Fine-tuning of the confined space in microporous metal–organic frameworks for efficient mercury removal

Abstract

We report a novel metal–organic framework showing a very efficient, selective and fast Hg2+removal.

Regenerable and stable sp2 carbon-conjugated covalent organic frameworks for selective detection and extraction of uranium

“…Covalent organic frameworks (COFs) are a class of porous crystalline polymers with significant advantages for application in catalysis [14][15][16][17][18] , gas storage [19][20][21][22] , and metal ion extraction [23][24][25][26][27] owing to excellent chemical and thermal stability, flexible topological connectivity, and tunable functionality [28][29][30] . COFs with tunable porosity and large specific surface area might be ideal for extracting radionuclides such as UO 2 2+ .…”

Recent Advances in Affinity MOF-Based Sorbents with Sample Preparation Purposes

“…The most common technique to incorporate amino acids in bio-material is by adding these biomolecules to the precursor mixture [ 22 ]. The resulting bio-MOFs have been applied in several fields, such as chiral recognition [ 23 , 24 ], the recovery of heavy metals [ 25 , 26 ], or the enrichment of peptides [ 27 , 28 ]. Table 1 shows an overview of the most important and recent applications using amino acids as ligands to prepare bio-MOF supports as SPE materials.…”

“…In particular, Mon and co-workers [ 26 ] have reported the design and synthesis of several three-dimensional frameworks using different amino acids such as L-serine, L-methionine, and L-threonine. The best sorbent for mercury removal was that built with L-methionine, with the formula {Cu 4 (II)[(S,S)-methox] 2 }·5H 2 O, where methox is bis[(S)-methionine]oxalyl diamide.…”

An l-cystine/l-cysteine impregnated nanofiltration membrane with the superior performance of an anchoring heavy metal in wastewater

“…[28][29][30][31][32][33][34][35] In this context, numerous organic sulfur compounds including thiols, thioethers, disuldes, and mercaptans have been adopted to prepare new materials with high removal efficiency of heavy metal ions such as Hg(II), Ag(I), Pb(II), and Cd(II). 36,37 For example, some thiol/thiofunctionalized covalent organic frameworks (COFs), metalorganic frameworks (MOFs), carbon nanotubes, mesoporous silicas, zeolites as well as porous carbons have been developed [38][39][40][41][42][43][44][45][46] and exhibit high efficiency, selectivity, and easy recyclable adsorption capability towards toxic heavy metal ions. Nevertheless, several drawbacks of these adsorbents are needed to be improved, such as time consumption, production of large amounts of toxic sludge and liquid waste as well as high operational and capital costs.…”