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以5-氯间苯二甲酸和4,4'-联吡啶为混合配体，分别与硝酸钴和硝酸镍反应，制备了2种微孔吸附材料(分别记为材料1和材料2)。利用XRD、XPS、TG、FTIR、气体吸附等技术对其进行表征分析。XRD、FTIR和TG结果显示，材料1具有出色的潮湿稳定性和热稳定性。孔径分析表明，2种材料均为微孔材料，且最可几孔径均为0.35 nm。吸附性能结果表明，材料1对CO2的吸附能力显著高于C_2H2、CH4、CO和N2。材料1具有的微小孔道以及功能化基团(—Cl和吡啶氢)，使其对动力学直径较小的CO2(0.33 nm)表现出良好的吸附亲和力，在室温、100 kPa条件下，其对CO2/N2、CO2/CH4、CO2/CO、CO2/C_2H2的吸附选择性分别为18865、141.94、27.17和1.77。材料1对CO2具有中等的吸附热，活化、再生容易，稳定性及重复使用性能优异，是一种具有良好应用前景的CO2选择性吸附材料。
Abstract：Two microporous adsorbents were prepared by the reaction of mixed ligands(5-chloroisophthalic acid and 4,4'-bipyridine) with cobalt nitrate(or nickel nitrate). The materials were characterized by XRD, XPS, TG, FTIR and gas adsorption. The material 1 has excellent moisture stability and thermal stability according to the XRD, FTIR, and TG results. The analysis of pore size showed that both material 1 and material 2 are microporous materials with the most probable pore size of 0.35 nm. The adsorption performance showed that the adsorption capacity of material 1 for CO2 was significantly higher than that of C_2H2, CH4, CO and N2. material 1 has a small pore and functional groups(—Cl and pyridine-H), which makes it show a good adsorption affinity for CO2 with smaller kinetic diameter(0.33 nm). At room temperature and 100 kPa, the CO2 adsorption selectivity of CO2/N2, CO2/CH4, CO2/CO and CO2/C_2H2 were 18865, 141.94, 27.17 and 1.77, respectively. The material 1 has moderate adsorption heat for carbon dioxide, easy activation and regeneration, excellent stability and reusability, so it is a good selective adsorbent for carbon dioxide.
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基本信息:
DOI：10.16026/j.cnki.iea.2025050399
中图分类号:X701;TQ424
引用信息:
[1]闫鹏,陈美倩,陈志胜,等.氯功能化微孔二氧化碳吸附材料的分离性能研究[J].离子交换与吸附,2025,41(05):399-407.DOI:10.16026/j.cnki.iea.2025050399.
基金信息:
广东省大学生创新创业训练项目(项目号S202310580067)