Synthesis and characterization of Ba/MCM-41

Kaya E., Oktar N., KARAKAŞ G., Murtezaoglu K.

TURKISH JOURNAL OF CHEMISTRY, vol.34, no.6, pp.935-943, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 6
  • Publication Date: 2010
  • Doi Number: 10.3906/kim-1003-2
  • Journal Name: TURKISH JOURNAL OF CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.935-943
  • Keywords: MCM-41, Ba, hydrothermal synthesis, MESOPOROUS MOLECULAR-SIEVES, CATALYTIC-REDUCTION, BARIUM-TITANATE, NITROGEN-OXIDES, MCM-41, OXIDATION, NO, CU, ADSORPTION, STORAGE
  • Middle East Technical University Affiliated: Yes

Abstract

Mesoporous Ba/MCM-41 type materials (Ba/MCM-41) with high Ba/Si molar ratios between 0.025 and 0.1 were synthesized by direct hydrothermal synthesis. The samples were characterized by XRD, nitrogen adsorption, TGA-DTA, FTIR, SEM-EDS, and TEM techniques. BET surface areas of samples with various Ba loadings were found between 722 and 931 m(2)/g with 28 A average pore size, which is consistent with the pore size of 30 A for pure MCM-41 samples synthesized by the same procedure. The crystal structures of synthesized MCM-41 and Ba/MCM-41 were confirmed by XRD analysis. Among the investigated Ba/MCM-41 samples, the formation of barium oxide and barium nitrate species besides silicates was also observed in the high angle region XRD patterns.