Molecularly Imprinted Porous Aromatic Frameworks and Their Composite Components for Selective Extraction of Uranium Ions

Abstract

Selective extraction of uranium from water has attracted worldwide attention because the largest source of uranium is seawater with various interference ions (Na , K , Mg , Ca , etc.). However, traditional adsorbents encapsulate most of their functional sites in their dense structure, leading to problems with low selectivity and adsorption capacities. In this work, the tailor-made binding sites are first decorated into porous skeletons, and a series of molecularly imprinted porous aromatic frameworks are prepared for uranium extraction. Because the porous architecture provides numerous accessible sites, the resultant material has a fourfold increased ion capacity compared with traditional molecularly imprinted polymers and presents the highest selectivity among all reported uranium adsorbents. Moreover, the porous framework can be dispersed into commercial polymers to form composite components for the practical extraction of uranium ions from simulated seawater.

Significantly Enhanced Uranium Extraction from Seawater with Mass Produced Fully Amidoximated Nanofiber Adsorbent

“…In order for nuclear power to be a sustainable energy generation in the future, economically viable sources of uranium beyond terrestrial ores must be developed. In the last decades, researchers worldwide have tried various methods to recover uranium from seawater and aqueous solution, such as coprecipitation, [6] ion-exchange, [7] adsorption via porous organic polymers, [8,9] and organic-inorganic hybrid adsorbents. [5] All that is required is the ability to capture this element from seawater in cost-and energy-efficient ways.…”

Porous Cationic Covalent Triazine‐Based Frameworks as Platforms for Efficient CO2 and Iodine Capture

“…Porous organic polymers (POPs) have emerged as an advanced class of porous materials with overall good stabilities and the ability to impart desirable functionalities for task‐specific applications . Based on their structural skeletons and polymerization methodologies, POPs can be generally divided into the following categories of benzimidazole‐linked polymers, polymers of intrinsic microporosity, hyper‐cross‐linked polymers, porous aromatic frameworks (PAFs), covalent organic frameworks (COFs), conjugated microporous polymers, and CTFs . The pioneering work of Kuhn, Antonietti, and Thomas et al .…”

“…The influenceo fc ounterion species and contents on the porosities, CO 2 adsorptions, and I 2 capture capacities of the CTFs hasb een investigated.Porous organic polymers (POPs)h ave emerged as an advanced class of porous materials with overall good stabilities and the ability to impart desirable functionalities for task-specific applications. [1] Based on their structural skeletons and polymerization methodologies, POPs can be generally divided into the followingc ategories of benzimidazole-linked polymers, [2] polymers of intrinsic microporosity, [3] hyper-cross-linked polymers, [4] porousa romatic frameworks (PAFs), [5] covalent organicf rameworks (COFs), [6] conjugated microporous polymers, [7] and CTFs. [8] The pioneering worko fK uhn,A ntonietti, and Thomas et al [9] developed CTFs as new molecular platforms for the design of promisingP OPs; CTFs have since found many applications in gas storage, catalysis, optoelectronic devices, and energy storage.…”

Light Hydrocarbon Separations Using Porous Organic Framework Materials

“…POFs with unique structures have been synthesized through diversep olymerization reactions and buildingu nits, thus affording ordered POF materials, such as covalent organic frameworks (COFs), [21][22][23][24][25][26][27][28][29][30][31] and porouso rganic cages (POCs), [32][33] as well as amorphous POF materials including conjugated microporousp olymers (CMPs), [34][35][36][37][38][39] hyper-cross-linked polymers (HCPs), [40,41] covalent triazine frameworks (CTFs), [42][43][44][45][46][47][48][49] polymers of intrinsic microporosity (PIMs), [50][51][52] and porous aromatic frameworks (PAFs). [53][54][55][56][57][58][59] These POF materials have shown great potentiali ng as storage, catalysis, contaminant removal, energy storage and conversion, molecular separation, and other applications. [4,19,20,[60][61][62]…”