Base-Tailored Hierarchical MgO Microspheres as Efficient Catalysts for CO₂ Fixation into Oxazolidinone at Atmospheric Pressure

Abstract

Wide-range implementations are ongoing to utilize recombinant CO 2 for value-added chemical synthesis via various catalytic approaches. Among others, thermal catalysis is a highly compelling and decisive approach to depleting CO 2 in the atmosphere. This study describes a solvent-and cocatalyst-free CO 2 fixation reaction employed by efficient hierarchical magnesium oxide microspheres. A straightforward precipitation process assisted the synthesis of base MgO materials using different precipitating agents. Successfully designed material inherent properties were investigated by TGA, XRD, FE-SEM, N 2 sorption, NH 2 /CO 2 -TPD, TEM/HR-TEM, and XPS analyses. The SC-MgO material that showed essential features was tested as a promising catalyst for the oxazolidinone reaction. Interestingly, the SC-MgO catalyst attained outstanding catalytic activity with 100% conversion of aniline and 97% yield and selectivity of the oxazolidinone product under atmospheric pressure. To comprehend the catalytic activity of the SC-MgO catalyst, various reaction parameters such as the effect of catalyst dosage, time, temperature, and solvents were investigated in detail. Additionally, the SC-MgO catalyst showed excellent catalytic activity toward the desired substituted oxazolidinone derivatives under optimized reaction conditions. The SC-MgO significant catalytic activity was completely reliant on inherent properties such as microsphere morphology, high specific surface area, and Lewis acidic and Lewis basic sites. The tentative oxazolidinone reaction mechanism was evidently proposed with the help of characterization and experimental results. Remarkably, the SC-MgO catalyst showed excellent recyclability with a stable catalytic activity performance along with structural and physicochemical properties for up to 10 consecutive cycles. We successfully demonstrated the highly feasible CO 2 fixation process using recyclable MgO catalyst for the oxazolidinone synthesis.

Fabrication of ZnO/CuBr1-x I x microstructural transparent solar cells with buffer layer

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Efficient Selective Catalytic Fixation of CO2 into Epoxide to Form Cyclic Carbonates Using Sodium Aluminate Engineered Gamma Alumina Catalyst

“…4,5 However, the CCU processes are one of the more promising routes to reduce CO 2 concentration in the atmosphere than the CCS methods. 6 This has encouraged the researchers to work on the utilization of CO 2 as a C1 source for the production of value-added products. However, since the CO 2 is linear, thermodynamically, and kinetically stable molecule; the activation of CO 2 requires high energy inputs.…”

Hollow CeO2 Nanospheres as Catalyst for the Conversion of Aromatic Diamines to Benzimidazoles

“…17,18 Heterocyclic compounds are used as solvents and reagents and are broadly applicable in pharmaceuticals, agrochemicals, drug design, and Li-ion batteries, and so on. 19 Thus, the design of novel thermocatalysis for the benzimidazole synthesis via the fixing of CO 2 has great catalytic efficiency at the industrial level. Previously, only a few efficient homogeneous and heterogeneous catalysts were reported for the benzimidazole synthesis.…”

“…Among greenhouse gases, CO 2 has been identified as the primary culprit in the environment. Hence, designing innovative tactics to lessen anthropogenic CO 2 concentration through the synthesis of value-added chemicals is an impressive task in the research field. , Earlier, various value-added chemicals, namely, methanol, formic acid, hydrocarbons, and heterocyclic compounds, were synthesized using CO 2 as the C1 source. , Heterocyclic compounds are used as solvents and reagents and are broadly applicable in pharmaceuticals, agrochemicals, drug design, and Li-ion batteries, and so on . Thus, the design of novel thermocatalysis for the benzimidazole synthesis via the fixing of CO 2 has great catalytic efficiency at the industrial level.…”