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Materials 2019, 12(6), 844; https://doi.org/10.3390/ma12060844

Effects of Alkali Metal (Li, Na, and K) Incorporation in NH2–MIL125(Ti) on the Performance of CO2 Adsorption

1
School of Materials Science and Engineering, Chang’an University, Xi’an 710061, China
2
School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
*
Authors to whom correspondence should be addressed.
Received: 9 January 2019 / Revised: 26 February 2019 / Accepted: 8 March 2019 / Published: 13 March 2019
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Abstract

A series of titanium-based, metal–organic framework (MOF) materials, x[email protected]2-MIL125(Ti) (x is the alkali metal loading percentage during the synthesis; M = Li, Na, K), have been synthesized solvothermally. Alkali metal doping in the NH2–MIL125(Ti) in situ solvothermal process demonstrated a vital modification of the material structure and surface morphology for the CO2 adsorption capacity at ambient conditions. By changing the reactants’ precursor, including different kinds of alkali metal, the morphology of x[email protected]2–MIL125(Ti) can be adjusted from a tetragonal plate through a circular plate to a truncated octahedron. The variation of the alkali metal loading results in substantial differences in the CO2 adsorption. The properties of x[email protected]2–MIL125(Ti) were evaluated via functional group coordination using FT-IR, phase identification based on X-ray diffraction (XRD), surface morphology through scanning electron microscopy (SEM), as well as N2 and CO2 adsorption by physical gas adsorption analysis. This work reveals a new pathway to the modification of MOF materials for high-efficiency CO2 adsorption. View Full-Text
Keywords: alkali metal; CO2 adsorption; metal-organic frameworks; NH2-MIL125 alkali metal; CO2 adsorption; metal-organic frameworks; NH2-MIL125
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Song, L.; Xue, C.; Xia, H.; Qiu, S.; Sun, L.; Chen, H. Effects of Alkali Metal (Li, Na, and K) Incorporation in NH2–MIL125(Ti) on the Performance of CO2 Adsorption. Materials 2019, 12, 844.

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