Rapid temperature-assisted synthesis of nanoporous γ-cyclodextrin-based metal–organic framework for selective CO2 adsorption

Abstract

We present a rapid temperature-assisted synthesis route to synthesize cyclodextrin-based metalorganic frameworks (CD-MOFs) surfactant freely in a short time. The cubic crystals of CD-MOF with an average edge length of 10-15 m, specific surface area 775 m 2 g -1 and total pore volume 0.229 cm 3 g -1 were synthesized in much shorter time rather than conventional CD-MOFs. To show the efficiency of the synthesized CF-MOF as adsorbent of gas, the uptake of CO2 at different temperature and pressure demonstrated. It is shown that the CO2 uptake increases with increasing pressure and decreasing temperature. Further microgravimetric investigation on gas adsorption at low pressures demonstrated superior gas uptake (147 mg g -1 c.a.) than previous reports. At the maximum equilibrium pressure, the uptake amounts of CO2 were found to be about the 326 and 268 mg g -1 at 303 and 323 K, respectively. The synthesized CD-MOF particles have great potential to be used in gas storage and separation applications.

Porous Structure of β-Cyclodextrin for CO2 Capture: Structural Remodeling by Thermal Activation

“…Microporous carbon nanospheres have also been prepared from β-CD by solvothermal carbonization in o-dichlorobenzene with the presence of various concentrations of p-toluene sulfonic acid (PTSA) [ 58 ]. For the thermal activation, a rapid temperature-assisted synthesis has been reported to improve the porous structure of the cyclodextrins for CO 2 adsorption [ 59 ]. Regarding the pyrolysis stages [ 50 ], apparent activation energy and pyrolysis kinetics of the cyclodextrins [ 60 ] have been preliminarily investigated in some literature.…”

Cyclodextrin metal–organic frameworks and derivatives: recent developments and applications

“…Apart from the storage of single target compounds, CD-MOF based materials also show high potential in the selective separation of gases, hydrocarbons, isomers, benzenoid compounds and other mixtures. 90,101,158,159,169,[205][206][207][208] Thanks to the tailorable pore sizes and uncoordinated, weakly nucleophilic primary hydroxyl groups of CD-MOFs they could be significant even in large-scale industrial processes, for instance during acetylene (C 2 H 2 ) gas synthesis where minor fractions of CO 2 are formed as a side-product. To remove trace amounts of CO 2 from a mixture with C 2 H 2 , Li et al synthesized a K-and a Rb-g-CD-MOF which showed inverse adsorption abilities.…”

Synthesis and potential applications of cyclodextrin-based metal–organic frameworks: a review

“…On the other hand, amino groups were introduced to the β-cyclodextrin-based metal–organic framework to enhance the carbon dioxide capture capacity of the β-cyclodextrin-based metal–organic framework from 1.2 to 12.3 cm 3 /g at 273 K as well as enhancing the water stability from 18 to 24 mg/mL, and this is due to the polar nature of β-cyclodextrin (Xu et al 2020 ). Moreover, a γ-cyclodextrin-based metal–organic framework with crystalline morphology and surface area reaching 775 m 2 /g and a pore volume of 0.229 cm 3 /g was synthesized by vapor diffusion method at high temperature and pressure (Hamedi et al 2021 ). Hamedi et al ( 2021 ) found that the carbon dioxide capture increased with raising pressure and lowering.…”

“…Moreover, a γ-cyclodextrin-based metal–organic framework with crystalline morphology and surface area reaching 775 m 2 /g and a pore volume of 0.229 cm 3 /g was synthesized by vapor diffusion method at high temperature and pressure (Hamedi et al 2021 ). Hamedi et al ( 2021 ) found that the carbon dioxide capture increased with raising pressure and lowering. Besides, the maximum carbon dioxide capture of γ-cyclodextrin-based metal–organic framework reached as high as 326 mg/g at 303 K. Moreover, Wang et al ( 2018 ) prepared γ-cyclodextrin-based metal–organic framework-potassium with excellent adsorption capacity for formaldehyde.…”