Wan Yinji, Miao Yefan, Qiu Tianjie, Kong Dekai, Wu Yingxiao, Zhang Qiuning, Shi Jinming, Zhong Ruiqin, Zou Ruqiang
State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, No. 18 Fuxue Road, Changping District, Beijing 102249, China.
Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, School of Materials Science and Engineering, Peking University, No. 5 Yiheyuan Road, Haidian District, Beijing 100871, China.
Nanomaterials (Basel). 2021 Dec 10;11(12):3348. doi: 10.3390/nano11123348.
Amine-functionalized metal-organic frameworks (MOFs) are a promising strategy for the high-efficiency capture and separation of CO. In this work, by tuning the ratio of 1,3,5-benzenetricarboxylic acid (HBTC) to 5-aminoisophthalic acid (5-NH-HIPA), we designed and synthesized a series of amine-functionalized highly stable Ti-based MOFs (named MIP-207-NH-, in which represents 15%, 25%, 50%, 60%, and 100%). The structural analysis shows that the original framework of MIP-207 in the MIP-207-NH- ( = 15%, 25%, and 50%) MOFs remains intact when the mole ratio of ligand HBTC to 5-NH-HIPA is less than 1 to 1 in the resulting MOFs. By the introduction of amino groups, MIP-207-NH-25% demonstrates outstanding CO capture performance up to 3.96 and 2.91 mmol g, 20.7% and 43.3% higher than those of unmodified MIP-207 at 0 and 25 °C, respectively. Furthermore, the breakthrough experiment indicates that the dynamic CO adsorption capacity and CO/N separation factors of MIP-207-NH-25% are increased by about 25% and 15%, respectively. This work provides an additional strategy to construct amine-functionalized MOFs with the maintenance of the original MOF structure and high performance of CO capture and separation.
胺功能化金属有机框架材料（MOFs）是一种高效捕获和分离一氧化碳的有前景的策略。在本工作中，通过调节1,3,5-苯三甲酸（HBTC）与5-氨基间苯二甲酸（5-NH-HIPA）的比例，我们设计并合成了一系列胺功能化的高度稳定的钛基金属有机框架材料（命名为MIP-207-NH-，其中 代表15%、25%、50%、60%和100%）。结构分析表明，在MIP-207-NH-（ = 15%、25%和50%）金属有机框架材料中，当所得金属有机框架材料中配体HBTC与5-NH-HIPA的摩尔比小于1比1时，MIP-207的原始框架保持完整。通过引入氨基，MIP-207-NH-25%在0℃和25℃时表现出出色的一氧化碳捕获性能，分别高达3.96和2.91 mmol/g，比未改性的MIP-207分别高出20.7%和43.3%。此外，突破实验表明，MIP-207-NH-25%的动态一氧化碳吸附容量和一氧化碳/氮气分离因子分别提高了约25%和15%。这项工作为构建胺功能化金属有机框架材料提供了另一种策略，可保持原始金属有机框架结构并具有高性能的一氧化碳捕获和分离能力。
