A nanosized metal-organic framework confined inside a functionalized mesoporous polymer: an efficient CO2 adsorbent with metal defects

被引:18
作者
Jiao, Chengli [1 ,2 ]
Majeed, Zeeshan [1 ]
Wang, Guang-Hui [1 ]
Jiang, Heqing [1 ,2 ]
机构
[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao Key Lab Funct Membrane Mat & Membrane Tec, 189 Songling Rd, Qingdao 266101, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, 457 Zhongshan Rd, Dalian 116023, Peoples R China
基金
中国国家自然科学基金;
关键词
CARBON-DIOXIDE; NITROGEN; FACILE; NANOPARTICLES; COMPOSITES; ADSORPTION; RESISTANCE; MECHANISM; MEMBRANES; ALUMINUM;
D O I
10.1039/c8ta05323e
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Hybrids with a nanosized metal-organic framework (MOF) confined within a mesoporous structure have attracted increasing attention owing to their enhanced mass transfer and novel applications. However, effective control of MOF crystal growth within pores and further understanding of the structure-property relationship are challenging. Herein, we report the confinement of a nanosized metal-organic framework CAU-1 into a functionalized mesoporous polymer via a combined impregnation and solvent vapor growth process. Carbonyl and hydroxyl groups over the wall of the mesoporous polymer well boost the nucleation and growth of CAU-1, leading to the formation of a nanosized MOF inside the mesoporous polymer. In contrast to bulk CAU-1, the nanosized CAU-1 within the hybrid exhibits significantly enhanced CO2 adsorption capacity at low pressure. As confirmed using the Al-27 MAS NMR characterization technique, the confined nanosized CAU-1 is rich in aluminium defects. The improved CO2 adsorption properties probably result from the favorable diffusion kinetics and the presence of metal defects as active binding sites.
引用
收藏
页码:17220 / 17226
页数:7
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