Engineered Removal of Trace NH3 by Porous Organic Polymers Modified via Sequential Post‐Sulfonation and Post‐Alkylation

• DOI: 10.1002/adsu.202000161
• Publication Date: 2020-10-07T08:49:21Z
• Authors: Dong Won Kang; Minjung Kang; Dae Won Kim; Hyojin Kim; Yong Hoon Lee; Hongryeol Yun; Jong Hyeak Choe; Chang Seop Hong
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract Although NH 3 is damaging to human health and the environment, a smart synthetic route toward adsorbents with controllable adsorption desorption properties at ultralow concentrations remains unexplored. Herein, double postsynthetically modified porous organic polymers, obtained via post‐sulfonation post‐alkylation, are reported. The sulfonated adsorbent, 1S , exhibits record‐high capacity (4.03 mmol g −1 ) ≈500 ppm. Notably, polymer can capture even ppb concentration level. Hydrophobization of materials alkyl chains affords cost‐effective scalable ( 1SC x 1ESC ), which possess high contact angle (≈120°) water, thus resulting in rapid kinetics exceptional recyclability under dry humid conditions room temperature. This first demonstration this design strategy for control among adsorbents.