Construction of 2D porphyrin-based covalent organic framework as adsorbent for organic dyes removal and carbon dioxide adsorption.

A porphyrin-based two-dimensional covalent organic framework (TPE-Por-COF) with high stability was synthesized, and the adsorption performance of TPE-Por-COF on organic dyes was studied. The TPE-Por-COF was characterized by X-ray powder diffraction, infrared spectroscopy, solid-state nuclear magnetic resonance, thermogravimetry and N 2 adsorption isotherms. TPE-Por-COF has adsorption effect on five dyes: malachite green (MG), methyl violet (MV) and rhodamine B (RhB), coomassie brilliant blue (CBB) and brilliant green (BG). Among them, TPE-Por-COF has the most obvious adsorption effect on malachite green, and the adsorption capacity is as high as 1428.57 ​mg ​g-1. In addition, the CO 2 adsorption capacity of TPE-Por-COF is 187 ​mg ​g-1 at 50 ​bar and 323 ​K. A new COF (TPE-Por-COF) based on porphyrin and tetraphenylethylene derivatives was synthesized, which can be used as effective dye adsorption and gas storage. TPE-Por-COF has an adsorption effect on five dyes: malachite green (MG), methyl violet (MV) and rhodamine B (RhB); coomassie brilliant blue (CBB) and brilliant green (BG). Among them, TPE-Por-COF has the most obvious adsorption effect on malachite green, and the adsorption capacity is as high as 1428.57 ​mg ​g-1, and the adsorption rate is 15.9 ​mg ​g-1 min-1 in the first minute. For each dye, the dye adsorption effect of TPE-Por-COF did not decrease significantly within 5 cycles. In addition, the adsorption capacity of TPE-Por-COF for CO 2 was 187 ​mg ​g-1 at 50 ​bar and 323 ​K. [Display omitted] • A new covalent organic framework adsorbent based on porphyrin and tetraphenylethylene derivatives was synthesized. • The adsorbent has excellent adsorption performance for MG, MV, RhB, CBB, and BG dyes. • The adsorption kinetics and isotherms were studied in detail. • The adsorbent has a good carbon dioxide adsorption capacity. [ABSTRACT FROM AUTHOR]