Synthesis of phenothiazine-based porous organic polymer and its application to iodine adsorption

At present, porous organic polymer materials (POPs) have become a popular topic in the research of iodine adsorption materials. Herein, we report an electron-rich porous organic polymer (PTZ-TPC-MA), obtained by Schiff base polycondensation reaction between melamine(MA) and aldehyde monomer with high yield and simplicity. It structures was characterized through FT-IR, 13C CP/MAS NMR and other material analysis measurements. The PTZ-TPC-MA material, being abundant in N and S heteroatoms, the adsorption capacity for iodine vapor, reaching up to 198.1 wt%,and it demonstrates removal rate of 79.8% for iodine from hexane solution. In addition, the recyclability tests have also confirmed its excellent reusability. The material showed better iodine capture capacity for gaseous iodine and iodine in solution. Thus PTZ-TPC-MA material thus emerges as an optimal absorber for iodine capture, offering an effective strategy to solve environmental problems. [Display omitted] •A novel porous organic polymer (PTZ-TPC-MA) was synthesized by catalyst-free Schiff.•Base polymerization reaction.•PTZ-TPC-MA for iodine vapor reached up to198.1 wt% and the removal rate of iodine in n-hexane solution was up to 79.8%.•Good reusability, low-cost, catalyst-free synthesis method to make PTZ-TPC-MA as an effective material for the removal of iodine.