Tailoring new covalent organic framework for highly efficient iodine capture
AssigneeUnited Arab Emirates University
InventorsShaikha Alneyadi, Mohammed Taleb Khamis Alhassani, Ali Saeed Saif Aleissaee, Abdullah Ayman Khalaf, Abdulrahman Abdullah Alhaj Alteneiji, Sultan Ali Jama, Yaser Yushi Yaser Alyaarbi
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Abstract
The phosphazene covalent organic framework (COF) is a material with high efficiency to improve the removal of iodine from nuclear waste. The COF can be obtained by a solvothermal reaction of hexa (4-formyl-phenoxy)cyclotriphosphazene and 1,3,6,8-tetra(aminophenyl)pyrene. The resulting three-dimensional phosphazene COF has iodine uptakes as high as 9.4 g g−1 due to its 3D framework with higher specific surface areas and interconnected channels.
Claims12
A method for making a phosphazene covalent organic framework (MA-COF) comprising:
- obtaining a hexa(4-formyl-phenoxy)cyclotriphosphazene having the formula:
- obtaining a 1,3,6,8-tetra(aminophenyl)pyrene having the formula:
- placing the hexa(4-formyl-phenoxy)cyclotriphosphazene and the 1,3,6,8-tetra(aminophenyl)pyrene in separate vessels, then adding a solvent to each respective vessel and sonicating each respective vessel to obtain a hexa(4-formyl-phenoxy)cyclotriphosphazene homogenous dispersion and a 1,3,6,8-tetra(aminophenyl)pyrene homogenous dispersion;
- adding the hexa(4-formyl-phenoxy)cyclotriphosphazene homogenous dispersion to the vessel containing the 1,3,6,8-tetra(aminophenyl)pyrene homogenous dispersion to obtain a suspension;
- adding acetic acid to the suspension and leaving the resulting mixture in an autoclave undisturbed for at least about 7 days at a temperature of about 110° C. to about 130° C. to obtain a solid;
- collecting the solid by filtration and drying the solid to obtain the phosphazene covalent organic framework (MA-COF) having the formula:
Dependencies are inferred from the claim text.