M. Chatterjee et al., SYNTHESIS, CHARACTERIZATION AND CATALYTIC PROPERTIES OF 2 NOVEL VANADO-ALUMINOSILICATES WITH EU-1 AND ZSM-22 STRUCTURES, Catalysis letters, 35(3-4), 1995, pp. 313-326
The synthesis in the presence of alkali ions of two novel vanadium con
taining zeolites V-Al-EU-1 and V-Al-ZSM-22 is reported. Both V4+- and
V5+-ions are present in as-synthesized samples. Cyclic voltammograms o
f the samples reveal the presence of two types of V5+ in the calcined
samples. A weak shoulder at similar to 980 cm(-1) is observed in the I
R spectra of the calcined samples. On extraction with acid a sharp ban
d appears at similar to 960 cm(-1). The acid washed samples are more a
ctive in the hydroxylation of phenol and the oxidation of toluene (wit
h H2O2) than the calcined samples.