Fine-Tuning of Nano-Traps in a Stable Metal-Organic Framework for Highly Efficient Removal of Propyne from Propylene
Hui-Min Wen, Libo Li, Rui-Biao Lin, Bin Li, Bin Hu, Wei Zhou, Jun Hu, Banglin Chen
Despite tremendous effects, precise control in the synthesis of porous materials with ideal nanocages for desired gas separation applications still remains a challenge. Microporous metal-organic frameworks (MOFs) have provided the rich chemistry to enable us precise control and design of structures, pore cavities, and functionalities at the molecular level. Here, we propose and design in microporous MOF (termed as ZJUT-1, ZJUT = Zhejiang University of Technology) with a fine-tuned nanocate, exhibiting the desired size, shape, and functionalities that are suitable for trapping a single propyne (C3H4) molecule. Adsorption and computational studies indicate that such optimized nanocages can not only reduce the uptake of propylene (C3H6), but also strengthen the C3H4-host interactions through multiple hydrogen-bonding between SiF62-/-NH2 and C3H4 molecule. This material thus shows remarkable different C3H4% and Cd3^H6 adsorption capacities, with the largest uptake ratio of 3.06 at 1 bar and 298 K, affording a very high selectivity (up to 70) for C3H4/C3H6 (1/99) separation. The actual breakthrough experiments demonstrate the ZJUT-1 can efficiently remove trace amount of C3H4 from the important raw C3H4/C3H6 mixtures under ambient conditions with 0.19 mmol g-1 C3H4 uptake capacity to produce 99.9995% pure C3H6.
, Li, L.
, Lin, R.
, Li, B.
, Hu, B.
, Zhou, W.
, Hu, J.
and Chen, B.
Fine-Tuning of Nano-Traps in a Stable Metal-Organic Framework for Highly Efficient Removal of Propyne from Propylene, Journal of Materials Chemistry A, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=925497
(Accessed December 9, 2023)