The Role of Micropores and Amine Groups in Preferential CO2 Adsorptivity of Porous Zn-Coordination Polymers Comprising Mixed Ligands of Triazole and Amino Triazole

Abstract

Porous coordination polymers (PCPs) of Zn 2+ , oxalic acid and mixture ratio of 3-amino, 1,2,4triazole (Ataz) and 1,2,4-triazole (Taz) were synthesized to capture of carbon dioxide. A series of molar fraction Taz/(Taz + ATaz) prepared as 0.1;0.3;0.4;0.5;0.6;0.7 and 0.9 and also only ATaz and Taz ligand as 0 and 1 molar fraction respectively. Mixture of Taz and ATaz crystal induce new structure of 0.4, 0.5 and 0.6 molar fraction. Nitrogen adsorption of 50% mixture each ligand contribute the highest surface area as function of optimum condition to integrate pore space and amine group presence with adsorbed as 290 mgg -1 . This phenomena also shown through CO 2 adsorption amount as 135 mgg -1 , instead of 0.4, 0.6 and 0.7 molar fraction observed higher amount of CO 2 compared with only Taz ligand (X=1), indicate the integrated effects both of the ligand could generated the capture of higher amount of carbon dioxide.