Sol-gel copper-magnesia-silica mixed oxides

T. Lopez, M. E. Manríquez, R. Gomez, A. Campero, M. E. Llanos

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Sol-gel magnesia-silica mixed oxides were prepared with tetraethoxysilane (TEOS) and magnesium ethoxide as molecular precursors. While still at the fluid phase before gelation, a solution of copper acetylacetonate was added. After gelation, the solids thus obtained were sulfated in two ways: by conventional impregnation and by an in situ impregnation with H2SO4. The solids were characterized by TPD (NH3 and CO2). The solids impregnated in situ, containing 4.0 and 6.7 mol% of MgO show a high acidity. The mixed oxides showed high specific surface area values when the gelation is carried out at pH 3; however, at pH 9, areas three times smaller were obtained. Their catalytic activity was studied using the decomposition of 2-propanol as a test reaction.
Original languageAmerican English
Pages (from-to)21-29
Number of pages18
JournalMaterials Letters
DOIs
StatePublished - 1 Jan 2000
Externally publishedYes

Fingerprint

Magnesium Oxide
Magnesia
gelation
mixed oxides
Gelation
Silicon Dioxide
Oxides
Sol-gels
Copper
Silica
gels
silicon dioxide
Impregnation
copper
2-Propanol
silica gel
Propanol
Temperature programmed desorption
Acidity
acidity

Cite this

Lopez, T. ; Manríquez, M. E. ; Gomez, R. ; Campero, A. ; Llanos, M. E. / Sol-gel copper-magnesia-silica mixed oxides. In: Materials Letters. 2000 ; pp. 21-29.
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Sol-gel copper-magnesia-silica mixed oxides. / Lopez, T.; Manríquez, M. E.; Gomez, R.; Campero, A.; Llanos, M. E.

In: Materials Letters, 01.01.2000, p. 21-29.

Research output: Contribution to journalArticle

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T1 - Sol-gel copper-magnesia-silica mixed oxides

AU - Lopez, T.

AU - Manríquez, M. E.

AU - Gomez, R.

AU - Campero, A.

AU - Llanos, M. E.

PY - 2000/1/1

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