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Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts
Goethite based nanocomposites with a different composition such as 6FeO(OH)·MnO(OH)·0.5H(2)O (Mn-composite), xFeO(OH)·M(OH)(2)·yH(2)O (Co-composite (M: Co, x = 12, y = 3), Ni-composite (M: Ni, x = 7, y = 2)) and xFeO(OH)·MO·yH(2)O (Cu-composite (M: Cu, x = 5.5, y = 3), Zn-composite (M: Zn, x = 6, y...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9037824/ https://www.ncbi.nlm.nih.gov/pubmed/35480697 http://dx.doi.org/10.1039/d1ra04211d |
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author | Kuncser, Andrei Cristian Vlaicu, Ioana Dorina Pavel, Octavian Dumitru Zavoianu, Rodica Badea, Mihaela Radu, Dana Culita, Daniela Cristina Rostas, Arpad Mihai Olar, Rodica |
author_facet | Kuncser, Andrei Cristian Vlaicu, Ioana Dorina Pavel, Octavian Dumitru Zavoianu, Rodica Badea, Mihaela Radu, Dana Culita, Daniela Cristina Rostas, Arpad Mihai Olar, Rodica |
author_sort | Kuncser, Andrei Cristian |
collection | PubMed |
description | Goethite based nanocomposites with a different composition such as 6FeO(OH)·MnO(OH)·0.5H(2)O (Mn-composite), xFeO(OH)·M(OH)(2)·yH(2)O (Co-composite (M: Co, x = 12, y = 3), Ni-composite (M: Ni, x = 7, y = 2)) and xFeO(OH)·MO·yH(2)O (Cu-composite (M: Cu, x = 5.5, y = 3), Zn-composite (M: Zn, x = 6, y = 1.5)) have been prepared by a soft chemical synthesis consisting in acetate hydrolysis. The data provided by Fourier transform infrared (FTIR), ultraviolet-visible-near infrared (UV-Vis-NIR), electron paramagnetic resonance (EPR) and Mössbauer spectra account for a slight modification of all composites' physicochemical properties compared to the starting material. Powder X-ray diffraction and transmission electron microscopy (TEM) investigations revealed the secondary phase nature and presence along with that of goethite. The TEM data are also consistent with a nano rod-like morphology with a 5–10 nm width and an average length of 40 nm. The catalytic oxidation of cyclooctene with O(2) using isobutyraldehyde as reductant and acetonitrile as a solvent was performed in batch conditions for 5 h at room temperature. The selectivity for the epoxide was higher than 99% for all tested solids. The conversion of cyclooctene decreased from 55% to 4% following the same order of variance as the base/acid sites ratio: Mn-composite > Fe-composite > Co-composite > Ni-composite > Zn-composite > Cu-composite. The 6FeO(OH)·MnO(OH)·0.5H(2)O (Mn-composite) exhibited the most promising catalytic activity in cyclooctene oxidation, which can be correlated with the redox ability of Mn(iii) combined with the increased base character of this solid. The catalytic activity of this sample decreases by 10% after several successive reaction cycles. |
format | Online Article Text |
id | pubmed-9037824 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90378242022-04-26 Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts Kuncser, Andrei Cristian Vlaicu, Ioana Dorina Pavel, Octavian Dumitru Zavoianu, Rodica Badea, Mihaela Radu, Dana Culita, Daniela Cristina Rostas, Arpad Mihai Olar, Rodica RSC Adv Chemistry Goethite based nanocomposites with a different composition such as 6FeO(OH)·MnO(OH)·0.5H(2)O (Mn-composite), xFeO(OH)·M(OH)(2)·yH(2)O (Co-composite (M: Co, x = 12, y = 3), Ni-composite (M: Ni, x = 7, y = 2)) and xFeO(OH)·MO·yH(2)O (Cu-composite (M: Cu, x = 5.5, y = 3), Zn-composite (M: Zn, x = 6, y = 1.5)) have been prepared by a soft chemical synthesis consisting in acetate hydrolysis. The data provided by Fourier transform infrared (FTIR), ultraviolet-visible-near infrared (UV-Vis-NIR), electron paramagnetic resonance (EPR) and Mössbauer spectra account for a slight modification of all composites' physicochemical properties compared to the starting material. Powder X-ray diffraction and transmission electron microscopy (TEM) investigations revealed the secondary phase nature and presence along with that of goethite. The TEM data are also consistent with a nano rod-like morphology with a 5–10 nm width and an average length of 40 nm. The catalytic oxidation of cyclooctene with O(2) using isobutyraldehyde as reductant and acetonitrile as a solvent was performed in batch conditions for 5 h at room temperature. The selectivity for the epoxide was higher than 99% for all tested solids. The conversion of cyclooctene decreased from 55% to 4% following the same order of variance as the base/acid sites ratio: Mn-composite > Fe-composite > Co-composite > Ni-composite > Zn-composite > Cu-composite. The 6FeO(OH)·MnO(OH)·0.5H(2)O (Mn-composite) exhibited the most promising catalytic activity in cyclooctene oxidation, which can be correlated with the redox ability of Mn(iii) combined with the increased base character of this solid. The catalytic activity of this sample decreases by 10% after several successive reaction cycles. The Royal Society of Chemistry 2021-08-13 /pmc/articles/PMC9037824/ /pubmed/35480697 http://dx.doi.org/10.1039/d1ra04211d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Kuncser, Andrei Cristian Vlaicu, Ioana Dorina Pavel, Octavian Dumitru Zavoianu, Rodica Badea, Mihaela Radu, Dana Culita, Daniela Cristina Rostas, Arpad Mihai Olar, Rodica Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts |
title | Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts |
title_full | Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts |
title_fullStr | Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts |
title_full_unstemmed | Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts |
title_short | Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts |
title_sort | soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9037824/ https://www.ncbi.nlm.nih.gov/pubmed/35480697 http://dx.doi.org/10.1039/d1ra04211d |
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