Emerging Porous Materials and Their Composites for NH3 Gas Removal

• Published in: Advanced science Vol. 7; no. 24
• Main Authors: Kang, Dong Won, Ju, Susan Eungyung, Kim, Dae Won, Kang, Minjung, Kim, Hyojin, Hong, Chang Seop
• Format: Journal Article
• Language: English
• Published: Hoboken John Wiley and Sons Inc 01.12.2020
• Subjects: composite materials; covalent organic frameworks; metal–organic frameworks; NH3 adsorbents; porous organic polymers; Review; Reviews
• ISSN: 2198-3844; 2198-3844
• DOI: 10.1002/advs.202002142

NH3, essential for producing artificial fertilizers and several military and commercial products, is being produced at a large scale to satisfy increasing demands. The inevitable leakage of NH3 during its utilization, even in trace concentrations, poses significant environmental and health risks because of its highly toxic and reactive nature. Although numerous techniques have been developed for the removal of atmospheric NH3, conventional NH3 abatement systems possess the disadvantages of high maintenance cost, low selectivity, and emission of secondary wastes. In this context, highly tunable porous materials such as metal–organic frameworks, covalent organic frameworks, hydrogen organic frameworks, porous organic polymers, and their composite materials have emerged as next‐generation NH3 adsorbents. Herein, recent progress in the development of porous NH3 adsorbents is summarized; furthermore, factors affecting NH3 capture are analyzed to provide a reasonable strategy for the design and synthesis of promising materials for NH3 abatement. This review affords a comprehensive overview of porous materials and their composites to capture NH3 gas.