Selective oxidation of HMF to DFF using Ru/γ-alumina catalyst in moderate boiling solvents toward industrial production

Antonyraj, Churchil A.; Jeong, Jee–Heon; Kim, Bora; Shin, Seunghan; Kim, Sang Yong; Lee, Kwan Young

doi:10.1016/j.jiec.2012.12.002

Cited by 150 publications

(73 citation statements)

References 24 publications

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“…[45] Notably, the spectrum of recovered Cs 3 HPMo 11 VO 40 shows additional peaks at ñ = 2998 (assigned Table 2. to the stretching vibration of =CH), 1737 (assigned to the stretching vibration of C=O), 1390 (assigned to the bending vibration of CÀH), and 1120 cm À1 (assigned to the stretching vibration of CÀO). [28,52] These results indicate the presence of insoluble polymeric furanic compounds on the surface of Cs 3 HPMo 11 VO 40 after reuse. Therefore, our results suggest that the slightly reduced catalytic performance of Cs 3 HPMo 11 VO 40 in catalyst reusability can reasonably be attributed to the adsorption and accumulation of oligomeric products on the catalyst surface, which presumably block the catalytic sites.…”

Section: Reusability Of the Catalystmentioning

confidence: 80%

“…Therefore, our results suggest that the slightly reduced catalytic performance of Cs 3 HPMo 11 VO 40 in catalyst reusability can reasonably be attributed to the adsorption and accumulation of oligomeric products on the catalyst surface, which presumably block the catalytic sites. [28,53] …”

Section: Reusability Of the Catalystmentioning

confidence: 99%

“…Recently, Karimi and coworkers employed a magnetically separable catalyst (Fe 3 O 4 @SiO 2 -TEMPO) for the selective oxidation of HMF to DFF under metal-and halogen-free conditions. [19] In addition to organic catalysis, a series of transition-metal catalysts, such as vanadium, [20][21][22][23] manganese, [24,25] cobalt, [26] ruthenium, [27][28][29][30] copper, [31] iron, [32] silver, [33] and palladium, [34] were recently developed for HMF-to-DFF transformation and HMF conversion into 2,5-furandicarboxylic acid (FDCA) with molecular oxygen or air as the oxidants under a milder and more sustainable route.…”

Section: Introductionmentioning

confidence: 99%

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One‐Step Approach to 2,5‐Diformylfuran from Fructose by Using a Bifunctional and Recyclable Acidic Polyoxometalate Catalyst

Liu

Chen

et al. 2014

ChemPlusChem

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A series of acidic cesium salts of molybdovanadophosphoric heteropolyacids (CsMVP‐HPAs) are developed as bifunctional and recyclable catalysts for a one‐step approach to 2,5‐diformylfuran (DFF) from fructose with molecular oxygen as the oxidant under environmentally benign conditions. The CsMVP‐HPAs afford the direct synthesis of DFF from fructose through acidic site (H)‐promoted fructose dehydration and metallic site (V)‐catalyzed successive aerobic oxidation of 5‐hydroxymethylfurfural (HMF). The catalytic performances of CsMVP‐HPA toward fructose dehydration and HMF oxidation are related to its acid density and V content, respectively. Moreover, the increase in the V content of CsMVP‐HPA results in its decreased acid density, which suggests its converse catalytic performance toward fructose dehydration and HMF oxidation. An optimum balance between the dehydration and oxidation functions of CsMVP‐HPAs reveals that a ratio of acid density to molar concentration of V between 1.64 and 3.34 achieves a maximum yield of 60 % for DFF from fructose with Cs3HPMo11VO40 as a catalyst under atmospheric pressure of oxygen. Moreover, Cs3HPMo11VO40 behaves as a heterogeneous catalyst and can be easily reused at least for four times. This research highlights an efficient bifunctional catalyst for transforming renewables into fine chemicals in tandem reactions of dehydration and oxidation.

