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[CTF-TPMs] Design and synthesis of novel pyridine-rich cationic CTFs for CCUS
Summary:
The authors from Tiangong University developed a novel pyridine-rich cationic covalent triazine framework (CTF-TPM) with high CO2 adsorption capacity and catalytic performance for CO2 cycloaddition reactions.
Background:
1. To address the increasing CO2 emissions and their environmental impact, previous researchers have explored various materials for CO2 capture and conversion, achieving some success. However, challenges remain in developing materials with high stability, recyclability, and catalytic efficiency.
2. The authors proposed an innovative method to synthesize cationic CTFs (CCTFs) using an ionothermal trimerization reaction with ZnCl2 as both catalyst and reaction medium, obtaining materials with high stability and catalytic performance.
Research Content:
1. Synthesis:
The authors synthesized the cationic CTFs (CTF-TPMs) using an ionothermal trimerization reaction with ZnCl2 as the catalyst and reaction medium.
2. Characterizations:
1) BET results showed specific surface areas of 715 m²/g for CTF-TPM-400 and 1206 m²/g for CTF-TPM-500, with pore sizes ranging from 1.5 to 6 nm.
2) SEM images revealed uniform spherical morphologies with particle sizes of approximately 20 nm.
3) XPS and FTIR tests confirmed the presence of pyridine cations and free Cl−, indicating the successful synthesis of the cationic framework.
3. Application:
The CTF-TPMs demonstrated high CO2 adsorption capacities (up to 61.4 cc/g at 1 bar and 273 K) and excellent catalytic performance for CO2 cycloaddition reactions with various epoxides, achieving yields over 90% under mild conditions.
4. Mechanism:
The analysis of experimental results indicated that the synergistic effect of pyridine cations and free Cl− enhanced CO2 adsorption and catalytic activity. The high specific surface area and rich acid-base sites facilitated the diffusion and reaction of substrates and products.
Outlook:
This research presents a novel and efficient platform for CO2 capture and conversion using cationic CTFs. The strategic design of CTF-TPMs highlights their potential for practical applications due to their high stability, recyclability, and catalytic performance.
Design and synthesis of novel pyridine-rich cationic covalent triazine framework for CO2 capture and conversion
Authors: Yuliang Zhao, Hongliang Huang, Hejin Zhu, Chongli Zhong
DOI: 10.1016/j.micromeso.2021.111526
Link: https://www.sciencedirect.com/science/article/pii/S0920586124001652
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