Streamlined synthesis of iron and cobalt loaded MCM-48: High-performance heterogeneous catalysts for selective liquid-phase oxidation of toluene to benzaldehyde
Hydrothermal synthesis of MCM-48 molecular sieves featuring the incorporation of both iron and cobalt with Si/M ratios of 20, 40 and 80 (where M represents either iron or cobalt) was performed using tetraethyl orthosilicate as the silica source and cetyltrimethylammonium bromide as a template. To ga...
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| Formato: | Artigo |
| Idioma: | English |
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Elsevier
2024-03-01
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| Series: | Heliyon |
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| Acceso en liña: | http://www.sciencedirect.com/science/article/pii/S2405844024033279 |
| _version_ | 1827294088916893696 |
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| author | Arnab Kalita Anup Kumar Talukdar |
| author_facet | Arnab Kalita Anup Kumar Talukdar |
| author_sort | Arnab Kalita |
| collection | DOAJ |
| description | Hydrothermal synthesis of MCM-48 molecular sieves featuring the incorporation of both iron and cobalt with Si/M ratios of 20, 40 and 80 (where M represents either iron or cobalt) was performed using tetraethyl orthosilicate as the silica source and cetyltrimethylammonium bromide as a template. To gain a comprehensive understanding of the synthesized materials, these were thoroughly characterized using various techniques, including XRD, XPS, UV–Vis (DRS), FT-IR, N2 adsorption-desorption analysis, SEM with EDX, TEM, TGA and NH3-TPD analysis. XRD analysis revealed the presence of well-ordered MCM-48 structure in the metal-incorporated materials, while XPS and UV–Vis DRS confirmed the successful partial incorporation of metal ions precisely in their desired tetrahedral coordination within the framework. To assess their catalytic performance, we studied the activity and selectivity of these catalysts in liquid phase oxidation of toluene using tert-butyl hydroperoxide as the oxidant. Under optimized conditions, employing a 6% (w/w) Fe-MCM-48 (40) catalyst and maintaining a toluene to oxidant molar ratio of 1:3 at 353 K in a solvent-free environment for 8 h, the oxidation reaction resulted in the formation of benzaldehyde (88.1%) as the major product and benzyl alcohol (11.9%) as the minor product. |
| first_indexed | 2024-04-24T13:51:02Z |
| format | Article |
| id | doaj.art-fe80b44153644bc2813a4b18b2e569fe |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-24T13:51:02Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-fe80b44153644bc2813a4b18b2e569fe2024-04-04T05:04:34ZengElsevierHeliyon2405-84402024-03-01106e27296Streamlined synthesis of iron and cobalt loaded MCM-48: High-performance heterogeneous catalysts for selective liquid-phase oxidation of toluene to benzaldehydeArnab Kalita0Anup Kumar Talukdar1Corresponding author..; Department of Chemistry, Gauhati University, Gopinath Bordoloi Nagar, Jalukbari, Guwahati, Assam, 781014, IndiaDepartment of Chemistry, Gauhati University, Gopinath Bordoloi Nagar, Jalukbari, Guwahati, Assam, 781014, IndiaHydrothermal synthesis of MCM-48 molecular sieves featuring the incorporation of both iron and cobalt with Si/M ratios of 20, 40 and 80 (where M represents either iron or cobalt) was performed using tetraethyl orthosilicate as the silica source and cetyltrimethylammonium bromide as a template. To gain a comprehensive understanding of the synthesized materials, these were thoroughly characterized using various techniques, including XRD, XPS, UV–Vis (DRS), FT-IR, N2 adsorption-desorption analysis, SEM with EDX, TEM, TGA and NH3-TPD analysis. XRD analysis revealed the presence of well-ordered MCM-48 structure in the metal-incorporated materials, while XPS and UV–Vis DRS confirmed the successful partial incorporation of metal ions precisely in their desired tetrahedral coordination within the framework. To assess their catalytic performance, we studied the activity and selectivity of these catalysts in liquid phase oxidation of toluene using tert-butyl hydroperoxide as the oxidant. Under optimized conditions, employing a 6% (w/w) Fe-MCM-48 (40) catalyst and maintaining a toluene to oxidant molar ratio of 1:3 at 353 K in a solvent-free environment for 8 h, the oxidation reaction resulted in the formation of benzaldehyde (88.1%) as the major product and benzyl alcohol (11.9%) as the minor product.http://www.sciencedirect.com/science/article/pii/S2405844024033279TolueneBenzaldehydeHeterogeneousMesoporous |
| spellingShingle | Arnab Kalita Anup Kumar Talukdar Streamlined synthesis of iron and cobalt loaded MCM-48: High-performance heterogeneous catalysts for selective liquid-phase oxidation of toluene to benzaldehyde Heliyon Toluene Benzaldehyde Heterogeneous Mesoporous |
| title | Streamlined synthesis of iron and cobalt loaded MCM-48: High-performance heterogeneous catalysts for selective liquid-phase oxidation of toluene to benzaldehyde |
| title_full | Streamlined synthesis of iron and cobalt loaded MCM-48: High-performance heterogeneous catalysts for selective liquid-phase oxidation of toluene to benzaldehyde |
| title_fullStr | Streamlined synthesis of iron and cobalt loaded MCM-48: High-performance heterogeneous catalysts for selective liquid-phase oxidation of toluene to benzaldehyde |
| title_full_unstemmed | Streamlined synthesis of iron and cobalt loaded MCM-48: High-performance heterogeneous catalysts for selective liquid-phase oxidation of toluene to benzaldehyde |
| title_short | Streamlined synthesis of iron and cobalt loaded MCM-48: High-performance heterogeneous catalysts for selective liquid-phase oxidation of toluene to benzaldehyde |
| title_sort | streamlined synthesis of iron and cobalt loaded mcm 48 high performance heterogeneous catalysts for selective liquid phase oxidation of toluene to benzaldehyde |
| topic | Toluene Benzaldehyde Heterogeneous Mesoporous |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024033279 |
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