Ag-modified H-Beta, H-MCM-41 and SiO2: Influence of support, acidity and Ag content in ozone decomposition at ambient temperature

N. Kumar*, P. Konova, A. Naydenov, T. Salmi, D. Yu Murzin, T. Heikillä, V. P. Lehto

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)

Abstract

Silver-modified H-MCM-41-50, H-Beta-11 and SiO2 catalysts were synthesized by incipient wet impregnation method using aqueous solution of silver nitrate. The catalysts were characterized using X-ray powder diffraction, scanning electron microscope, X-ray fluorescence, nitrogen physisorption and FTIR spectroscopy. The catalysts were tested in the heterogeneous catalytic decomposition of ozone at ambient temperature. The highest degree of ozone decomposition was observed over the mild acidic 5 wt.% Ag-H-MCM-41-50 (98%) mesoporous molecular sieve catalyst followed by 5 wt.% Ag-SiO2 (90%). It was found that the most acidic catalyst 5 wt.% Ag-H-Beta-11 showed the lowest ozone decomposition. The content of Ag was also observed to influence the ozone decomposition. The 5 wt.% Ag-H-MCM-41-50 mesoporous molecular sieve catalyst exhibited higher catalytic activity than 2 wt.% Ag-H-MCM-41-50. The acidic properties, structure of catalyst supports and the metal content were found to be important for the ozone decomposition reaction.

Original languageEnglish
Pages (from-to)342-346
Number of pages5
JournalCatalysis Today
Volume119
Issue number1-4
DOIs
Publication statusPublished - 15 Jan 2007
MoE publication typeA1 Journal article-refereed

Keywords

  • MCM-41
  • Mesoporous materials
  • Ozone decomposition
  • Silver
  • Zeolite

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