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Alkaline-doped multiwall carbon nanotubes as efficient catalysts for the Knoevenagel condensation

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dc.contributor.author Delgado Gómez, Francisco José
dc.contributor.author Calvino Casilda, Vanesa
dc.contributor.author Cerpa Naranjo, Arisbel
dc.contributor.author Rojas Cervantes, María Luisa
dc.date.accessioned 2017-12-08T19:18:36Z
dc.date.available 2017-12-08T19:18:36Z
dc.date.issued 2017
dc.identifier.citation Delgado-Gómez, F. J., Calvino-Casilda, V., Cerpa-Naranjo, A., & Rojas-Cervantes, M. L. (2017). Alkaline-doped multiwall carbon nanotubes as efficient catalysts for the Knoevenagel condensation. Molecular Catalysis, 443, 101-109. spa
dc.identifier.issn 2468-8231
dc.identifier.uri http://hdl.handle.net/11268/6849
dc.description.abstract A series of alkaline doped multiwall carbon nanotubes, CNTOM (with M = Li, Na, K, Cs) has been prepared by wetness impregnation with alkaline acetates and subsequent pyrolysis of commercial multiwall carbon nanotubes previously oxidized with nitric acid, characterized by different physico-chemical techniques and tested as catalysts in the Knoevenagel condensation between benzaldehyde and different active methylene compounds. As determined by different techniques, caesium has been incorporated in a less extent than the rest of alkalines. The SBET values decrease in the CNTOM with respect to the raw material, mainly due to the blockage of micropores and small mesopores by the metallic phase formed. As deduced from PZC values, the character of the surface of nanotubes changes from acid for the oxidized sample to basic for the alkaline doped nanotubes, the basic character decreasing with the size of the alkaline cation. The order of activity observed in the Knoevenagel condensation between benzaldehyde and ethyl cyanoacetate seems to be correlated mainly with the amount of basic centres, CNTOCs being the less active catalyst due to its lower metal content. Conversion values of benzaldehyde comprised between 67 and 89% were achieved in only 120 min. [Publisher abstract] spa
dc.description.sponsorship CTM2014-56668-R spa
dc.language.iso eng spa
dc.title Alkaline-doped multiwall carbon nanotubes as efficient catalysts for the Knoevenagel condensation spa
dc.type article spa
dc.description.impact 1.069 SJR (2017) Q1, 34/157 Physical and Theoretical Chemistry, 8/101 Process Chemistry and Technology; Q2, 18/57 Catalysis spa
dc.identifier.doi 10.1016/j.mcat.2017.09.016
dc.rights.accessRights closedAccess spa
dc.subject.uem Nanotecnología spa
dc.subject.unesco Nanotecnología spa
dc.description.filiation UEM spa
dc.peerreviewed Si spa


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