Ionic liquids-SBA-15 hybrid catalysts for highly efficient and solvent-free synthesis of diphenyl carbonate

Restrictive Regulation of Ionic Liquid Quaternary Ammonium Salt in SBA‐15 Pore Channel for Efficient Carbon Dioxide Conversion

“…Accordingly, the intensity of the characteristic peaks of SBA−M (SBA‐15 immobilized with ILs) has observably decreased which is consistent with the results of the N 2 adsorption‐desorption isotherms and pore size distributions. Thus, it is shown that the mesoporous channel was filled with M‐H 2 L [37] …”

“…Accordingly, the intensity of the characteristic peaks of SBAÀ M (SBA-15 immobilized with ILs) has observably decreased which is consistent with the results of the N 2 adsorption-desorption isotherms and pore size distributions. Thus, it is shown that the mesoporous channel was filled with M-H 2 L. [37] Thermogravimetric analysis (TG) was used to further confirm the loss of different metal contents and ILs. According to Figure 4b, there is no significant weight loss in SBA-15 on all scales.…”

Nanostructured silicate catalysts for environmentally benign Strecker-type reactions:status quoandquo vadis

“…Therefore, chemical bonding grafting of ionic liquids on the surface of solid supports is a beneficial way to bring together the advantageous characteristics of ionic liquids and solid properties. Brønsted ionic liquids supported on mesoporous silicas and nanoporous Na + -MMT, such as SiO 2 -[PIM]HSO 4 , 94 SiO 2 -[PIM-SO 3 H]Cl, 95 SBA-15-[PMIM]Cl, 96 SBA-15-[PPIM-SO 3 H]Br 97 and Na + -MMT-[PMIM]HSO 4 (ref. 98 ) ( Fig.…”

Polystyrene-supported imidazolium acidic ionic liquids: highly efficient catalysts for the synthesis of bisphenols

“…The commonly used catalyst supports reported include silica, mesoporous molecular sieve, alumina, MOFs, polymer resin, etc. [24][25][26][27][28][29] When these materials are applied for catalysis, the loading amount of ionic liquids and the high mass transfer through the material channel become critical. However, the chemical bonding of ionic liquids on silica, molecular sieves and oxides generally depends on the connection of cross-linking agents, which increases the complexity of the catalyst preparation.…”