Abstract
The pollution of toxic organic dyes and unmetabolized antibiotics to environments was becoming increasingly serious, therefore, it was urgent to remove them. In this paper, a three-dimensional hypercrosslinked porphyrin-based porous organic polymer (TP-PPOPs) with 5,10,15,20-tetraphenylporphyrin and triptycene as monomers was designed and synthesized for the first time. By further reacting TP-PPOPs with chlorosulfonic acid, a new three-dimensional sulfonic acid functional material (TP-PPOPs-SO3H) with significantly improved electronegativity and hydrophilicity was obtained. Both reactions were mild and no expensive metal catalysts were required. Benefiting from the hypercrosslinked structure, stable three-dimensional rigid framework, abundant adsorption active sites and high specific surface area, TP-PPOPs-SO3H exhibited extremely fast adsorption rate, outstanding adsorption selectivity, extraordinary reusability and ultra-high adsorption capacity for MB and CIP, with the maximum adsorption capacities being 1283.33 mg·g−1 for MB and 485.39 mg·g−1 for CIP, respectively. The study of adsorption mechanism revealed that the ultra-high adsorption capacity of TP-PPOPs-SO3H on MB and CIP was mainly attributed to their strong electrostatic interaction and the extended π-conjugated frameworks and large specific surface area of TP-PPOPs-SO3H.
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