共 56 条
Two-dimensional oxalamide based isostructural MOFs for CO2 capture
被引:5
作者:
Guclu, Yunus
[1
]
Erer, Hakan
[2
]
Demiral, Hakan
[3
]
Zorlu, Yunus
[4
]
Altintas, Cigdem
[5
]
Keskin, Seda
[5
]
Semerci, Fatih
[1
]
机构:
[1] Kirklareli Univ, Fac Technol, Dept Energy Syst Engn, TR-39100 Kirklareli, Turkey
[2] Eskisehir Osmangazi Univ, Fac Sci & Letters, Dept Chem, TR-26040 Eskisehir, Turkey
[3] Eskisehir Osmangazi Univ, Dept Chem Engn, Fac Engn & Architecture, TR-26480 Eskisehir, Turkey
[4] Gebze Tech Univ, Dept Chem, TR-41400 Kocaeli, Turkey
[5] Koc Univ, Dept Chem & Biol Engn, TR-34450 Istanbul, Turkey
关键词:
Metal-organic frameworks;
Two-dimensional MOFs;
Oxalamide ligand;
CO2;
adsorption;
Molecular simulations;
METAL-ORGANIC FRAMEWORKS;
CARBON-DIOXIDE CAPTURE;
COORDINATION POLYMER;
POROUS MATERIALS;
GAS-ADSORPTION;
SEPARATION;
ACID;
SORPTION;
PORE;
FUNCTIONALITY;
D O I:
10.1016/j.jssc.2022.123778
中图分类号:
O61 [无机化学];
学科分类号:
070301 ;
081704 ;
摘要:
Metal-organic frameworks (MOFs), members of porous crystalline materials, have been investigated for CO2 capture and separation from various exhaust gas mixtures. An essential element to build new MOFs with improved CO2 capture and separation abilities is to understand the influence of functional groups on the surface of pores on gas adsorption properties. Oxalamide groups have two amide moieties that feature a strong affinity to CO2. In this study, three new isostructural Co(II), Zn(II), and Cd(II)-MOFs have been synthesized by using 3,3'-(oxalylbis(a-zanediyl))dibenzoic acid (3-OADAH2) ligand which has a CO2-philic oxalamide group. To the best of our knowledge 3,3'-(oxalylbis(azanediyl))dibenzoic acid (3-OADAH2) was used as a linker for the first time. X-ray diffraction analysis shows that the MOFs possess two-dimensional (2D) structures and the layers interact with each other through hydrogen bonds. Co-, Zn-, and Cd-3-OADA exhibit an excellent CO2 adsorption capacity of 8.87 wt% (45.15 cm3/g), 8.40 wt% (42.76 cm3/g), and 7.93 wt% (40.37 cm3/g) at 273 K and 3.98 wt% (20.27 cm3/g), 4.74 wt% (24.15 cm3/g), 3.68 wt% (18.72 cm3/g) at 298 K under 1 bar with isosteric heat of adsorption values (Qst) of about 34, 25, and 33 kJ/mol, respectively. This work opens a new opportunity for the development of functionalized 2D-MOFs with high CO2 capture capacity.
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页数:6
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