Highly efficient metal/solvent-free chemical fixation of CO2 at atmospheric pressure conditions using functionalized porous covalent organic frameworks

N/O-rich multilayered ultramicroporous carbon for highly efficient capture and conversion of CO2 under atmospheric conditions

“…Based on previous reports and the experimental results given in this work, 10,28,30 a possible mechanism of the PGNC-catalyzed cycloaddition reaction between CO 2 and epoxides under atmospheric conditions was proposed (Scheme 2). First, the coordinated carbon with less steric hindrance in epoxide was nucleophilically attacked by the Br À in TBAB, resulting in the ring-opening of C-O bonds.…”

“…Among them, carbon capture and utilization (CCU) has been recommended as the most operationally efficient strategy for reducing CO 2 emissions and mitigating climate change. [6][7][8][9][10] Moreover, given the nontoxicity, renewability and cheap cost of CO 2 , the readily available C1 feedstock could be used to synthesize various high value-added chemicals through this way. [11][12][13][14] Depending on the nature of the different reactions and the catalysts used, multiple valuable products would be obtained such as cyclic carbonates, dimethyl carbonates, formic acid, methanol, polycarbonates, urea, urethanes, and so on.…”

“…However, it should still be noted that the critical criteria for a successful CCU implementation include careful selection of suitable substrates and precise fabrication. Numerous porous materials, such as zeolite molecular sieves, covalent organic frameworks (COFs), 10,25 porous carbon, 26 and metal-organic frameworks (MOFs), [27][28][29][30] have been developed during the last few decades. The porous carbon material adsorption and catalysis technique stands out among a range of CO 2 capture and conversion methods in terms of energy-saving, environmental-friendliness, simplicity, and high-efficiency.…”

Multifunctional Eu3+‐coordination polymer for highly selective recognition of Fe3+ and MnO4− ions in water and efficient catalytic fixation of carbon dioxide

“…[41][42][43][44][45][46][47] These chemicals have been widely applied as aprotic polar solvents, lithium batteries, and chemical intermediates for the synthesis of chemicals. [48][49][50] So far, various homogeneous (such as phosponium salts [51,52] and ionic liquids [53,54] ) and heterogeneous catalysts (such as metal oxides, [55,56] covalent organic frameworks [COFs], [57,58] and CPs [45][46][47][59][60][61][62][63][64] ) have been explored for the cycloaddition of CO 2 with epoxides. Among these, CPs with high-density coordinationunsaturated metal sites are conducive to the fixation of CO 2 , which has attracted extensive attention.…”

Amino-Functionalized Ionic-Liquid-Grafted Covalent Organic Frameworks for High-Efficiency CO2Capture and Conversion

“…Thereby, a series of [AeImBr] X % -TAPT-COFs ( X = 0, 17, 33, 50, 67, 83, 100) with different densities of Br – catalytic sites are successfully prepared. The as-synthesized [AeImBr] X % -TAPT-COFs inherit the merits of both [HO] X % -TAPT-COFs and NH 2 -ILs: (i) CO 2 -philic and N 2 -phobic groups (imine and triazine groups), imidazolium cation, and polar group (−NH 2 ) help to enhance the capture ability of CO 2 molecules and accelerate CO 2 conversion, and (ii) the presence of abundant catalytic sites (−NH 2 and Br – ) contributes to the cycloaddition rate of CO 2 with epoxide. , A series of experiments were carried out to reveal the effect of different contents of NH 2 -ILs in [AeImBr] X % -TAPT-COFs on the yield of cyclocarbonate. In addition, the stability of materials prepared via chemical grafting was investigated by a cycling test.…”