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Vanadia supported on nickel manganese oxide nanocatalysts for the catalytic oxidation of aromatic alcohols.

Adil SF, Alabbad S, Kuniyil M, Khan M, Alwarthan A, Mohri N, Tremel W, Tahir MN, Siddiqui MR - Nanoscale Res Lett (2015)

Bottom Line: It was observed that the calcination temperature and the size of particles play an important role in the catalytic process.The catalyst was evaluated for its oxidation property against aliphatic and aromatic alcohols, which was found to display selectivity towards aromatic alcohols.The samples were characterized by employing scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller analysis, thermogravimetric analysis, and X-ray photoelectron spectroscopy.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh, 11451 Kingdom of Saudi Arabia.

ABSTRACT
Vanadia nanoparticles supported on nickel manganese mixed oxides were synthesized by co-precipitation method. The catalytic properties of these materials were investigated for the oxidation of benzyl alcohol using molecular oxygen as oxidant. It was observed that the calcination temperature and the size of particles play an important role in the catalytic process. The catalyst was evaluated for its oxidation property against aliphatic and aromatic alcohols, which was found to display selectivity towards aromatic alcohols. The samples were characterized by employing scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller analysis, thermogravimetric analysis, and X-ray photoelectron spectroscopy.

No MeSH data available.


Graphical illustration of the kinetics of the catalyst and bar chart depicting conversion product obtained. Graphical illustration of the (a) kinetics of the catalyst for the conversion of benzyl alcohol to benzaldehyde using the synthesized catalyst (i) V2O5 (1%)-NiMnO, (ii) V2O5 (3%)-NiMnO, and (iii) V2O5 (5%)-NiMnO; (b) bar chart depicting conversion product obtained with different composition percentages of vanadia in the catalyst.
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Fig6: Graphical illustration of the kinetics of the catalyst and bar chart depicting conversion product obtained. Graphical illustration of the (a) kinetics of the catalyst for the conversion of benzyl alcohol to benzaldehyde using the synthesized catalyst (i) V2O5 (1%)-NiMnO, (ii) V2O5 (3%)-NiMnO, and (iii) V2O5 (5%)-NiMnO; (b) bar chart depicting conversion product obtained with different composition percentages of vanadia in the catalyst.

Mentions: The kinetics of the reaction were studied by collecting the sample in regular intervals of 15 min and subjected to gas chromatography from which the percentage conversion was calculated. It was observed that the catalyst with 1% and 3% V2O5 start of by giving 30% and 37% conversion product, respectively, in the first 15 min of the reaction time. However, as the reaction proceeds, the rate slows down, and after 75 min, there was very slight change in the conversion product obtained; hence, the reaction was not carried on further. But the catalyst with 5% V2O5 yields about 52% conversion product in the first 15 min and gradually proceeds to the 100% conversion in 60 min. From this, it can be clearly stated that there is a promoter effect on the catalytic performance of the catalyst by incorporating vanadium oxide nanoparticles. The selectivity in all the above reactions was found to be >99%. A graphical illustration is given in Figure 6.Figure 6


Vanadia supported on nickel manganese oxide nanocatalysts for the catalytic oxidation of aromatic alcohols.

Adil SF, Alabbad S, Kuniyil M, Khan M, Alwarthan A, Mohri N, Tremel W, Tahir MN, Siddiqui MR - Nanoscale Res Lett (2015)

Graphical illustration of the kinetics of the catalyst and bar chart depicting conversion product obtained. Graphical illustration of the (a) kinetics of the catalyst for the conversion of benzyl alcohol to benzaldehyde using the synthesized catalyst (i) V2O5 (1%)-NiMnO, (ii) V2O5 (3%)-NiMnO, and (iii) V2O5 (5%)-NiMnO; (b) bar chart depicting conversion product obtained with different composition percentages of vanadia in the catalyst.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385214&req=5

Fig6: Graphical illustration of the kinetics of the catalyst and bar chart depicting conversion product obtained. Graphical illustration of the (a) kinetics of the catalyst for the conversion of benzyl alcohol to benzaldehyde using the synthesized catalyst (i) V2O5 (1%)-NiMnO, (ii) V2O5 (3%)-NiMnO, and (iii) V2O5 (5%)-NiMnO; (b) bar chart depicting conversion product obtained with different composition percentages of vanadia in the catalyst.
Mentions: The kinetics of the reaction were studied by collecting the sample in regular intervals of 15 min and subjected to gas chromatography from which the percentage conversion was calculated. It was observed that the catalyst with 1% and 3% V2O5 start of by giving 30% and 37% conversion product, respectively, in the first 15 min of the reaction time. However, as the reaction proceeds, the rate slows down, and after 75 min, there was very slight change in the conversion product obtained; hence, the reaction was not carried on further. But the catalyst with 5% V2O5 yields about 52% conversion product in the first 15 min and gradually proceeds to the 100% conversion in 60 min. From this, it can be clearly stated that there is a promoter effect on the catalytic performance of the catalyst by incorporating vanadium oxide nanoparticles. The selectivity in all the above reactions was found to be >99%. A graphical illustration is given in Figure 6.Figure 6

Bottom Line: It was observed that the calcination temperature and the size of particles play an important role in the catalytic process.The catalyst was evaluated for its oxidation property against aliphatic and aromatic alcohols, which was found to display selectivity towards aromatic alcohols.The samples were characterized by employing scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller analysis, thermogravimetric analysis, and X-ray photoelectron spectroscopy.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh, 11451 Kingdom of Saudi Arabia.

ABSTRACT
Vanadia nanoparticles supported on nickel manganese mixed oxides were synthesized by co-precipitation method. The catalytic properties of these materials were investigated for the oxidation of benzyl alcohol using molecular oxygen as oxidant. It was observed that the calcination temperature and the size of particles play an important role in the catalytic process. The catalyst was evaluated for its oxidation property against aliphatic and aromatic alcohols, which was found to display selectivity towards aromatic alcohols. The samples were characterized by employing scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller analysis, thermogravimetric analysis, and X-ray photoelectron spectroscopy.

No MeSH data available.