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Nanosized vanadium, tungsten and molybdenum oxide clusters grown in porous chitosan microspheres as promising hybrid materials for selective alcohol oxidation

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Nanosized vanadium, tungsten and molybdenum oxide clusters grown in porous chitosan microspheres as promising hybrid materials for selective alcohol oxidation

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El Kadib, A.; Primo Arnau, AM.; Molvinger, K.; Bousmina, M.; Brunel, D. (2011). Nanosized vanadium, tungsten and molybdenum oxide clusters grown in porous chitosan microspheres as promising hybrid materials for selective alcohol oxidation. Chemistry - A European Journal. 17:7940-7946. doi:10.1002/chem.201003740

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Título: Nanosized vanadium, tungsten and molybdenum oxide clusters grown in porous chitosan microspheres as promising hybrid materials for selective alcohol oxidation
Autor: El Kadib, Abdelkrim Primo Arnau, Ana María Molvinger, Karine Bousmina, Mosto Brunel, Daniel
Entidad UPV: Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química
Fecha difusión:
Resumen:
The ability of chitosan biopolymer to coordinate vanadium, tungsten and molybdenum metallic species and to control their mineralisation growth provides a new family of surface-reactive organic-inorganic hybrid microspheres. ...[+]
Palabras clave: Alcohols , Chitosan , Nanostructures , Organic-inorganic hybrid composites , Oxidation
Derechos de uso: Cerrado
Fuente:
Chemistry - A European Journal. (issn: 0947-6539 )
DOI: 10.1002/chem.201003740
Editorial:
Wiley-VCH Verlag
Versión del editor: http://dx.doi.org/10.1002/chem.201003740
Agradecimientos:
This work was supported by the Hassan II Academy of Science, Innovation and Research (Morocco). We are grateful to Dr. Claude Guillmon for XPS analysis and to Hassan Hafidi (IT Manager) for his technical assistance.
Tipo: Artículo

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Sorokin, A. B., Quignard, F., Valentin, R., & Mangematin, S. (2006). Chitosan supported phthalocyanine complexes: Bifunctional catalysts with basic and oxidation active sites. Applied Catalysis A: General, 309(2), 162-168. doi:10.1016/j.apcata.2006.03.060

Guo, C.-C., Huang, G., Zhang, X.-B., & Guo, D.-C. (2003). Catalysis of chitosan-supported iron tetraphenylporphyrin for aerobic oxidation of cyclohexane in absence of reductants and solvents. Applied Catalysis A: General, 247(2), 261-267. doi:10.1016/s0926-860x(03)00108-x

Karimi, B., & Kabiri Esfahani, F. (2009). Gold nanoparticles supported on Cs2CO3 as recyclable catalyst system for selective aerobic oxidation of alcohols at room temperature. Chemical Communications, (37), 5555. doi:10.1039/b908964k

When monitoring the degradation of the materials used in catalysis by thermogravimetric analysis (TGA)/mass spectroscopy no product attributed to the oxidation of the support was observed.

Chitosan has been shown to be effective for adsorption and removal of vanadium tungsten and molybdenum from aqueous solutions:

Qian, S., Wang, H., Huang, G., Mo, S., & Wei, W. (2004). Studies of adsorption properties of crosslinked chitosan for vanadium(V), tungsten(VI). Journal of Applied Polymer Science, 92(3), 1584-1588. doi:10.1002/app.20102

Kufelnicki, A., Lichawska, M. E., & Bodek, K. H. (2009). Interaction of microcrystalline chitosan (MCCh) with Mo(VI) in aqueous solution. Journal of Applied Polymer Science, 114(3), 1619-1625. doi:10.1002/app.30756

Qian, S. H., Xue, A. F., Xiao, M., & Chen, H. (2006). Application of crosslinked chitosan in the analysis of ultratrace Mo(VI). Journal of Applied Polymer Science, 101(1), 432-435. doi:10.1002/app.23251

Navarro, R., Guzmán, J., Saucedo, I., Revilla, J., & Guibal, E. (2003). Recovery of Metal Ions by Chitosan: Sorption Mechanisms and Influence of Metal Speciation. Macromolecular Bioscience, 3(10), 552-561. doi:10.1002/mabi.200300013

Guzmán, J., Saucedo, I., Navarro, R., Revilla, J., & Guibal, E. (2002). Vanadium Interactions with Chitosan:  Influence of Polymer Protonation and Metal Speciation. Langmuir, 18(5), 1567-1573. doi:10.1021/la010802n

In some cases the fast re‐deposition of the leached active species back onto the support can result in a misconception about the result. So in the absence of an exhaustive study on this phenomenon the following results have to be carefully interpreted.

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