Li2SiO3 fast microwave-assisted hydrothermal synthesis and evaluation of its water vapor and CO2 absorption properties--颗粒学报PARTICUOLOGY

Ortiz-Landeros, J., López-Juárez, R., Romero-Ibarra, I. C., Pfeiffer, H., Balmori-Ramírez, H., & Gómez-Yáñez, C. (2016). Li2SiO3 fast microwave-assisted hydrothermal synthesis and evaluation of its water vapor and CO2 absorption properties. Particuology, 24, 129-137. https://doi.org/10.1016/j.partic.2015.03.007

Li₂SiO₃ fast microwave-assisted hydrothermal synthesis and evaluation of its water vapor and CO₂ absorption properties

J. Ortiz-Landeros ^a *, R. López-Juárez ^b, I.C. Romero-Ibarra ^c, H. Pfeiffer ^d, H. Balmori-Ramírez ^a, C. Gómez-Yáñez ^a

a Department of Metallurgical and Materials Engineering, National Polytechnic Institute, ESIQIE-IPN, UPALM Campus, Instituto Politécnico Nacional Avenue, 07738 Mexico City, Mexico
b Materials Research Institute Morelia Campus, National Autonomous University of Mexico, Old Pátzcuaro road 8701, 58190 Morelia, Michoacán, Mexico
c Department of Chemistry, Metropolitan Autonomous University, Iztapalapa Campus, San Rafael Atlixco Avenue 186, 09340 Mexico City, Mexico
d Materials Research Institute, National Autonomous University of Mexico, Cd Universitaria Campus, 04510 Mexico City, Mexico

10.1016/j.partic.2015.03.007

Volume 24, February 2016, Pages 129-137

Received 7 January 2015, Revised 16 March 2015, Accepted 21 March 2015, Available online 21 August 2015, Version of Record 21 January 2016.

E-mail: jortizla@ipn.mx

Highlights

• Nanocrystalline Li₂SiO₃ powders were synthesized via microwave-assisted hydrothermal method.

• Pure Li₂SiO₃ phase was obtained using short reaction time at low temperature.

• Li₂SiO₃ particles exhibited hollow sphere morphologies and high specific surface area.

• Water vapor and CO₂ capture properties were evaluated by thermogravimetric analysis.

• Exhibited properties suggested potential applications of Li₂SiO₃ as catalyst and CO₂ sorbents.

Abstract

A series of lithium metasilicate (Li₂SiO₃) powder materials has been successfully synthesized by the microwave-assisted hydrothermal route using lithium hydroxide and tetraethyl-orthosilicate-derived sol precursors. Ceramic powders were obtained under hydrothermal conditions of autogenous pressure in the presence of a nonionic surfactant. The production of pure and well-crystallized Li₂SiO₃ using very short reaction times at low temperatures was shown by X-ray diffraction, scanning electron microscopy, and N₂ adsorption-desorption analyses. Synthesized Li₂SiO₃ particles were nanocrystalline and exhibited different morphologies and specific surface areas depending on the synthesis conditions. Additionally, the capability of selected Li₂SiO₃ samples to absorb H₂O and CO₂ was evaluated via thermogravimetric analyses by varying the temperature, carrier gas, and water vapor concentration. Li₂SiO₃ particles exhibited interesting textural and morphological characteristics that make them suitable for use as a CO₂ absorbent and which suggest that they also have the potential to be used in other applications.

Graphical abstract

Keywords

CO₂ capture; Lithium metasilicate; Hydrothermal synthesis; Thermal analysis

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