膜
播种
次生生长
结晶
多孔性
化学工程
材料科学
渗透
悬挂(拓扑)
甲烷
氢
铜
复合材料
化学
有机化学
冶金
园艺
航空航天工程
数学
工程类
纯数学
同伦
生物
生物化学
木质部
作者
Víctor Varela-Guerrero,Yeonshick Yoo,Michael McCarthy,Hae‐Kwon Jeong
摘要
Here we report the synthesis of continuous HKUST-1 membranes on porous supports via the secondary (i.e., seeded) growth method. A new seeding technique (“thermal seeding”) was developed to strongly anchor HKUST-1 seed crystals on porous α-alumina supports. It was found critical to have both organic ligands and copper species in the seed suspension as well as to seed the crystals at elevated temperature. The HKUST-1 seed crystals on the supports were then hydrothermally grown into continuous HKUST-1 films. The formation of cracks and fractures in the films was prevented by controlling the cooling and the drying processes after crystallization. The permeation results of HKUST-1 membranes show moderate separation of hydrogen over other small gas molecules such as carbon dioxide, nitrogen, oxygen, and methane.
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