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Synthesis of stable, hydrophobic MCM-48/VOx catalysts using alkylchlorosilanes as coupling agents for the molecular designed dispersion of VO(acac)2

(1999) JOURNAL OF PHYSICAL CHEMISTRY B. 103(46). p.10102-10108
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Abstract
The use of dimethyldichlorosilane as a coupling agent for the grafting of VOx structures on the MCM-48 surface produces a material that is simultaneously hydrophobic (immiscible with water) and very active (all V centers are accessible, even for water molecules). The VOx surface species are grafted by the molecular designed dispersion of VO(acac)(2) on the silylated surface, followed by a calcination in air at 450 degrees C. These hydrophobic MCM-48 supported VOx catalysts are thermally stable up to 500 degrees C. The grafted VOx surface species are very resistant toward leaching-out in aqueous media. Also, the structural and hydrothermal stability has improved enormously. The crystallinity of the materials does not decrease when the samples are subjected to a hydrothermal treatment at 150 degrees C and 4.7 atm pressure. A reaction mechanism is proposed and consolidated by FT-IR, Raman spectroscopy, and UV-vis diffuse reflectance. Pore size distributions, water adsorption isotherms, and X-ray diffractograms confirm the structural stability of these materials.
Keywords
ADSORPTION, VANADIUM-OXIDE CATALYSTS, SURFACE, MCM-41, ACETYLACETONATE, SILICAS, SIEVES

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Citation

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MLA
Van Der Voort, Pascal, et al. “Synthesis of Stable, Hydrophobic MCM-48/VOx Catalysts Using Alkylchlorosilanes as Coupling Agents for the Molecular Designed Dispersion of VO(Acac)2.” JOURNAL OF PHYSICAL CHEMISTRY B, vol. 103, no. 46, 1999, pp. 10102–08, doi:10.1021/jp992146u.
APA
Van Der Voort, P., Baltes, M., & Vansant, E. (1999). Synthesis of stable, hydrophobic MCM-48/VOx catalysts using alkylchlorosilanes as coupling agents for the molecular designed dispersion of VO(acac)2. JOURNAL OF PHYSICAL CHEMISTRY B, 103(46), 10102–10108. https://doi.org/10.1021/jp992146u
Chicago author-date
Van Der Voort, Pascal, M Baltes, and EF Vansant. 1999. “Synthesis of Stable, Hydrophobic MCM-48/VOx Catalysts Using Alkylchlorosilanes as Coupling Agents for the Molecular Designed Dispersion of VO(Acac)2.” JOURNAL OF PHYSICAL CHEMISTRY B 103 (46): 10102–8. https://doi.org/10.1021/jp992146u.
Chicago author-date (all authors)
Van Der Voort, Pascal, M Baltes, and EF Vansant. 1999. “Synthesis of Stable, Hydrophobic MCM-48/VOx Catalysts Using Alkylchlorosilanes as Coupling Agents for the Molecular Designed Dispersion of VO(Acac)2.” JOURNAL OF PHYSICAL CHEMISTRY B 103 (46): 10102–10108. doi:10.1021/jp992146u.
Vancouver
1.
Van Der Voort P, Baltes M, Vansant E. Synthesis of stable, hydrophobic MCM-48/VOx catalysts using alkylchlorosilanes as coupling agents for the molecular designed dispersion of VO(acac)2. JOURNAL OF PHYSICAL CHEMISTRY B. 1999;103(46):10102–8.
IEEE
[1]
P. Van Der Voort, M. Baltes, and E. Vansant, “Synthesis of stable, hydrophobic MCM-48/VOx catalysts using alkylchlorosilanes as coupling agents for the molecular designed dispersion of VO(acac)2,” JOURNAL OF PHYSICAL CHEMISTRY B, vol. 103, no. 46, pp. 10102–10108, 1999.
@article{8054330,
  abstract     = {{The use of dimethyldichlorosilane as a coupling agent for the grafting of VOx structures on the MCM-48 surface produces a material that is simultaneously hydrophobic (immiscible with water) and very active (all V centers are accessible, even for water molecules). The VOx surface species are grafted by the molecular designed dispersion of VO(acac)(2) on the silylated surface, followed by a calcination in air at 450 degrees C. These hydrophobic MCM-48 supported VOx catalysts are thermally stable up to 500 degrees C. The grafted VOx surface species are very resistant toward leaching-out in aqueous media. Also, the structural and hydrothermal stability has improved enormously. The crystallinity of the materials does not decrease when the samples are subjected to a hydrothermal treatment at 150 degrees C and 4.7 atm pressure. A reaction mechanism is proposed and consolidated by FT-IR, Raman spectroscopy, and UV-vis diffuse reflectance. Pore size distributions, water adsorption isotherms, and X-ray diffractograms confirm the structural stability of these materials.}},
  author       = {{Van Der Voort, Pascal and Baltes, M and Vansant, EF}},
  issn         = {{1089-5647}},
  journal      = {{JOURNAL OF PHYSICAL CHEMISTRY B}},
  keywords     = {{ADSORPTION,VANADIUM-OXIDE CATALYSTS,SURFACE,MCM-41,ACETYLACETONATE,SILICAS,SIEVES}},
  language     = {{eng}},
  number       = {{46}},
  pages        = {{10102--10108}},
  title        = {{Synthesis of stable, hydrophobic MCM-48/VOx catalysts using alkylchlorosilanes as coupling agents for the molecular designed dispersion of VO(acac)2}},
  url          = {{http://doi.org/10.1021/jp992146u}},
  volume       = {{103}},
  year         = {{1999}},
}

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