Mesoporous Ti-MCM-41 materials as photodegradation catalysts of 2,4,6-trichlorophenol in water

Agnes Szegedi, Ahmed K. Aboul-Gheit, Sohair M. Abdel-Hamid, Sawsan A. Mahmoud, Radwa A. El-Salamony, József Valyon, Magdolna R. Mihályi

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18 Citations (Scopus)

Abstract

Titanium-modified MCM-41 type mesoporous silica materials were prepared by hydrothermal [Ti-MCM-41(HT)], sol-gel [Ti-MCM-41(SG)] and post-synthesis impregnation [TiO2/MCM-41] methods. The materials were characterized and tested as photocatalysts in the oxidative degradation reaction of 2,4,6-trichlorophenol (2,4,6-TCP) in water. The catalysts showed high initial activity. The produced acetate and chloride ions were found to inhibit the degradation reaction. The Ti-MCM-41(HT) sample showed higher overall activity than the Ti-MCM-41(SG) catalyst. One of the probable reasons for this is the difference in the distribution of the active sites that determines the rates of electron (e-)-hole (h+) recombination within the photoactive species. The HT preparation was found to contain silica-bound titania in higher dispersion, while the SG preparation contained also polymerized species with Ti-O-Ti bonds.

Original languageEnglish
Pages (from-to)3319-3329
Number of pages11
JournalJournal of Materials Science
Volume46
Issue number10
DOIs
Publication statusPublished - May 1 2011

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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    Szegedi, A., Aboul-Gheit, A. K., Abdel-Hamid, S. M., Mahmoud, S. A., El-Salamony, R. A., Valyon, J., & Mihályi, M. R. (2011). Mesoporous Ti-MCM-41 materials as photodegradation catalysts of 2,4,6-trichlorophenol in water. Journal of Materials Science, 46(10), 3319-3329. https://doi.org/10.1007/s10853-010-5219-4