Recent Advances in Carbon-Based Iron Catalysts for Organic Synthesis

Nanomaterials, Journal Year: 2022, Volume and Issue: 12(19), P. 3462 - 3462

Published: Oct. 3, 2022

Carbon-based iron catalysts combining the advantages of and carbon material are efficient sustainable for green organic synthesis. The present review summarizes recent examples carbon-based reactions, including reduction, oxidation, tandem other reactions. In addition, introduction strategies into materials structure activity relationship (SAR) between these reactions also highlighted. Moreover, challenges opportunities synthesis over have been addressed. This will stimulate more systematic in-depth investigations on exploring chemistry.

Language: Английский

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Innovative Long-Lasting Catalytic Hydrothermal Reaction for High Efficient Energy Harvest and Carbon Capture from Recalcitrant Wastewater

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(30), P. 11325 - 11335

Published: July 3, 2023

Simultaneous recovery of energy and carbon from recalcitrant wastewater has attracted ever-growing interest for water management. However, the existing technologies to break down pollutants are mainly chemical intensive. Here, a novel hydrothermal reaction amended with activated (AC) was demonstrated enable an unprecedented 99.5% removal exemplar difficult-to-degrade contaminant, polyvinyl alcohol (PVA), wastewater. Meanwhile, easy-separated hydrochar (C6H7.08O0.99) abundance unsaturated aromatic rings produced, exhibiting 118.46% yield high heating value 32.9 MJ/kg, outperforming hydrochar(s) reported date. The retrieved able entirely offset needs this process. Interestingly, AC catalyst can sustain in situ reuse over 125 cycles no evidence irreversible deactivation. adjacent carbonyl groups on were revealed provide active sites dehydrogenation either C–H (1.24 Å) or O–H (1.40 bond PVA, forming hydroxyl highly reactive intermediates (ΔG0 = −11.5 kcal/mol). It further proved that free oxygen headspace extracted H atoms newly formed −4.7 kcal/mol), thus regenerating next catalytic cycles. long-lasting reusability self-sufficient approach offer sustainable route neutrality treatment.

Language: Английский

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N, Si-codoped carbon-based iron catalyst for efficient, selective synthesis of pyrroles from nitroarenes: The role of Si doping

Journal of Catalysis, Journal Year: 2022, Volume and Issue: 416, P. 39 - 46

Published: Oct. 29, 2022

Language: Английский

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Production of Alkyl Levulinates from Carbohydrate-Derived Chemical Intermediates Using Phosphotungstic Acid Supported on Humin-Derived Activated Carbon (PTA/HAC) as a Recyclable Heterogeneous Acid Catalyst

Chemistry, Journal Year: 2023, Volume and Issue: 5(2), P. 800 - 812

Published: April 6, 2023

This work reports a straightforward and high-yielding synthesis of alkyl levulinates (ALs), class promising biofuel, renewable solvent, chemical feedstock origin. ALs were prepared by the acid-catalyzed esterification levulinic acid (LA) alcoholysis carbohydrate-derived platforms, such as furfuryl alcohol (FAL) α-angelica lactone (α-AGL). Phosphotungstic (PTA) was chosen solid catalyst for transformation, which heterogenized on humin-derived activated carbon (HAC) superior recyclability. Using HAC support expands scope valorizing humin, complex furanic resin produced inevitably side product (often considered waste) during hydrolysis/dehydration sugars polymeric carbohydrates. Under optimized conditions (150 °C, 7 h, 25 wt.% 20%PTA/HAC-600 catalyst), ethyl levulinate (EL) obtained in an 85% isolated yield starting from FAL. general synthetic protocol, EL 88% 84% yields LA α-AGL, respectively. The successfully recovered reaction mixture recycled five cycles. A marginal loss observed consecutive catalytic cycles due to partial leaching PTA support.

Language: Английский

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Single atom Cu anchored graphitic-C₃N₅ for photocatalytic selective oxidation of biomass-derived furfurals to maleic anhydride

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(35), P. 23897 - 23909

Published: Jan. 1, 2024

A copper single-atom catalyst (Cu 1 @C 3 N 5 -1) has been developed for photocatalytic oxidation of biomass-derived furfural and 5-hydroxymethylfurfural to obtain maleic anhydride. O 2 ·O − play a synergetic role during the reaction.

Language: Английский

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