Impact of silica structure of copper and iron-containing SBA-15 and SBA-16 materials on toluene oxidation

A. Szegedi, Margarita Popova, K. Lázár, Szilvia Klébert, Eszter Drotár

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Copper and iron modified SBA-15 and SBA-16 materials were prepared by incipient wetness impregnation technique and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 physisorption, temperature-programmed reduction (TPR-TGA), UV-Vis diffuse reflectance and Mössbauer spectroscopy. Formation of finely dispersed copper and iron-oxide species was observed on both supports, whereas copper ferrite could be evidenced only on SBA-15. It was found that the structural and surface properties of the mesoporous supports determine the type of formed metal oxides, their dispersion, reducibility and the catalytic activity in total oxidation of toluene. On SBA-16 support penetration of metal salt into the bimodal channel system is hindered therefore separate copper- and iron-oxide phases are formed on the outer surface of catalysts. The catalytic activity and stability are lower due to the easier agglomeration of particles. On SBA-15 support finely dispersed metal-oxides can be found in the mesoporous channels. Their interaction is favored to form bimetallic phases enhancing the catalytic activity and stability in total oxidation of toluene.

Original languageEnglish
Pages (from-to)97-104
Number of pages8
JournalMicroporous and Mesoporous Materials
Volume177
DOIs
Publication statusPublished - 2013

Fingerprint

Toluene
Silicon Dioxide
toluene
Copper
Catalyst activity
Iron
Copper oxides
Metals
Silica
silicon dioxide
Iron oxides
catalytic activity
iron
copper
Oxidation
Oxides
oxidation
copper oxides
iron oxides
metal oxides

Keywords

  • Copper
  • Iron
  • SBA-15
  • SBA-16
  • VOC oxidation

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Impact of silica structure of copper and iron-containing SBA-15 and SBA-16 materials on toluene oxidation. / Szegedi, A.; Popova, Margarita; Lázár, K.; Klébert, Szilvia; Drotár, Eszter.

In: Microporous and Mesoporous Materials, Vol. 177, 2013, p. 97-104.

Research output: Contribution to journalArticle

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AU - Klébert, Szilvia

AU - Drotár, Eszter

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AB - Copper and iron modified SBA-15 and SBA-16 materials were prepared by incipient wetness impregnation technique and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 physisorption, temperature-programmed reduction (TPR-TGA), UV-Vis diffuse reflectance and Mössbauer spectroscopy. Formation of finely dispersed copper and iron-oxide species was observed on both supports, whereas copper ferrite could be evidenced only on SBA-15. It was found that the structural and surface properties of the mesoporous supports determine the type of formed metal oxides, their dispersion, reducibility and the catalytic activity in total oxidation of toluene. On SBA-16 support penetration of metal salt into the bimodal channel system is hindered therefore separate copper- and iron-oxide phases are formed on the outer surface of catalysts. The catalytic activity and stability are lower due to the easier agglomeration of particles. On SBA-15 support finely dispersed metal-oxides can be found in the mesoporous channels. Their interaction is favored to form bimetallic phases enhancing the catalytic activity and stability in total oxidation of toluene.

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