Pure and strontium carbonate nanoparticles functionalized microporous carbons with high specific surface areas derived from chitosan for CO2 adsorption

Singh, Gurwinder; Tiburcius, Steffi; Ruban, Sujanya Maria; Shanbhag, Dhanush; Sathish, C. I.; Ramadass, Kavitha; Vinu, Ajayan

Title: Pure and strontium carbonate nanoparticles functionalized microporous carbons with high specific surface areas derived from chitosan for CO2 adsorption
Creator: Singh, Gurwinder; Tiburcius, Steffi; Ruban, Sujanya Maria; Shanbhag, Dhanush; Sathish, C. I.; Ramadass, Kavitha; Vinu, Ajayan
Relation: Emergent Materials Vol. 2, Issue 3, p. 337-349
Publisher Link: http://dx.doi.org/10.1007/s42247-019-00050-8
Publisher: Springer
Resource Type: journal article
Date: 2019
Description: A simple one step chemical activation involving a relatively mild chemical potassium citrate and inexpensive chitosan as a carbon source is presented for the synthesis of microporous carbons with a high specific surface area. The synthesis avoids the use of a highly corrosive and unfriendly activating agent, KOH, which is generally used for the creation of the porosity. The obtained microporous carbons display a high specific surface area which can be tuned by varying the amount of activating agent (1784–2278 m² g⁻¹). The optimized material exhibits a high surface area of 2278m² g⁻¹ and a pore volume of 1.00 cm³ g⁻¹. As high microporosity is beneficial for CO₂ adsorption, the prepared materials are employed as adsorbents for the capture of CO₂. The optimized sample displays excellent CO₂ uptakes at 0 °C/0.15 bar (1.1–1.8 mmol g⁻¹) and 0 °C/1 bar (4.3–6.1 mmol g⁻¹). The high surface area of the materials allows for high CO₂ uptakes at 0 °C/30 bar (17.3–22.0 mmol g⁻¹). The microporosity of these high surface area carbons is further decorated with strontium carbonate nanoparticles. The adsorption capacity per unit surface area is increased significantly upon the incorporation of the nanoparticles, revealing the role of the nanoparticles on the enhancement of the CO₂ adsorption capacity. A similar strategy could be extended for the fabrication of a series of microporous carbons derived from biomass for many applications including CO₂ capture.
Subject: microporous carbons; potassium citrate; chitosan; high surface area; high CO2 uptakes
Identifier: http://hdl.handle.net/1959.13/1461282
Identifier: uon:46157
Identifier: ISSN:2522-5731
Language: eng
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