新型甲基功能化共价有机框架材料的制备及二氧化碳吸附性能
Synthesis and CO2 uptake performance of novel methyl functionalized covalent organic frameworks
陈田 1郑琦 2王连军 2江莞3
作者信息
- 1. 东华大学材料科学与工程学院,上海
- 2. 东华大学材料科学与工程学院,上海;东华大学纤维材料改性国家重点实验室,上海
- 3. 东华大学材料科学与工程学院,上海;东华大学纤维材料改性国家重点实验室,上海;东华大学功能材料研究中心,上海
- 折叠
摘要
为提高共价有机框架(COFs)材料的结晶度,从而提高其在气体吸附领域的应用,使用2,5-二甲基对苯二甲酰肼(Th-(Me)2)与2,4,6-三(4-醛基苯基)-1,3,5-三嗪(TFPT)作为构筑单元,采用溶剂热法成功合成新型甲基功能化COF材料(COF-Th-Me).利用粉末X射线衍射、红外光谱、固体核磁共振碳谱、氮气吸附-脱附和热重分析等方法,结合理论模拟对COF-Th-Me结构性质进行研究,并对其二氧化碳吸附性能进行分析.结果表明,与无甲基功能化COF(COF-Th)相比,COF-Th-Me 的结晶度明显提高,结构表现为AA堆积结构(加权图形方差因子Rwp=2.00％,图形方差因子Rp=1.53％),具有较高的热稳定性.COF-Th-Me在273 K和0.1 MPa条件下,对二氧化碳气体的吸附量达到了 27.6 cm3/g,由此可知其在气体吸附领域具有潜在应用价值.
Abstract
In order to improve the crystallinity of covalent organic frameworks(COFs)materials and improve their application in the field of gas adsorption,2,5 dimethyl terephthalic hydrazide(Th-(Me)2)and 2,4,6-tri(4-aldehyde phenylphenyl)-1,3,5-triazine(TFPT)were used as building blocks,leading to the successful synthesis of novel methyl functionalized COF(COF-Th-Me)through the solvothermal method.Powder X-ray diffraction,fourier transform infrared spectroscopy,solid-state carbon nuclear magnetic resonance spectroscopy and nitrogen adsorption-desorption methods were employed to study its structural properties.The results show that compared with non-methyl functionalized COF(COF-Th),the crystallinity of COF-Th-Me is significantly improved,and the structure in AA stacked mode(Rwp=2.00％,Rp=1.53％)according to simulation results.The thermogravimetric analysis show that COF-Th-Me has high thermal stability.Under the conditions of 273 K and 0.1 MPa,COF-Th-Me exhibits an adsorption capacity of 27.6 cm3/g for CO2,demonstrating its potential application in the field of gas adsorption.
关键词
共价有机框架/结构模拟/溶剂热法/二氧化碳吸附Key words
covalent organic framework/structural simulation/solvothermal method/CO2 absorption引用本文复制引用
基金项目
中央高校基本科研业务费专项资金(2232020A-02)
出版年
2024
NETL
NSTL
万方数据