在多孔金属有机宿主材料中的可逆和选择性O2化学吸收
Peter D Southon1, David J Price, Pia K Nielsen
1School of Chemistry, The University of Sydney, NSW 2006, Australia.
Journal of the American Chemical Society
|June 7, 2011
概括
一种新的金属有机框架材料展示了可逆的氧气吸收和释放,即使在高温下也保持了高容量. 由于选择性吸附氧气,这种材料对高效的空气分离应用具有前景.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学 有机化学
- 超分子化学 超分子化学
背景情况:
- 金属有机框架 (MOF) 为气体储存和分离提供可调节的多孔性和功能.
- 开发具有选择性气体吸附性质的材料对于空气分离等工业应用至关重要.
研究的目的:
- 合成和描述一种基于的新型金属有机框架,用于二氧化碳 (O2) 化学吸收和空气分离.
- 研究MOF结构内的可逆氧结合和释放机制.
主要方法:
- 单晶和粉末X射线衍射用于结构分析.
- 在各种温度和压力下测量二氧化物化学吸收.
- 大气气体 (O2,N2) 的气体吸附等温.
主要成果:
- 合成的材料[{Co(III) (((2) ((bpbp) (((O(2))) (((2) bdc] ((PF(6)) ((4) (1·2O(2)) 通过一个Co(III) /Co(II) 氧化还原过程表现出可逆的O2化学吸收.
- 该材料保持结晶性和近静态度的O2吸收能力高达100°C.
- 观察到高的O2/N2选择性 (在1 atm时38的因子),表明空气分离的潜力.
结论:
- 金属有机框架显示出出色的O2吸附/脱附能力和热稳定性.
- 孔隙结构促进了客分子的迁移,并增强了固态中的O2结合亲和力.
- 这种材料是选择性O2捕获和空气分离技术的有希望的候选者.
相关概念视频
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