Mesoporous isocyanurate-containing organosilica–alumina composites and their thermal treatment in nitrogen for carbon dioxide sorption at elevated temperatures

Gunathilake, Chamila; Gangoda, Mahinda; Jaroniec, Mietek

doi:10.1039/c3ta11113j

Cited by 24 publications

(44 citation statements)

References 47 publications

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“…The powder XRD analysis was performed to check the crystallinity of the MgO-Al 2 O 3 samples studied. As expected this analysis showed that the samples are amorphous because their thermal treatment was carried out at relatively low temperature, 400 o C[19]. However, the presence of Mg and Al in the composite by the EDX analysis (seeFigure 5), indicating that the added Al(NO 3 ) 3 •9H 2 O and Mg(NO 3 ) 2 .6H 2 O have been transformed to respective oxides.…”

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confidence: 66%

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Development of mesoporous magnesium oxide–alumina composites for CO2 capture

Wang

Gunathilake

Jaroniec

2016

Journal of CO2 Utilization

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Mesoporous magnesium oxide-alumina composites were synthesized by evaporation induced self assembly (EISA) in the presence of triblock copolymer Pluronic P123 in absolute ethanol solution. These mesostuctures were prepared usingAl(NO 3 ) 3 •9H 2 O and Mg(NO 3 ) 2 .6H 2 O as alumina and MgO precursors, respectively. Block copolymer was completely removed by thermal treatment of as-synthesized samples at 350 o C in flowing nitrogen. Thermally treated composites displayed relativelyhigh specific surface area and large pore volume. Temperature programmed desorption (TPD) was used to investigate the active sites available on the surface of the aforementioned samples for CO 2 sorption at 120 o C. Magnesium oxide-alumina composite samples showed an enhanced CO 2 uptake under flue gas conditions (100~150 o C). The sample synthesized from Al(NO 3 ) 3 •9H 2 O) only showed adsorption capacity of about 1.30 mmol/g.Incorporation of 10 molar % of MgO did not significantly increase the CO 2 uptake of the alumina-based composite; however, incorporation of 30 molar % of MgO increased CO 2 uptake up to 2.08 mmol/g. An increase of the MgO content in the composite caused a gradual enhancement in the CO 2 uptake; namely, the composite with 70 % of MgO loading showed 2.87 mmol/g CO 2 uptake. High thermal and mechanical stability of the composites studied as well as their low cost, good resistance to the corrosion and oxidizing environment make these materials, especially MgO-rich composites, attractive candidates for CO 2 capture at flue gas conditions.

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confidence: 66%

“…The CO 2 capacities measured on a MgO-Al 2 O 3 composite sorbent at 60 o C were equal to 0.97 and 1.36 mmol/g in the presence (13%) and absence (0%) of water vapor, respectively [18]. The highest value of CO 2 uptake obtained formesoporousisocyanuratecontainingorganosilica-alumina composites at 120 o C was of about 2.2 mmol/g [19].…”

Section: Co 2 Chemisorptionmentioning

confidence: 99%

Development of mesoporous magnesium oxide–alumina composites for CO2 capture

Wang

Gunathilake

Jaroniec

2016

Journal of CO2 Utilization

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“…As a result, an increasing number of research communications, articles and reviews are being reported every day. The work performed by Jaroniec et al., Stucky et al., Antonelli et al., Bhaumik et al., Zhao et al., and Ryoo et al . are worth mentioning here.…”

Section: Introductionmentioning

confidence: 81%

Ceria‐Containing Ordered Mesoporous Silica: Synthesis, Properties, and Applications

et al. 2015

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Structural architecture and unique physical, chemical, thermal, and mechanical properties of ordered mesoporous silica materials can be tuned. High flexibility of silica materials can provide good support for different metal nanoparticles, metal oxides, and organic functional groups. The properties of silica materials can vary to a great extent by introducing the optimum amount of metal species co‐doped, dispersed or composites with the silica mesostructure. The present study investigates the deposition of CeIII/IV/CeO2 on the silica surface by using different wet chemical engineering methods, illustrates the syntheses of those ceria–silica or metal doped ceria–silica nanomaterials and offers clear picture of the influence that incorporated ceria concentration has on the properties of the support material. Ceria–silica based ordered mesoporous materials can have numerous applications is also discussed in this article, emphasizing its use as a heterogeneous catalyst in particular.

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“…Nitrogen adsorption isotherms were collected at −196 • C on an ASAP 2010 volumetric analyzer (Micromeritics, Inc., Norcross, GA, USA). All samples were degassed under vacuum at 110 • C for 2 h [31][32][33][34] prior to the adsorption measurements.…”

Section: Measurementsmentioning

confidence: 99%

Facile Synthesis and Surface Characterization of Titania-Incorporated Mesoporous Organosilica Materials

et al. 2019

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Titania-incorporated organosilica-mesostructures (Ti-MO) were synthesized using tris [3-(trimethoxysilyl)propyl]isocyanurate, tetraethylorthosilicate as silica precursors, and titanium isopropoxide as the titanium precursor via a co-condensation method in the presence of the triblock copolymer, Pluronic P123. The triblock copolymer was completely removed by extraction with a 95% ethanol solution, followed by a thermal treatment at 350 °C under flowing nitrogen without decomposing isocyanurate bridging groups. The molar ratio of titanium to silica in the mesostructures was gradually changed by increasing the amount of tetraethylorthosilicate in the initial reaction mixture. Our synthesis strategy also allowed us to tailor both adsorption and structural properties, including a well-developed specific surface area, high microporosity, and large pore volume. A portion of the samples was thermally treated at 600 °C to remove both the block copolymer and bridging groups. The thermal treatment at 600 °C was used to convert the amorphous titania into a crystalline anatase form. The Ti-MO materials were characterized using a N2 adsorption desorption analysis, thermogravimetric analysis (TGA), solid state nuclear magnetic resonance (NMR), transmission electron microscope (TEM), and X-ray powder diffraction (XRD). CO2 adsorption studies were also conducted to determine the basicity of the Ti-MO materials. The effect of the surface properties on the CO2 sorption was also identified.

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Mesoporous isocyanurate-containing organosilica–alumina composites and their thermal treatment in nitrogen for carbon dioxide sorption at elevated temperatures

Cited by 24 publications

References 47 publications

Development of mesoporous magnesium oxide–alumina composites for CO2 capture

Development of mesoporous magnesium oxide–alumina composites for CO2 capture

Ceria‐Containing Ordered Mesoporous Silica: Synthesis, Properties, and Applications

Facile Synthesis and Surface Characterization of Titania-Incorporated Mesoporous Organosilica Materials

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