A template-free, thermal decomposition method to synthesize mesoporous MgO with a nanocrystalline framework and its application in carbon dioxide adsorption

Bian, Shao‐Wei; Baltrušaitis, Jonas; Galhotra, Pragati; Grassian, Vicki H.

doi:10.1039/c0jm01261k

Cited by 145 publications

(119 citation statements)

References 42 publications

(53 reference statements)

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“…3a). 41,42,47 18 Therefore, while the arsenic species could adsorb onto the outer surface of the samples it can also diffuse into the pore channels and bind to the inner surface of the mesopores. 48 Owing to their hexagonally ordered mesopores, the aluminium magnesium oxides with <50% Mg (from meso-Al-400 to meso70Al30Mg-400) exhibit higher surface areas (>350 m 2 g −1 ) and larger pore volumes (>0.9 cm 3 g −1 ).…”

Section: Materials Synthesis and Characterizationmentioning

confidence: 99%

Extremely high arsenic removal capacity for mesoporous aluminium magnesium oxide composites

Chen

Xia

et al. 2016

Environ. Sci.: Nano

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; significantly higher than those of reported adsorbents. Exceptional adsorption capacities for arsenic are retained over a wide pH range, and high selectivity for AsĲV) is realized even in the presence of co-existing anions. The arsenic adsorption performance correlates to the properties of the composites including the Mg/Al ratio, point of zero charge, crystallinity and mesostructure. The arsenic adsorption mechanism is elucidated. Due to their high surface areas, large pore volumes, tunable mesopore structures and high quantities of accessible hydroxyl groups with strong chemisorption binding affinity to arsenic, as well as extremely high adsorption capacities and selectivity, these mesoporous aluminium magnesium oxides are promising adsorbent candidates for the remediation of arsenic in water.

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Section: Materials Synthesis and Characterizationmentioning

confidence: 99%

Extremely high arsenic removal capacity for mesoporous aluminium magnesium oxide composites

Chen

Xia

et al. 2016

Environ. Sci.: Nano

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“…Among these, solid adsorbents have been commonly fit for the integrated gasification combined cycles (IGCC) related pre-combustion CO 2 capture processes [4,5], e.g., sorption enhanced water gas shift (SEWGS) and sorption enhanced biomass reforming (SEBR) reactions [12][13][14][15]. Among the abundant solid adsorbents which tend to capture CO 2 at moderate temperatures [5,[14][15][16], layered double hydroxides (LDHs) derived metal oxides [17][18][19][20][21] and magnesium oxide (MgO) based compounds [22][23][24][25][26] are promising for the SEWGS and SEBR technologies in the temperature range of 200-400 • C [10,[27][28][29][30]. LDHs have the reputation of outstanding thermal stability and relatively fast CO 2 adsorption kinetics.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures

et al. 2017

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Abstract:In this work, we report on a novel sodium dodecyl sulfate (SDS)-assisted magnesium oxide (MgO)-based porous adsorbent synthesized by hydrothermal method for intermediate CO 2 capture. For industrial MgO, its CO 2 adsorption capacity is normally less than 0.06 mmol g −1 , with a specific surface area as low as 25.1 m 2 g −1 . Herein, leaf-like MgO nanosheets which exhibited a disordered layer structure were fabricated by the introduction of SDS surfactants and the control of other synthesis parameters. This leaf-like MgO adsorbent showed an excellent CO 2 capacity of 0.96 mmol g −1 at moderate temperatures (~300 • C), which is more than ten times higher than that of the commercial light MgO. This novel mesoporous MgO adsorbent also exhibited high stability during multiple CO 2 adsorption/desorption cycles. The excellent CO 2 capturing performance was believed to be related to its high specific surface area of 321.3 m 2 g −1 and abundant surface active adsorption sites. This work suggested a new synthesis scheme for MgO based CO 2 adsorbents at intermediate temperatures, providing a competitive candidate for capturing CO 2 from certain sorption enhanced hydrogen production processes.

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“…Surface areas in the range of 250-650 m 2 /g have been reached [14], although the template should be removed in subsequent steps. In an attempt to avoid the use of templates and toxic solvents, Bian et al [15] described a procedure to synthesize mesoporousMgO with a nanocrystalline framework via the thermal decomposition of magnesium acetate, obtaining surface areas around 120-136 m 2 /g. Another important synthetic route for the preparation of high surface area MgO involves thermal treatment of Mg(OH) 2 , obtained either by precipitation or by MgO hydration, leading to surface areas ranging 100-300 m 2 /g [14].…”

Section: Introductionmentioning

confidence: 99%

Consequences of MgO activation procedures on its catalytic performance for acetone self-condensation

León

Faba

Dı́az

et al. 2014

Applied Catalysis B: Environmental

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A new procedure for increasing surface area and basicity of MgO has been developed in this work, leading to a tailored catalyst for the self-condensation of acetone. The preparation method, consisting on the hydration/dehydration of periclase, was optimized varying theactivation procedures. The effect of the precursor (magnesium oxide or magnesium carbonate) and the thermal treatment on the morphological properties and the basic sites distribution was characterised.In particular, CO 2 calorimetry data attributed the increase of basic sites mainly to the increase in surface area. Thematerial was tested for the base-catalyzedself-condensation ofacetone, obtaining high conversions and selectivities towards the products of most industrial value, the isophorones. The selectivity reached to trimers at 723 K was almost 50 %, and towards isophorones, of more than 30 %.

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A template-free, thermal decomposition method to synthesize mesoporous MgO with a nanocrystalline framework and its application in carbon dioxide adsorption

Cited by 145 publications

References 42 publications

Extremely high arsenic removal capacity for mesoporous aluminium magnesium oxide composites

Extremely high arsenic removal capacity for mesoporous aluminium magnesium oxide composites

Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures

Consequences of MgO activation procedures on its catalytic performance for acetone self-condensation

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