TY - JOUR
T1 - Fluorinated covalent triazine frameworks for effective CH4 separation and iodine vapor uptake
AU - Tu, Poyi
AU - He, Xunming
AU - Abu-Reziq, Raed
AU - Pan, Chunyue
AU - Tang, Juntao
AU - Yu, Guipeng
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - In this article, analogous covalent triazine framework (CTFs) were simply prepared through the trimerization of different nitrile building blocks (tetrafluoroterephthalonitrile or terephthalonitrile) under typical ionothermal conditions. We demonstrated that the fluorine contents could be simply altered by changing the comonomer compositions. Introducing fluorine could adjust the pore size distribution and electron structure of the network effectively. By increasing fluorine contents, an enhanced CO2/CH4 selectivity up to 15.5 was presented. Additionally, electron-concentrated fluorine strengthened CH/π interactions between the polymeric matrixes and guest CH4, offering a CH4/N2 selectivity up to 8.0. The obtained CTFs also exhibited noticeable iodine adsorption capacity in vapor phase (302 wt%) due to their abundance of heteroatoms and porosity. These results clearly demonstrated the promising aspect of introducing fluorine groups into the porous networks for developing efficient sorbent towards potential applications in separating methane gas or iodine vapors and also affording further insight into the development of high performance functional polymers.
AB - In this article, analogous covalent triazine framework (CTFs) were simply prepared through the trimerization of different nitrile building blocks (tetrafluoroterephthalonitrile or terephthalonitrile) under typical ionothermal conditions. We demonstrated that the fluorine contents could be simply altered by changing the comonomer compositions. Introducing fluorine could adjust the pore size distribution and electron structure of the network effectively. By increasing fluorine contents, an enhanced CO2/CH4 selectivity up to 15.5 was presented. Additionally, electron-concentrated fluorine strengthened CH/π interactions between the polymeric matrixes and guest CH4, offering a CH4/N2 selectivity up to 8.0. The obtained CTFs also exhibited noticeable iodine adsorption capacity in vapor phase (302 wt%) due to their abundance of heteroatoms and porosity. These results clearly demonstrated the promising aspect of introducing fluorine groups into the porous networks for developing efficient sorbent towards potential applications in separating methane gas or iodine vapors and also affording further insight into the development of high performance functional polymers.
KW - Covalent Triazine Frameworks
KW - Fluorine
KW - Iodine Vapor Adsorption
KW - Methane Separation
UR - http://www.scopus.com/inward/record.url?scp=85126636020&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2022.120857
DO - 10.1016/j.seppur.2022.120857
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AN - SCOPUS:85126636020
SN - 1383-5866
VL - 290
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 120857
ER -