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A record ammonia adsorption by calcium chloride confined in covalent organic frameworks.
- Source :
- Chemical Communications; 1/25/2022, Vol. 58 Issue 5, p1151-1154, 4p
- Publication Year :
- 2022
-
Abstract
- Ammonia is a vital chemical raw material, but it is also a highly toxic environmenal pollutant. However, its highly efficient uptake and reversible release is a challenge. Herein, we have designed and synthesized a series of hybrid materials for efficient NH<subscript>3</subscript> capture by confining calcium chloride (CaCl<subscript>2</subscript>) in a porous covalent organic framework (COF). A high capture capacity of 26.5 mmol g<superscript>−1</superscript> is obtained at 25 °C and 1 bar, which is the highest value among existing porous materials, and NH<subscript>3</subscript> can be easily desorbed at 80 °C under vacuum for 2 h. Particularly, the hybrid COF is highly efficient for the absorption of low NH<subscript>3</subscript> content. Such excellent performance is ascribed to the highly dispersion of CaCl<subscript>2</subscript> in the pores of the COF, and coordinating interaction of NH<subscript>3</subscript> to Ca<superscript>2+</superscript> together with hydrogen bond interaction between NH<subscript>3</subscript> and Cl<superscript>−</superscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13597345
- Volume :
- 58
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Chemical Communications
- Publication Type :
- Academic Journal
- Accession number :
- 154889553
- Full Text :
- https://doi.org/10.1039/d1cc06308a