Abstract
In recent years, functionalized hyper-crosslinked polymers (HCPs) have received increasing attention due to their high Brunauer − Emmett − Teller (BET) surface area (SBET), adjustable porosity and diversified functionality. Herein, the acetamido-functionalized HCPs namely PS-PDAT-FDA(SnCl4) were synthesized by two successive Friedel − Crafts reactions and the resultant polymers offered high SBET (756 m2/g), abundant N (4.6%) and O content (9.5%), and unique hierarchical porosity. The adsorption experiments indicated that the fabricated HCPs had a good adsorption of phenol with the predicted maximum capacity (qmax) of 214.5 mg/g. Increasing the Na2SO4 concentration slightly enhanced the adsorption, about 90 min was needed for the adsorption reaching the equilibrium, and the adsorption in tap water was also excellent. The adsorption mechanism revealed the uploaded C = O functionalities of the acetamido groups made a great positive contribution to the enhanced adsorption and strong hydrogen bonding between the C = O functionalities of the polymers and the phenolic hydroxyl groups of phenol was the main driving force.
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