Porous Cationic Covalent Triazine-Based Frameworks as Platforms for Efficient CO2 and Iodine Capture
Guangjuan Xu1, Yiang Zhu2, Wei Xie1
1Key Laboratory of Preparation and Applications of Environmental Friendly Materials of the Ministry of Education, Key Laboratory of Functional Materials Physics and Chemistry of the, Ministry of Education (Jilin Normal University), Changchun, 130103, China.
Chemistry, an Asian Journal
|August 24, 2019
Summary
New porous cationic covalent triazine-based frameworks (CTFs) efficiently capture CO2 and iodine. Researchers explored how counterions impact CTF properties for enhanced adsorption capabilities.
Area of Science:
- Materials Science
- Chemistry
Background:
- Covalent triazine-based frameworks (CTFs) are porous materials with tunable properties.
- Imidazolium salts can be incorporated as building blocks (tectons) in CTFs.
- The influence of counterions on CTF performance is not fully understood.
Purpose of the Study:
- To synthesize porous cationic CTFs using imidazolium salts.
- To investigate the effect of counterion species and content on CTF properties.
- To evaluate the CO2 adsorption and iodine capture capacities of the prepared CTFs.
Main Methods:
- Ionothermal synthesis was employed to prepare cationic CTFs.
- Characterization of porosity, CO2 adsorption, and iodine capture capacity was performed.
- Systematic variation of counterion species and content was conducted.
Main Results:
- A high-PF6- content CTF exhibited significant CO2 adsorption (44.7 cm3/g).
- The same CTF demonstrated a high iodine capture capacity (312 wt%).
- Counterion identity and concentration were found to influence porosity and adsorption performance.
Conclusions:
- Porous cationic CTFs with imidazolium tectons are effective for CO2 and iodine capture.
- Counterion engineering is a viable strategy to optimize CTF performance for gas adsorption and pollutant capture.
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