Covalent organic frameworks, as a subclass of crystalline and porous organic polymers, have extraordinary features such as predesignable and very high structural order, control of their synthetic conditions and the type of functional groups in their framework, which privileges the possibility of using them for various applications. In this research, which was fulfilled with the aim of synthesizing a novel N-rich covalent organic framework and eva‎luating its applications in CO2 adsorption and efficient removal of scarlet 4BS as organic dye, at first, substrates were synthesized with the ability to condense with each other to create linkages containing carbon-nitrogen double bonds in the framework, and then, their creation was confirmed by analyses. Then, using the solvothermal method, the framework was prepared and its characteristics, such as thermal stability, morphology, crystallinity, porosity, surface area, type, and amount of surface charge, etc. were examined using characterization analyses. In the application eva‎luation stage, the amount of CO2 gas adsorption by this framework at a pressure of approximately 1 bar and at a temperature of 250C was 21 mg.g-1 and in addition, this framework showed a significant capacity to remove the scarlet 4BS under the optimal condition of this process in an acidic solution with (pH=2), in the presence of 600 ppm of adsorbent and 4 mg of N-riched covalent organic framework. By examining the adsorption isotherms and kinetic models, a greater understanding of the nature and mechanism of dye removal was possible, which followed the Langmuir model, thus confirming the chemical adsorption of a single layer of this water and wastewater pollutant on the framework.

محمد ديناري

غلامحسين محمدنژاد شيرازي

سياوش كاظمي موحد , معصومه جديدي نژاد