Preparation of cubic ordered mesoporous silicon carbide monoliths by pressure assisted preceramic polymer nanocasting

Wang, Jiacheng; Oschatz, Martin; Biemelt, Tim; Lohe, Martin R.; Borchardt, Lars; Kaskel, Stefan

doi:10.1016/j.micromeso.2012.09.037

Cited by 21 publications

(9 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is found that the relationship perfectly follows the exponential function y=0. However, the peak intensity is very weak and there is an absence of (220) peak suggest the low long-range ordering of sample S5 [41]. N 2 physisorption analysis was also used to disclose the porous characteristics of the resulting MMM-SFs.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Tailoring of Porous Structure in Macro-Meso-Microporous SiC Ultrathin FibersviaElectrospinning Combined with Polymer-Derived Ceramics Route

Wang

Lei

et al. 2015

Materials and Manufacturing Processes

View full text Add to dashboard Cite

Porous SiC has attracted extensive attention for its wide applications, especially in harsh environment, due to its unique properties. In the present paper, novel macro-meso-microporous SiC ultrathin fibers (MMM-SFs) were synthesized through electrospinning process associated with polymer-derived ceramics route. And the porous structure in the SFs can be conveniently tailored by tuning the composition of the spinning solvents and the concentration of the precursor (polycarbosilane). The surface features and microstructures of the resultant MMM-SFs were characterized in detail. These fibers presented a high specific surface area of 86.1-128.2 m 2 g -1 . The formation mechanism of hierarchically porous structure was discussed as well. DMF played a critical role in forming macropores, while the decomposition of SiO x C y phase was responsible for the Downloaded by [University of Otago] at 02:15 01 October 2015 2 meso-/micropores. Our method utilized to synthesize hierarchically porous SFs is easily capable to design other ceramic fibers.

show abstract

Section: Resultsmentioning

confidence: 99%

“…4B). The weak diffraction peak (211) implies the existence of mesoporous structure in the fibers[41].…”

mentioning

confidence: 99%

Tailoring of Porous Structure in Macro-Meso-Microporous SiC Ultrathin FibersviaElectrospinning Combined with Polymer-Derived Ceramics Route

Wang

Lei

et al. 2015

Materials and Manufacturing Processes

View full text Add to dashboard Cite

show abstract

“…Most common processes to obtain SiC need high temperatures, around 1150-1500°C (10-17), using different techniques as "nanocasting" (10,11), sol-gel (12)(13), molten salts (14), carbothermic reduction (15)(16)(17) and low temperature processes as magnesiothermic reduction method (18)(19)(20)(21); these methods use different materials as silicon precursors: SiO 2 (9,10,16-18), TEOS (12,13); and carbon: polycarbosilane (10,11), phenolic resine (12,13) graphite (17), resorcinol-formaldehyde (18,19).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Silicon Carbide in the Application of High Temperature Solar Surface Receptors

et al. 2014

View full text Add to dashboard Cite

The use of ceramic surfaces for thermal solar concentrators are not new, but the high costs of fabrication and limited thermal properties have banned the application of such at large scale. Silicon carbide (SiC) is well known due to its high thermo-mechanical properties and spectral absorbance. Because of its capacities to enhance the energy transfer and its resistance to high temperatures silicon carbide have been recognized in our group as a possible improvement to increase the efficiency of electric energy production. At nano-scale SiC shows high surface area and porosity that could be tuned, making it a state-of-the-art material to be used in the application of thermal solar receptors in "Central Tower" power plants. Although the advantages are favorable, the high temperature needs for its synthesis have been an issue for its spread. In the present work, we introduce a novel method to synthesize SiC powders at lower temperature (650°C) we present also its characterization for the potential application in the concentration of thermal solar energy at high temperatures.

show abstract

“…The template is then dissolved in a hydrogen fluoride (HF) solution to generate the replicated monoliths. This has been reported for SiC . However, consolidation of the tablet remains poor.…”

Section: Introductionmentioning

confidence: 99%

“…This has been reported for SiC. [26] However,c onsolidation of the tablet remainsp oor.H erein, we propose to 1) coat the porous structure of monolith-typet emplates as foams with particularp orosity through the impregnation of the pore template with ap re-ceramic polymer solution, 2) performingt he subsequentp yrolysis to achieve the precursor-to-ceramic conversion and then 3) removing the mold generating afoamw ith tailoredp orosity.…”

Section: Introductionmentioning

confidence: 99%

Polymer‐Derived Silicoboron Carbonitride Foams for CO₂ Capture: From Design to Application as Scaffolds for the in Situ Growth of Metal–Organic Frameworks

Sandra

Depardieu

Mouline

et al. 2016

Chemistry A European J

View full text Add to dashboard Cite

A template-assisted polymer-derived ceramic route is investigated for preparing a series of silicoboron carbonitride (Si/B/C/N) foams with a hierarchical pore size distribution and tailorable interconnected porosity. A boron-modified polycarbosilazane was selected to impregnate monolithic silica and carbonaceous templates and form after pyrolysis and template removal Si/B/C/N foams. By changing the hard template nature and controlling the quantity of polymer to be impregnated, controlled micropore/macropore distributions with mesoscopic cell windows are generated. Specific surface areas from 29 to 239 m(2) g(-1) and porosities from 51 to 77 % are achieved. These foams combine a low density with a thermal insulation and a relatively good thermostructural stability. Their particular structure allowed the in situ growth of metal-organic frameworks (MOFs) directly within the open-cell structure. MOFs offered a microporosity feature to the resulting Si/B/C/N@MOF composite foams that allowed increasing the specific surface area to provide CO2 uptake of 2.2 %.

show abstract

Preparation of cubic ordered mesoporous silicon carbide monoliths by pressure assisted preceramic polymer nanocasting

Cited by 21 publications

References 46 publications

Tailoring of Porous Structure in Macro-Meso-Microporous SiC Ultrathin FibersviaElectrospinning Combined with Polymer-Derived Ceramics Route

Tailoring of Porous Structure in Macro-Meso-Microporous SiC Ultrathin FibersviaElectrospinning Combined with Polymer-Derived Ceramics Route

Synthesis and Characterization of Silicon Carbide in the Application of High Temperature Solar Surface Receptors

Polymer‐Derived Silicoboron Carbonitride Foams for CO₂ Capture: From Design to Application as Scaffolds for the in Situ Growth of Metal–Organic Frameworks

Contact Info

Product

Resources

About

Preparation of cubic ordered mesoporous silicon carbide monoliths by pressure assisted preceramic polymer nanocasting

Cited by 21 publications

References 46 publications

Tailoring of Porous Structure in Macro-Meso-Microporous SiC Ultrathin FibersviaElectrospinning Combined with Polymer-Derived Ceramics Route

Tailoring of Porous Structure in Macro-Meso-Microporous SiC Ultrathin FibersviaElectrospinning Combined with Polymer-Derived Ceramics Route

Synthesis and Characterization of Silicon Carbide in the Application of High Temperature Solar Surface Receptors

Polymer‐Derived Silicoboron Carbonitride Foams for CO2 Capture: From Design to Application as Scaffolds for the in Situ Growth of Metal–Organic Frameworks

Contact Info

Product

Resources

About

Polymer‐Derived Silicoboron Carbonitride Foams for CO₂ Capture: From Design to Application as Scaffolds for the in Situ Growth of Metal–Organic Frameworks