmission and scanning electron microscopy (TEM, SEM and SEM/EDS), thermogravimetric analysis (TGA), and FT-IR spectra, to describe the parameters important from the point of view of their application as a support for metal-based catalysts.https://www.mdpi.com/2571-6131/4/2/22sol-gelmetallic precursorCaOSiO<sub>2</sub>one-potCaCO<sub>3</sub> |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Piotr Marciniak Bogna Sztorch Agnieszka Martyła Agnieszka Czapik Mikołaj Stodolny Robert E. Przekop |
spellingShingle |
Piotr Marciniak Bogna Sztorch Agnieszka Martyła Agnieszka Czapik Mikołaj Stodolny Robert E. Przekop Metallic Calcium as a Precursor for Sol-Gel Synthesis of CaCO<sub>3</sub>-SiO<sub>2</sub> and CaO-SiO<sub>2</sub> Systems Ceramics sol-gel metallic precursor CaO SiO<sub>2</sub> one-pot CaCO<sub>3</sub> |
author_facet |
Piotr Marciniak Bogna Sztorch Agnieszka Martyła Agnieszka Czapik Mikołaj Stodolny Robert E. Przekop |
author_sort |
Piotr Marciniak |
title |
Metallic Calcium as a Precursor for Sol-Gel Synthesis of CaCO<sub>3</sub>-SiO<sub>2</sub> and CaO-SiO<sub>2</sub> Systems |
title_short |
Metallic Calcium as a Precursor for Sol-Gel Synthesis of CaCO<sub>3</sub>-SiO<sub>2</sub> and CaO-SiO<sub>2</sub> Systems |
title_full |
Metallic Calcium as a Precursor for Sol-Gel Synthesis of CaCO<sub>3</sub>-SiO<sub>2</sub> and CaO-SiO<sub>2</sub> Systems |
title_fullStr |
Metallic Calcium as a Precursor for Sol-Gel Synthesis of CaCO<sub>3</sub>-SiO<sub>2</sub> and CaO-SiO<sub>2</sub> Systems |
title_full_unstemmed |
Metallic Calcium as a Precursor for Sol-Gel Synthesis of CaCO<sub>3</sub>-SiO<sub>2</sub> and CaO-SiO<sub>2</sub> Systems |
title_sort |
metallic calcium as a precursor for sol-gel synthesis of caco<sub>3</sub>-sio<sub>2</sub> and cao-sio<sub>2</sub> systems |
publisher |
MDPI AG |
series |
Ceramics |
issn |
2571-6131 |
publishDate |
2021-06-01 |
description |
A series of binary oxide systems with Ca/Si molar ratios of 0.05, 0.1, 0.25, 0.5 and 1.0 have been synthesized by the sol-gel technique from tetraethyl orthosilicate (TEOS) and metallic calcium powder. Upon calcination, a side effect of wollastonite formation as a result of the reaction between the components of the material has been observed in the two calcium-richest systems. The increase in calcium content produces an effect of porosity promotion. At high calcium contents, the homogeneity of the systems is limited by the ability of silica to disperse the calcium component. The properties of these systems are determined by the silica surface coverage with a large amount of the scattered CaCO<sub>3</sub> fine microcrystallites (calcite), resulting from the phase segregation. The gels were characterized by X-ray powder diffraction, low temperature nitrogen adsorption, transmission and scanning electron microscopy (TEM, SEM and SEM/EDS), thermogravimetric analysis (TGA), and FT-IR spectra, to describe the parameters important from the point of view of their application as a support for metal-based catalysts. |
topic |
sol-gel metallic precursor CaO SiO<sub>2</sub> one-pot CaCO<sub>3</sub> |
url |
https://www.mdpi.com/2571-6131/4/2/22 |
work_keys_str_mv |
AT piotrmarciniak metalliccalciumasaprecursorforsolgelsynthesisofcacosub3subsiosub2subandcaosiosub2subsystems AT bognasztorch metalliccalciumasaprecursorforsolgelsynthesisofcacosub3subsiosub2subandcaosiosub2subsystems AT agnieszkamartyła metalliccalciumasaprecursorforsolgelsynthesisofcacosub3subsiosub2subandcaosiosub2subsystems AT agnieszkaczapik metalliccalciumasaprecursorforsolgelsynthesisofcacosub3subsiosub2subandcaosiosub2subsystems AT mikołajstodolny metalliccalciumasaprecursorforsolgelsynthesisofcacosub3subsiosub2subandcaosiosub2subsystems AT roberteprzekop metalliccalciumasaprecursorforsolgelsynthesisofcacosub3subsiosub2subandcaosiosub2subsystems |
_version_ |
1721351809157562368 |