Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

Faria, Vinícius W.; Santos, Kryslaine M. A.; Calazans, Alannah M.; Fraga, Marco A.

doi:10.1002/cctc.202300447

Cited by 2 publications

(1 citation statement)

References 67 publications

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“…In terms of acidity, they present much lower values of Brønsted acidity, which is necessary for the major transformation of the precursors into CDs. In this sense, catalysts based on V, Nb, Sn, and Zr are widely used in processes that require strong Brønsted acidity [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of Green-Emitting Nitrogen-Doped Carbon Dots from Xylose

Rodríguez-Carballo,

García-Sancho,

Algarra

et al. 2023

Catalysts

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Carbon dots (CDs) are interesting carbon nanomaterials that exhibit great photoluminescent features, low cytotoxicity, and excellent water stability and solubility. For these reasons, many fields are starting to integrate their use for a variety of purposes. The catalytic performance of VOPO4 has been evaluated in the synthesis of nitrogen-doped carbon dots (N-CDs). The synthesis reaction was carried out at 180 °C using VOPO4 as a heterogeneous catalyst for 2 to 4 h of reaction time. After reaction, the N-CDs were purified using a novel method for the protection of the functional groups over the surfaces of the N-CDs. The morphological, superficial, and photoelectronic properties of the N-CDs were thoroughly studied by means of TEM, HRTEM, XPS, and photoluminescence measurements. The conversion of the carbon precursor was followed by HPLC. After three catalytic runs, the catalyst was still active while ensuring the quality of the N-CDs obtained. After the third cycle, the catalyst was regenerated, and it recovered its full activity. The obtained N-CDs showed a great degree of oxidized groups in their surfaces that translated into high photoluminescence when irradiated under different lasers. Due to the observed photoelectronic properties, they were then assayed in the photocatalytic degradation of methyl orange.

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Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of Green-Emitting Nitrogen-Doped Carbon Dots from Xylose

Rodríguez-Carballo,

García-Sancho,

Algarra

et al. 2023

Catalysts

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show abstract

Hydrodeoxygenation of Glycerol to Propene Over Molybdenum and Niobium Phosphate Catalysts

Enam,

Chowdhury,

Laichter

et al. 2024

ChemCatChem

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In single‐step conversion of glycerol to propene, the intricate catalytic pathways with molybdenum and niobium catalysts remain elusive. While these catalysts can effectively accelerate the hydrogenolytic cleavage of the glycerol CO bonds, resulting in a high selectivity to propene, the routes have not been thoroughly studied. This study explores the reaction routes and the role hydrogen plays in determining the product distribution. The hydrodeoxygenation (HDO) of glycerol was investigated using various glycerol purities in both batch and continuous reaction modes. Remarkably, Mo(PO4)x and Nb(PO4)x demonstrated catalytic performance with raw glycerol, indicating that impurities had no detrimental effect on the catalyst’s activity. In batch mode, a propene selectivity of 53% was achieved over Mo(PO4)x as the catalyst, highlighting the catalyst’s stability under these conditions. In continuous operation, the highest product selectivity to propene (12%) was observed at low temperatures (573 K), while more C2 to C6 alkanes were formed at increased temperatures (623 K and 673 K). Whereas a hydrogen atmosphere promotes formation of 2‐propenol, as primary precursor, to propene, an inert atmosphere leads to increased formation of propanal and dissociation products. Our work has elucidated new routes to upcycle bio‐renewable glycerol to propene over Mo(PO4)x and Nb(PO4)x catalysts.

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Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

Cited by 2 publications

References 67 publications

One-Pot Synthesis of Green-Emitting Nitrogen-Doped Carbon Dots from Xylose

One-Pot Synthesis of Green-Emitting Nitrogen-Doped Carbon Dots from Xylose

Hydrodeoxygenation of Glycerol to Propene Over Molybdenum and Niobium Phosphate Catalysts

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