Syntheses of Nanostructured Magnesium Carbonate Powders with Mesoporous Structures from Carbon Dioxide
| Autor: | José E. Ortiz-Castillo, Alejandro J. García-Cuéllar, José L. López-Salinas, César García-Pérez, Orlando Castilleja-Escobedo, Erika López-Lara, Fernando J. Rodríguez-Macías, Yadira I. Vega-Cantú |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Coprecipitation chemistry.chemical_element 02 engineering and technology 010402 general chemistry lcsh:Technology 01 natural sciences lcsh:Chemistry chemistry.chemical_compound supercritical carbon dioxide General Materials Science lcsh:QH301-705.5 Instrumentation Fluid Flow and Transfer Processes Acicular Supercritical carbon dioxide Aqueous solution lcsh:T Magnesium Process Chemistry and Technology General Engineering 021001 nanoscience & nanotechnology carbon sequestration lcsh:QC1-999 0104 chemical sciences Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 chemistry Chemical engineering lcsh:TA1-2040 magnesium carbonate Carbon dioxide Carbonate lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Mesoporous material porous materials lcsh:Physics |
| Zdroj: | Applied Sciences Volume 11 Issue 3 Applied Sciences, Vol 11, Iss 1141, p 1141 (2021) |
| ISSN: | 2076-3417 |
| Popis: | In this work, we present the results of two synthesis approaches for mesoporous magnesium carbonates, that result in mineralization of carbon dioxide, producing carbonate materials without the use of cosolvents, which makes them more environmentally friendly. In one of our synthesis methods, we found that we could obtain nonequilibrium crystal structures, with acicular crystals branching bidirectionally from a denser core. Both Raman spectroscopy and X-ray diffraction showed these crystals to be a mixture of sulfate and hydrated carbonates. We attribute the nonequilibrium morphology to coprecipitation of two salts and short synthesis time (25 min). Other aqueous synthesis conditions produced mixtures of carbonates with different morphologies, which changed depending on drying temperature (40 or 100 ° C). In addition to aqueous solution, we used supercritical carbon dioxide for synthesis, producing a hydrated magnesium carbonate, with a nesquehonite structure, according to X-ray diffraction. This second material has smaller pores (1.01 nm) and high surface area. Due to their high surface area, these materials could be used for adsorbents and capillary transport, in addition to their potential use for carbon capture and sequestration. |
| Databáze: | OpenAIRE |
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