Synthesis of micro–mesoporous CPO-27-Mg@KIT-6 composites and their test in CO₂ adsorption

Abstract

Novel composites were synthesised through a fusion between CPO-27-Mg framework and mesoporous silica KIT-6 and tested in the CO2 adsorption.

Novel and high efficient cycloaddition of CO2 with epoxides to cyclic carbonates over reusable mesoporous KIT-6 supported imidazolium lactate catalyst

“…The EDX images of the supported ILs are exhibited in Figure 3, in which the corresponding elemental signals were distributed homogeneously and consistently, indicating the successful formation of the supported ILs species as well. Similar results are obtained by UV-Vis characterization (Figure 4), the intensity of diffraction peak at around 223 nm is attributed to Si-O species of KIT-6 [48][49][50]. Obviously, after immobilization of ionic liquids, no significant peaks attributed to the ionic liquids particles are found in the UV-Vis patterns, which may be owing to the well-dispersed ionic liquids particles encapsulated in mesoporous channels of the KIT-6 support.…”

“…After the immobilization of ionic liquid on the KIT-6 support, the typical aggregated small spherical particles can be seen in the beta zeolite, and the particles which are aggregated into big block constitute the Beta seed. The SEM images of KIT-6 and KIT-6 supported ionic liquids indicated that both of them have irregular particle morphologies, which are almost identical to the literature [48][49][50]. The EDX images of the supported ILs are exhibited in Figure 3, in which the corresponding elemental signals were distributed homogeneously and consistently, indicating the successful formation of the supported ILs species as well.…”

“…XRD patterns of all samples are showed in Figure 1. Compared to the XRD pattern of pure KIT-6, the spectra of pure KIT-6 and supported ILs are almost the same, only one broad peak appears at about 2θ = 23.4°, which is the characteristic beta zeolite structure of KIT-6 [48][49][50]. No typical peaks corresponding to ionic liquids were observed, suggested that the ionic liquid species were well-dispersed on the parent support framework.…”

“…KIT-6 was synthesized as described in literatures [48,49]. The supported ILs were synthesized according to literatures (Scheme 2) [43][44][45][46].…”

“…Among these solid supports, mesoporous silica materials offer significant advantages of large surface area, highly ordered structure, thermal and chemical stabilities. These materials can be used as a platform for the loading and dispersion of ILs active components, thereby increasing their catalytic activities and have been widely utilized as supports in the case of heterogeneous catalysis [47][48][49][50]. In this work, we wish to report the design and synthesis of a type of mesoporous KIT-6 supported imidazolium hydrogen carbonate functionalized ionic liquids.…”