We have developed a simple and general synthesis strategy to tune the chemical composition and pore size as well as the surface area of microporous ceramics. This method is based on modifying the structure of preceramic polymers through chemical reactions with NH3 at 300-800 degrees C, followed by thermolysis under an Ar atmosphere at 750 degrees C. Under these synthesis conditions polysiloxane (SPR-212a, Starfire (R) Systems) and polysilazane (HTT-1800, KiON Specialty Polymers) transform to microporous ceramics, while materials derived from polycarbosilane (SMP-10, Starfire (R) Systems) remain non-porous, as revealed by N-2 and CO2 adsorption isotherms. Small angle X-ray scattering (SAXS) characterization indicates that samples prepared fr...
In this work, mesoporous oxides, namely silica, titania and zirconia were synthesised using a triblo...
In the present work new methods were developed for preparation of novel nanosized and nanostructured...
The preparation of ordered macroporous SiCN ceramics has attracted significant interest and is an at...
We have developed a simple and general synthesis strategy to tune the chemical composition and pore ...
Our society depends overwhelmingly on carbon based resources (coal, natural gas and oil). The use of...
Solid-state nuclear magnetic resonance (NMR) spectroscopy, total X-ray scattering with a pair distri...
Polyalkoxysilsesquiazanes ([ROSi(NH)1.5]n, ROSZ, R = Et, nPr, iPr, nBu, sBu, nHex, sHex, cHex, decah...
The pyrolysis of polycarbosilane (PCS), a ceramic precursor polymer, at temperatures up to 700 uC un...
Carbon dioxide (CO2) capture is regarded as one of the biggest challenges of the 21st century; there...
Polymer derived porous silicon oxycarbide (SiOC) ceramics show higher heat resistance than that of S...
Several polysilanes with different overall functionalities have been synthesized and pyrolyzed to pr...
Porous, silicon carbonitride-based ceramic support structures for potential membrane and catalysis a...
Synthesis of carbon by extraction of metals from carbides has been successfully used to produce a va...
Nanoporous silicon carbide materials were prepared by the pyrolysis of the preceramic polymer, polyc...
Micro- and macro-cellular SiCN and SiOCN foams were produced via two different routes by using a pol...
In this work, mesoporous oxides, namely silica, titania and zirconia were synthesised using a triblo...
In the present work new methods were developed for preparation of novel nanosized and nanostructured...
The preparation of ordered macroporous SiCN ceramics has attracted significant interest and is an at...
We have developed a simple and general synthesis strategy to tune the chemical composition and pore ...
Our society depends overwhelmingly on carbon based resources (coal, natural gas and oil). The use of...
Solid-state nuclear magnetic resonance (NMR) spectroscopy, total X-ray scattering with a pair distri...
Polyalkoxysilsesquiazanes ([ROSi(NH)1.5]n, ROSZ, R = Et, nPr, iPr, nBu, sBu, nHex, sHex, cHex, decah...
The pyrolysis of polycarbosilane (PCS), a ceramic precursor polymer, at temperatures up to 700 uC un...
Carbon dioxide (CO2) capture is regarded as one of the biggest challenges of the 21st century; there...
Polymer derived porous silicon oxycarbide (SiOC) ceramics show higher heat resistance than that of S...
Several polysilanes with different overall functionalities have been synthesized and pyrolyzed to pr...
Porous, silicon carbonitride-based ceramic support structures for potential membrane and catalysis a...
Synthesis of carbon by extraction of metals from carbides has been successfully used to produce a va...
Nanoporous silicon carbide materials were prepared by the pyrolysis of the preceramic polymer, polyc...
Micro- and macro-cellular SiCN and SiOCN foams were produced via two different routes by using a pol...
In this work, mesoporous oxides, namely silica, titania and zirconia were synthesised using a triblo...
In the present work new methods were developed for preparation of novel nanosized and nanostructured...
The preparation of ordered macroporous SiCN ceramics has attracted significant interest and is an at...