Ionic liquids tailored and confined by one-step assembly with mesoporous silica for boosting the catalytic conversion of CO₂ into cyclic carbonates

Abstract

By one-step assembly with mesoporous silica, different amounts of EmimBr were dispersed and confined for boosting CO2 conversion into cyclic carbonates.

Combination of binary active sites into heterogeneous porous polymer catalysts for efficient transformation of CO2 under mild conditions

“…A number of homogeneous [14][15][16][17][18][19][20] and heterogeneous [21][22][23][24][25][26][27][28][29][30][31] catalysts have been developed for the cycloaddition of CO2 with epoxides. Among them, binary catalytic systems, composed of metal complexes as the catalyst and ammonium salts as the co-catalyst, were found to greatly promote the transformation of CO2 under ambient conditions by the synergy of the Lewis-acidic active sites and Lewis-basic nucleophilic centers [32].…”

Highly Porous Metalloporphyrin Covalent Ionic Frameworks with Well‐Defined Cooperative Functional Groups as Excellent Catalysts for CO2 Cycloaddition

“…The Zn 2p XPS spectra of Zn‐CIF1‐C 2 H 5 , Zn‐CIF2‐C 2 H 5 , and Zn‐CIF2‐C 2 H 4 are shown in Figure c. In all three cases, two peaks were observed: the Zn 2p 1/2 peak (at 1044.7 and 1046.7 eV) and the Zn 2p 3/2 peak (at 1021.6 and 1023.5 eV). These peaks confirmed the presence of Zn . In the case of Co‐CIF1‐C 2 H 5 (Figure S3c of the Supporting Information), four peaks were observed in the Co 2p XPS spectrum, which suggested that cobalt ions exist in a mixed‐valent state in Co‐CIF1‐C 2 H 5 …”

Homogeneous and Heterogeneous Ionic Liquid System: Promising “Ideal Catalysts” for the Fixation of CO2 into Cyclic Carbonates

“…So, some new physical preparation methods of SILs such as "ship-in-bottle" method [111][112][113] were exploited to improve their stability. Zhang et al [100] physically confined [EMIm]Br in mesoporous silica (mSiO 2 ) by novel one step assembly method. As shown in Figure 10A, the IL was added as template instead of traditional expensive surfactants (such as P123) during the crystallization process of silicon source.…”