N/Se co-doped porous carbon catalyst derived from a deep eutectic solvent and chitosan as green precursors: Investigation of catalytic activity for metal-free oxidation of alcohols

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 273, С. 133007 - 133007

Опубликована: Июнь 12, 2024

Язык: Английский

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Synthesis and application of an effective magnetic catalyst immobilized copper oxide for the one-pot ultrasound-assisted synthesis of 1,4-dihydropyridines

Journal of Organometallic Chemistry, Год журнала: 2024, Номер 1021, С. 123352 - 123352

Опубликована: Авг. 31, 2024

Язык: 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, Год журнала: 2022, Номер 416, С. 39 - 46

Опубликована: Окт. 29, 2022

Язык: 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, Год журнала: 2023, Номер 5(2), С. 800 - 812

Опубликована: Апрель 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.

Язык: 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, Год журнала: 2024, Номер 12(35), С. 23897 - 23909

Опубликована: Янв. 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.

Язык: Английский

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