Thermostimulated molecular alteration in sol–gel derived TiO2:MoO3 composite materials

Thermostimulated molecular alteration in TiO2:MoO3 composite materials, obtained by sol–gel method, were investigated by IR-spectroscopy, Raman spectroscopy, and ESR spectroscopy. Change of the coordination environment of molybdenum atom from tetrahedral to octahedral in 200–450 °C temperature range was revealed. Two groups of molybdenum paramagnetic centers with different saturation character, responsible for oxygen redistribution in the material were detected.