Ordered Macro/Microporous Ionic Organic Framework for Efficient Separation of Toxic Pollutants from Water

Abstract

In case of pollutant segregation, fast mass diffusion is a fundamental criterion in order to achieve improved performance. The rapid mass transport through porous materials can be achieved by availing large open pores followed by easy and complete accessibility of functional sites. Inducing macroporosity into such materials could serve as ideal solution providing access to large macropores that offer unhindered transport of analyte and full exposure to interactive sites. Moreover, the challenge to configure the ionic‐functionality with macroporosity could emerge as an unparalleled avenue toward pollutants separation. Herein, we strategized a synthetic protocol for construction of a positively charged hierarchically‐porous ordered interconnected macro‐structure of organic framework where the size and number of macropores can easily be tuned. The ordered macropores with strong electrostatic interaction synergistically exhibited ultrafast removal efficiency towards various toxic pollutants.

Super-fast iodine capture by an ionic covalent organic network (iCON) from aqueous and vapor media

“…Based upon the data obtained from kinetic and adsorption studies, the plausible mechanism of capture of iodine species is via ion-exchange mechanism in which chloride ions are rapidly exchanged by anionic iodine species such as Ior I 3 -. 71,72 Furthermore, we have investigated the ability of iCON-4 to selectively capture iodine species in presence of other anionic species as is desired for a solid adsorbent intended for application in real-time scenarios. Typically, contaminated water may contain several competing anionic species such as sulphate (SO 4 2-), bromide (Br -), nitrate (NO 3 -) and chloride (Cl -) that may retard or even hinder the efficient iodine species uptake shown by iCON-4.…”

A review of metal–organic framework (MOF) materials as an effective photocatalyst for degradation of organic pollutants

“…61 Over time, signicant progress has been made, but certain limitations need to be addressed before MOFs can be commercialized for industrial use. [62][63][64] Additionally, there have been reports of water-stable and light-responsive MOFs capable of removing organic pollutants from wastewater. 65 The wide variety of organic linkers and metal ions in MOFs allows tuning them to form secondary building units (SBUs) for target-specic pollutants using solar energy (Fig.…”