Porous Organic Polymers (POPs) have attracted increasing attention in water treatment because of their high surface areas, good porosities, high stability and diversity structure. Here, we chose a triptycene-based porous polymer to ensure high porosity and introduced crown ether into the network to enhance the affinity for the organic dye molecules. Novel porous organic copolymers containing triptycene and crown-ether-15 (POP-TCE-15) were obtained by a simple Friedel–Crafts reaction and were highly effective in removing organic dyes from aqueous solution. POP-TCE-15 exhibited the best performance for methylene blue dye, with a maximum adsorption capacity of 787mg g-1, surpassing the performance of most reported solid adsorbents. In addition, we investigated the adsorption performance of POP-TCE-15 for Rh B and MO dyes. Interestingly, anionic dye MO displayed a lower adsorption capacity (64 mg g-1) compared to cationic MEB. The mechanism of adsorption of the dyes on POP-TCE-15 was tentatively illustrated by theoretical quantum calculation. The high adsorption capacity is due to the electrostatic interaction between the positively charged cationic MEB and the lone pair of electrons on the O atoms of crown-ether-15. Rational design and synthesis POP adsorbents with favorable functional group holds a potential to apply them in water treatment.

Facile preparation of crown ether functionalized porous organic polymer for water treatment

256th National Meeting (2018)

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