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Section: Reusability Of the Catalystmentioning

confidence: 80%

Section: Reusability Of the Catalystmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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One‐Step Approach to 2,5‐Diformylfuran from Fructose by Using a Bifunctional and Recyclable Acidic Polyoxometalate Catalyst

Liu

Chen

et al. 2014

ChemPlusChem

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“…CuS has also been widely studied, with the particles finding more attention due to their low toxicity. Some of the reported potential applications of metal chalcogenides include medical, catalysis, electrochemistry, biotechnology, trace substance detection, biomedical, biosensor, catalyst for bacterial biotoxin elimination, and lower-cost electrode [4][5][6][7][8][9][10]. Copper sulphides such as CuS (covellite), Cu 1.75 S (anilite), Cu 1.8 S (digenite), Cu 1.95 S (djurlite), and Cu 2 S are of great interest as they can be applied in energy storage, owing to their variations in stoichiometric compositions, complex structures, and valence states [11].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity of Amino Acid-Capped Zinc and Copper Sulphide Nanoparticles

Mofokeng

Moloto

Shumbula

et al. 2018

Journal of Nanotechnology

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e synthesis of polydispersed zinc sulphide and copper sulphide nanocrystals capped with polar L-alanine (Aln) and L-aspartic acid (Asp) molecules is reported. e resulting nanocrystals were characterized by UV-visible spectroscopy (UV-Vis), photoluminescence (PL), X-ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR). UV-Vis absorption spectra of all samples were blue-shifted from the bulk band edges due to quantum confinement effects. PL emission spectrum of the nanoparticles showed peaks at 453 and 433 nm for Aln-capped ZnS and CuS nanoparticles, respectively, while peaks for Asp-capped ZnS and CuS nanoparticles were observed at 455 and 367 nm, respectively. e average particle sizes for Aln-capped ZnS and Asp-capped ZnS nanoparticles synthesized at 35°C were measured to be 2.88 nm and 1.23 nm, respectively. e antibacterial properties were tested using different strains of both positive and negative bacteria and fungi. It was found that capped-copper sulphide nanoparticles were more effective against the bacteria than cappedzinc sulphide nanoparticles. Staphylococcus aureus (ATCC 25923) was the most susceptible one with an MIC of 0.05 mg/mL for uncapped-CuS nanoparticles while Pseudomonas aeruginosa (ATCC 15442) and Cryptococcus neoformans (ATCC 14116) were the least ones with the MIC of 3.125 mg/mL for both uncapped-CuS and Aln-capped CuS.

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“…Many typical catalysts, such as VOPO 4 ·2 H 2 O, [9] Mn III -Salen, [10] PVP/Cu(VO), [11] Cu(NO 3 ) 2 /VOSO 4 , [12] VO x /TiO 2 , [13] V 2 O 5 / zeolite, [14] intercalated vanadium phosphate oxides, [15] Ru/g-alumina, [16] V-Cu-sulfonated carbon, [17] RuCo(OH) 2 CeO 2 , [18] and Fe 3 O 4 /Mn 3 O 4 , [19] had been found to exhibit good performance.…”

Section: Introductionmentioning

confidence: 99%

One‐pot, One‐step Synthesis of 2,5‐Diformylfuran from Carbohydrates over Mo‐Containing Keggin Heteropolyacids

et al. 2014

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In this work, a one-pot strategy for directly converting fructose into 2,5-diformylfuran (DFF) over Mo-containing Keggin heteropolyacids (HPAs) in open air is developed. H3 PMo12 O40 HPA is found to show high activity and selectivity to the formation of DFF owing to its higher Brønsted acidity and moderate redox potential. The partial substitution of the H(+) in H3 PMo12 O40 with Cs(+) leads to the heterogenization of the HPA by forming its cesium salts Csx H3-x PMo12 (x=0.5, 1.5, and 2.5). A satisfactory yield of 69.3% to DFF is obtained over Cs0.5 H2.5 PMo12 polyoxometalate after deliberate optimization of the reaction conditions. The heterogenized polyoxometalate could be recycled and reused without significant loss of catalytic activity for five runs. The produced DFF could be separated from the resulting mixture by an adsorption-desorption method using activated carbon as the adsorbent and furfural as the desorbent. A highest isolated yield of 58.2% is obtained.

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Selective oxidation of HMF to DFF using Ru/γ-alumina catalyst in moderate boiling solvents toward industrial production

Cited by 150 publications

References 24 publications

One‐Step Approach to 2,5‐Diformylfuran from Fructose by Using a Bifunctional and Recyclable Acidic Polyoxometalate Catalyst

One‐Step Approach to 2,5‐Diformylfuran from Fructose by Using a Bifunctional and Recyclable Acidic Polyoxometalate Catalyst

Antimicrobial Activity of Amino Acid-Capped Zinc and Copper Sulphide Nanoparticles

One‐pot, One‐step Synthesis of 2,5‐Diformylfuran from Carbohydrates over Mo‐Containing Keggin Heteropolyacids

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