Trap Inlaid Cationic Hybrid Composite Material for Efficient Segregation of Toxic Chemicals from Water

Abstract

Metal-based oxoanions are potentially toxic pollutants that can cause serious water pollution. Therefore, the segregation of such species has recently received significant research attention. Even though several adsorbents have been employed for effective management of chemicals, their limited microporous nature along with non-monolithic applicability has thwarted their large-scale real-time application. Herein, we developed a unique anion exchangeable hybrid composite aerogel material (IPcomp-6), integrating a stable cationic metal-organic polyhedron with a hierarchically porous metal-organic gel. The composite scavenger demonstrated a highly selective and very fast segregation efficiency for various hazardous oxoanions such as, HAsO 4 2À , SeO 4 2À , ReO 4 À , CrO 4 2À , MnO 4 À , in water, in the presence of 100-fold excess of other coexisting anions. The material was able to selectively eliminate trace HAsO 4 2À even at low concentration to well below the As V limit in drinking water defined by WHO.

Strategies for the Construction of Functional Materials Utilizing Presynthesized Metal‐Organic Cages (MOCs)

“…The selective adsorption is high even in the mixed solution with excessive (∼1000‐fold) interfering anions. Later, they incorporated MOC‐28 into metal‐organic gel (MOG) via the ‘bottle‐around ship” encapsulation strategy [79] . As shown in Figure 21b, a MOC‐28 solution in mixed DMF and water solvents and a DMF solution of Al(NO 3 ) 3 ⋅ 9H 2 O and trimisic acid were mixed and heated to form the MOCs@MOG hybrid composite ( 58 ).Then, the MOCs@MOG was carefully dried under a supercritical CO 2 drying procedure to obtain the hybrid composite metal‐organic aerogel (MOA) material, MOCs@MOA ( 59 ).…”

“…Later, they incorporated MOC-28 into metal-organic gel (MOG) via the 'bottle-around ship" encapsulation strategy. [79] As shown in Figure 21b, a MOC-28 solution in mixed DMF and water solvents and a DMF solution of Al(NO 3 ) 3 • 9H 2 O and trimisic acid were mixed and heated to form the MOCs@MOG hybrid composite (58).Then, the MOCs@MOG was carefully dried under a supercritical CO 2 drying procedure to obtain the hybrid composite metal-organic aerogel (MOA) material, MOCs@MOA (59). The interconnected large hierarchical porous MOA matrix and the well-embedded cationic MOC-28 make 59 exhibited an excellent uptake performance towards various oxoanions in water.…”

Triptycene-based and imine linked porous uniform microspheres for efficient and reversible scavenging of iodine from various media: a systematic study

“…21 This method (physisorption) is gaining importance since it has higher capture efficiency. 22 Further, iodine removal by physisorption is eco-friendly in nature, cost-effective and involves a simplistic method of operation. 23 In this context, traditional porous materials such as activated carbons, zeolites, and advanced porous materials such as metal–organic frameworks (MOFs) have been explored as adsorbents for iodine capture and storage.…”

Rapid and Efficient Removal of Diverse Anionic Water Contaminants Using a Guanidium-Based Ionic Covalent Organic Network (iCON)

“…In this regard, numerous water treatment methods (such as coagulation, photodegradation, adsorption, precipitation, oxidation, ion exchange, and others) are employed to recycle polluted water. , Among these, the ion-exchange-based adsorption technique is highly selective for the sequestration of these targeted pollutants. − Ion-exchange-driven adsorption is favored due to its simple method of operation and the absence of any unwanted or toxic byproducts. , Materials such as metal–organic frameworks (MOFs), ion-exchange resins, and layered double hydroxides (LDHs) have been explored for the removal of contaminants from water, but these adsorbents suffer from certain drawbacks . MOFs exhibit good performance and selectivity but are unstable under harsh conditions .…”