An ultrasonic nozzle assisted spray pyrolysis method was developed to generate novel architectures of several mixed metal oxide nanocomposites. Highly porous foams of magnesia-yttria, magnesium ferrite spinels and similar nanomaterials were produced in the form of fine-scale rings (< 100 �m). The cell walls of the rings are comprised of membrane-like morphologies with nanoscale oxide-oxide phase domains measuring less than 50 nm in size. The nanomaterials were characterized using X-ray diffraction, field emission scanning electron microscopy, transmission electron microcopy, Fourier transform infrared spectroscopy, nitrogen adsorption analysis, and thermogravimetric analysis. Specific advantages of this method are process generality, ease of processing, ability to generate nanoscale phase domains of mixed metal oxides, good homogeneity in the distribution of oxide phases, and unique morphology. Such nanomaterials with highly porous architectures and mixed oxide character have widespread applications in catalysis, optics, gas sensors, electrochemistry, photoreactions, and as magnetic materials.

Ultrasonic nozzle assisted spray pyrolysis preparation of mixed metal oxide nanocomposites

243rd National Meeting (2012)

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