<i>tert</i>‐Butyl Functionalized Ultra‐Microporous Three‐Dimensional Covalent Organic Framework for Efficient SF<sub>6</sub>/N<sub>2</sub> Separation
Abstract
AbstractEfficient capture and recovery of sulfur hexafluoride (SF6) from SF6/N2 mixtures is critical for mitigating greenhouse effects and promoting gas recycling in the electronics industry. Herein, we report a novel ultra‐microporous three‐dimensional covalent organic framework (COF), termed CPOF‐12, enriched with tert‐butyl groups. CPOF‐12 exhibits a Brunauer−Emmett−Teller (BET) surface area of 1,140 m2 g−1, a pore volume of 0.66 cm3 g−1, and a uniform pore size of 0.59 nm, which closely matches the kinetic diameter of SF6 (0.52 nm). Gas adsorption measurements reveal a high SF6 uptake of 2.20 mmol g−1 at 298 K and 1 bar, along with an exceptional SF6/N2 selectivity of 149.4, calculated using ideal adsorbed solution theory (IAST). This study highlights the effectiveness of pore surface engineering in COFs for high‐performance separation of greenhouse gases.
Article Details
Authors (7)
Yu Zhao
Chenxi Meng
Yuqing Chen
Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty Chemicals, Institute of Advanced Fluorine-Containing Materials
Wenkang Gong
Guolong Xing
Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty Chemicals, Institute of Advanced Fluorine-Containing Materials
Daqiang Yuan
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter
Teng Ben
Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty Chemicals, Institute of Advanced Fluorine-Containing Materials