Designing highly porous three-dimensional triazine-bearing covalent organic polymers as prominent adsorbents of carbon dioxide and iodine
Noorullah Baig, Suchetha Shetty, Sk Abdul Wahed, Atikur Hassan, Neeladri Das, Bassam Alameddine
Abstract
A new class of triazine-containing covalent organic porous polymers TCOP1-3 were made using a versatile one-pot [3 + 2] cyclocondensation reaction revealing remarkable robustness as proven by their thermal stability which disclosed a 10 % weight loss temperature ≥400 °C. Investigation of the intrinsic microporosity properties of TCOP1-3 using nitrogen adsorption experiments disclosed salient Brunauer–Emmett–Teller (BET) surface areas ranging from 725 to 932 m 2 g −1 with average pore volumes in the range of 0.52–0.65 cm 3 g −1 . TCOP1-3 exhibited high CO 2 uptakes attaining 120 mg g −1 at 273K and low pressure whereas iodine capture tests demonstrated significant results achieving a maximum adsorption of 4.02 g g −1 . Recycling experiments confirmed the potential for these polymers to be restored even after a multitude of concurrent iodine adsorption-desorption cycles. • Highly porous polymers were made using a [3 + 2] cyclocondensation reaction. • BET surface areas of ranging from 725 to 932 m 2 g −1 • CO 2 uptakes attaining 120 mg g −1 at 273K • Iodine capture reaching maximum adsorption of 4.02 g g −1 • Polymers can be recycled for at least seven cycles of iodine sorption.