Microporous organic hydroxyl-functionalized polybenzotriazole for encouraging CO 2 capture and separation.

We report a mild, hydroxyl functionalized and thermal stable benzotriazole-based aerogel (HO-PBTA), which is inspired by phenolic resin chemistry. Taking advantage of the synergistic adsorption interactions between hydroxy-benzotriazole and CO 2 , and the phobic effect between benzotriazole and nitrogen (N 2 ), the CO 2 uptake capacity of the HO-PBTA reaches an encouraging level (6.41 mmol g -1 at 1.0 bar and 273 K) with high selectivity (CO 2 /N 2 = 76 at 273 K).