Gas sorption properties and kinetics of porous bismuth-based metal-organic frameworks and the selective CO2 and SF6 sorption on a new bismuth trimesate-based structure UU-200

被引:33
作者
Ahlen, Michelle [1 ]
Kapaca, Elina [2 ]
Hedbom, Daniel [1 ]
Willhammar, Tom [2 ]
Stromme, Maria [1 ]
Cheung, Ocean [1 ]
机构
[1] Uppsala Univ, Dept Mat Sci & Engn, Div Nanotechnol & Funct Mat, Angstrom Lab, Box 35, SE-75103 Uppsala, Sweden
[2] Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden
基金
瑞典研究理事会;
关键词
Bismuth; Metal-organic frameworks; Porosity; Greenhouse gas capture; Adsorption kinetics; NEGATIVE THERMAL-EXPANSION; CARBON-DIOXIDE ADSORPTION; SEPARATION; DIFFUSION; CAPTURE; ELUCIDATION; MIL-53; ACID; MOFS; 4A;
D O I
10.1016/j.micromeso.2021.111548
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Bismuth-based metal-organic frameworks (Bi-MOFs) such as bismuth subgallate are important for applications ranging from medicine to gas separation and catalysis. Due to the porous nature of such Bi-MOFs, it would be valuable to understand their gas sorption and separation properties. Here, we present the gas sorption properties of three microporous Bi-MOFs, namely, CAU-17, CAU-33, and SU-101, along with a new trimesate-based structure, UU-200. We perform a detailed analysis of the sorption properties and kinetics of these Bi-MOFs. UU-200 shows good uptake capacities for CO2 (45.81 cm(3) g(-1) STP) and SF6 (24.69 cm(3) g(-1) STP) with CO2/N-2 and SF6/N-2 selectivities over 35 and 44, respectively at 293 K, 100 kPa. The structure of UU-200 is investigated using continuous rotation electron diffraction and is found to be a 3D porous framework containing pores with a diameter of 3.4-3.5 angstrom. Bi-MOFs as a group of relatively under-investigated types of MOFs have interesting sorption properties that render them promising for greenhouse gas adsorbents with good gas uptake capacities and high selectivities.
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页数:12
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