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Tuning the acidic-basic properties by Zn-substitution in Mg-Al hydrotalcites as optimal catalysts for the aldol condensation reaction

Willinton Yesid Hernández Enciso (UGent) , Funda Aliç (UGent) , An Verberckmoes (UGent) and Pascal Van Der Voort (UGent)
(2017) JOURNAL OF MATERIALS SCIENCE. 52(1). p.628-642
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Abstract
Mg-Zn-Al hydrotalcites and derived mixed oxides with different Mg2+-to-Zn2+ ratios were prepared by co-precipitation in super-saturated conditions, followed by thermal decomposition at 500 A degrees C. The synthesized materials were evaluated as catalysts for the self-condensation of octanal in order to establish structure-to-functionality properties of the prepared materials. The presence of zinc affects the structural and textural properties of the as-synthesized hydrotalcites and derived mixed oxides, and provokes a remarkable modification on the acidic-basic properties of the materials as studied by CO2 and NH3-TPD. The presence of Zn2+ caused an increment in the concentration of surface acidic sites compared to the binary Mg-Al system. The samples characterized by a Zn/Mg ratio aecurrency sign1 showed the optimal ratio of acidic and basic sites and the best catalytic performance for the production of the alpha,beta-unsaturated aldehyde. The reconstruction of the layered materials (starting from the mixed oxides) caused an increment in the concentration of surface OH- groups, further modifying the selectivity of the reaction.
Keywords
SURFACE, ACETONE, HALIDES, REHYDRATION, TRANSITION-METAL, ALDEHYDES, ANIONIC CLAYS, MIXED OXIDES, HETEROGENEOUS CATALYSIS, LAYERED DOUBLE HYDROXIDES

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MLA
Hernández Enciso, Willinton Yesid et al. “Tuning the Acidic-basic Properties by Zn-substitution in Mg-Al Hydrotalcites as Optimal Catalysts for the Aldol Condensation Reaction.” JOURNAL OF MATERIALS SCIENCE 52.1 (2017): 628–642. Print.
APA
Hernández Enciso, W. Y., Aliç, F., Verberckmoes, A., & Van Der Voort, P. (2017). Tuning the acidic-basic properties by Zn-substitution in Mg-Al hydrotalcites as optimal catalysts for the aldol condensation reaction. JOURNAL OF MATERIALS SCIENCE, 52(1), 628–642.
Chicago author-date
Hernández Enciso, Willinton Yesid, Funda Aliç, An Verberckmoes, and Pascal Van Der Voort. 2017. “Tuning the Acidic-basic Properties by Zn-substitution in Mg-Al Hydrotalcites as Optimal Catalysts for the Aldol Condensation Reaction.” Journal of Materials Science 52 (1): 628–642.
Chicago author-date (all authors)
Hernández Enciso, Willinton Yesid, Funda Aliç, An Verberckmoes, and Pascal Van Der Voort. 2017. “Tuning the Acidic-basic Properties by Zn-substitution in Mg-Al Hydrotalcites as Optimal Catalysts for the Aldol Condensation Reaction.” Journal of Materials Science 52 (1): 628–642.
Vancouver
1.
Hernández Enciso WY, Aliç F, Verberckmoes A, Van Der Voort P. Tuning the acidic-basic properties by Zn-substitution in Mg-Al hydrotalcites as optimal catalysts for the aldol condensation reaction. JOURNAL OF MATERIALS SCIENCE. 2017;52(1):628–42.
IEEE
[1]
W. Y. Hernández Enciso, F. Aliç, A. Verberckmoes, and P. Van Der Voort, “Tuning the acidic-basic properties by Zn-substitution in Mg-Al hydrotalcites as optimal catalysts for the aldol condensation reaction,” JOURNAL OF MATERIALS SCIENCE, vol. 52, no. 1, pp. 628–642, 2017.
@article{8172887,
  abstract     = {Mg-Zn-Al hydrotalcites and derived mixed oxides with different Mg2+-to-Zn2+ ratios were prepared by co-precipitation in super-saturated conditions, followed by thermal decomposition at 500 A degrees C. The synthesized materials were evaluated as catalysts for the self-condensation of octanal in order to establish structure-to-functionality properties of the prepared materials. The presence of zinc affects the structural and textural properties of the as-synthesized hydrotalcites and derived mixed oxides, and provokes a remarkable modification on the acidic-basic properties of the materials as studied by CO2 and NH3-TPD. The presence of Zn2+ caused an increment in the concentration of surface acidic sites compared to the binary Mg-Al system. The samples characterized by a Zn/Mg ratio aecurrency sign1 showed the optimal ratio of acidic and basic sites and the best catalytic performance for the production of the alpha,beta-unsaturated aldehyde. The reconstruction of the layered materials (starting from the mixed oxides) caused an increment in the concentration of surface OH- groups, further modifying the selectivity of the reaction.},
  author       = {Hernández Enciso, Willinton Yesid and Aliç, Funda and Verberckmoes, An and Van Der Voort, Pascal},
  issn         = {0022-2461},
  journal      = {JOURNAL OF MATERIALS SCIENCE},
  keywords     = {SURFACE,ACETONE,HALIDES,REHYDRATION,TRANSITION-METAL,ALDEHYDES,ANIONIC CLAYS,MIXED OXIDES,HETEROGENEOUS CATALYSIS,LAYERED DOUBLE HYDROXIDES},
  language     = {eng},
  number       = {1},
  pages        = {628--642},
  title        = {Tuning the acidic-basic properties by Zn-substitution in Mg-Al hydrotalcites as optimal catalysts for the aldol condensation reaction},
  url          = {http://dx.doi.org/10.1007/s10853-016-0360-3},
  volume       = {52},
  year         = {2017},
}
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