引用本文:
CHAEMCHUEN Somboon, 周奎, 姚宸, 罗志雄, VERPOORT Francis. 碱性金属修饰金属有机骨架材料MOF-5吸附位点及其常态下分离二氧化碳/甲烷的应用[J]. 应用化学,
2015, 32(5): 552-556.
doi:
10.11944/j.issn.1000-0518.2015.05.140311
Citation: CHAEMCHUEN Somboon, ZHOU Kui, YAO Chen, LUO Zhixiong, VERPOORT Francis. Alkali-Metal Tuning of Adsorption Sites in Metal Organic Frameworks MOF-5 for Carbon Dioxide/Methane Separation at Ambient Conditions[J]. Chinese Journal of Applied Chemistry, 2015, 32(5): 552-556. doi: 10.11944/j.issn.1000-0518.2015.05.140311
Citation: CHAEMCHUEN Somboon, ZHOU Kui, YAO Chen, LUO Zhixiong, VERPOORT Francis. Alkali-Metal Tuning of Adsorption Sites in Metal Organic Frameworks MOF-5 for Carbon Dioxide/Methane Separation at Ambient Conditions[J]. Chinese Journal of Applied Chemistry, 2015, 32(5): 552-556. doi: 10.11944/j.issn.1000-0518.2015.05.140311
碱性金属修饰金属有机骨架材料MOF-5吸附位点及其常态下分离二氧化碳/甲烷的应用
摘要:
利用"一步法"合成并表征了4种碱性金属修饰的金属有机骨架材料MOF-5(记作M-MOF-5,M=Li,Na,K,Mg)。并应用理想溶液吸附理论(IAST)对样品吸附选择性进行计算比较。结果表明,碱性金属掺入可以降低MOF-5材料骨架结构的"互穿"程度,同时,在常温常压下,M-MOF-5对CO2/CH4的吸附选择性相对MOF-5(选择性为3.79)有着显著提高,尤其是Li-MOF-5(选择性为7.39)。此外,Li-MOF-5的CO2捕获能力相对MOF-5也有提高。
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关键词:
- 金属有机骨架材料MOF-5
- / 二氧化碳/甲烷选择性
- / 碱性金属
- / 骨架互穿
English
Alkali-Metal Tuning of Adsorption Sites in Metal Organic Frameworks MOF-5 for Carbon Dioxide/Methane Separation at Ambient Conditions
Abstract:
Alkali-metal modified metal organic frameworks MOF-5(denoted by M-MOF-5,M=Li,Na,K,Mg) were prepared by ‘one-step’ synthesis.The theoretical calculation(IAST,ideal adsorbed solution theory)was performed to compare the adsorption selectivity of materials.It is found that alkali-metal incorporated MOF-5 can reduce the interpenetration level of MOF-5 framework.The experiment results also show that M-MOF-5 can significantly improve the CO2/CH4 adsorption selectivity compared to MOF-5(3.79),especially Li-MOF-5(7.39) at ambient conditions.Furthermore,the CO2 capacity of Li-MOF-5 is also enhanced.
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