Conversion of CO₂ to Heterocyclohexenol Carboxylic Acids through a Metal–Organic Framework Sponge

Abstract

The conversion of CO2 into high value-added chemical products is the focus of current scientific research. We make use of the specific porous structure of nanosized metal–organic frameworks (MOFs) loading the highly active yet metastable nano Cu2O to catalyze the conversion of CO2 into a series of high value-added bioactive pyridone/pyrone-3-carboxylic acid products via heterocyclic 4-hydroxy-2-pyridones/pyrones, which exhibit high activity, selectivity, and reusability. Nano MOF sponge-covered metastable nanoparticles (NPs) converting CO2 into high value-added bioproducts provide a facile “dual-side surfactant” strategy, a highly efficient composite catalyst, and a practicable pathway not only for the sustainable use of CO2 but also for environment-friendly production of bioproducts.

Agile Construction of Porous Organic Frameworks Pending Carboxylic Acids and Imidazolium-Based Ionic Liquids for the Efficient Fixation of CO2 to Cyclic Carbonates

“…The continued consumption of fossil fuels is producing a large amount of carbon dioxide (CO 2 ) into the atmosphere, which has been one of the recognized greenhouse gases, thus causing multiple catastrophic climatic and environmental impacts, such as global warming and sea level rise. Meanwhile, CO 2 is also a potential low-cost, abundant, nontoxic, and green carbon resource to produce various high value-added chemicals, such as formamides, carboxylic acids, urea derivates, alkylamines, and alcohols (Scheme ). Among them, the coupling reaction of epoxides and CO 2 to synthesize cyclic carbonates has attracted much attention, , as the cyclic carbonates can be used as polar solvents and electrolytes of lithium batteries, polycarbonate polyurethane precursors, pharmaceutical production, fine chemicals, and agricultural chemical intermediates. , …”

Mesotrione Conjugation Strategies to Create Proherbicides with Reduced Soil Mobility

“…To create an effective proherbicide, the enolizable β-triketone moiety of mesotrione was chosen as a target location for conjugation. The anionic form of mesotrione is more water-soluble, which could lead to environmental problems through groundwater leaching. , Moreover, other β-triketones are used for a variety of applications including additional herbicides, insecticides, human therapeutics, recyclable plastics, solid phase peptide synthesis, and CO 2 utilization . Therefore, understanding conjugation strategies to mesotrione’s β-triketone functional group could possibly be transferrable to other important compounds.…”

“…23,24 Moreover, other β-triketones are used for a variety of applications including additional herbicides, insecticides, 25 human therapeutics, 10 recyclable plastics, 26 solid phase peptide synthesis, 27 and CO 2 utilization. 28 Therefore, understanding conjugation strategies to mesotrione's β-triketone functional group could possibly be transferrable to other important compounds.…”

Natural Kaolin-Based Ni Catalysts for CO2 Methanation: On the Effect of Ce Enhancement and Microwave-Assisted Hydrothermal Synthesis

“…Climate change and global warming as important threats to the human society are closely associated with energy consumption and greenhouse gas (GHG) emissions . Carbon dioxide (CO 2 ) as the primary GHG (∼80%) is mainly emitted by human activities from various sectors such as electricity and heat, transport, industrial, residential, and other sectors. − The combustion of fossil fuels such as coal, natural gas (NG), and petroleum oil for energy supply is the main activity that emits CO 2 to the atmosphere. , In addition, billion tons of CO 2 emissions are likely increased every year because of the ever-increasing energy consumption. ,, Many research attempts have been dedicated to developing efficient processes to reduce CO 2 emissions by the utilization of captured CO 2 as a feedstock for the production of commodity chemicals and fuels. − Nowadays, only a few commercial processes that involve the conversion of CO 2 into value-added chemicals exist, for example, processes for production of salicylic acid, urea, and cyclic carbonates. , Emerging technologies for CO 2 conversion into commodity chemicals such as dimethyl ether, formic acid, carbon monoxide, ethylene, dimethylcarbonate, diphenylcarbonate, polymers (polycarbonates and polyurethanes), carboxylic acid, and others have been introduced. , However, CO 2 recycling into fuels such as methanol, ethanol, and methane would have a meaningful impact on the reduction of CO 2 emissions . The synthetic fuels from CO 2 are expected to play a major role in CO 2 emission management strategies due to (i) the world fuel market which is 2 orders of magnitude larger than that of chemicals and (ii) CO 2 emissions mainly being associated with the energy consumption .…”

“…8−10 Nowadays, only a few commercial processes that involve the conversion of CO 2 into value-added chemicals exist, for example, processes for production of salicylic acid, urea, and cyclic carbonates. 11,12 Emerging technologies for CO 2 conversion into commodity chemicals such as dimethyl ether, 13 formic acid, 14 carbon monoxide, 15 ethylene, 16 dimethylcarbonate, diphenylcarbonate, 17 polymers (polycarbonates and polyurethanes), 18 carboxylic acid, 19 and others have been introduced. 12,20 However, CO 2 recycling into fuels such as methanol, ethanol, and methane would have a meaningful impact on the reduction of CO 2 emissions.…”