Flame aerosol synthesis of nanostructured materials
Flame aerosol synthesis (FAS), including flame spray pyrolysis (FSP), is a versatile, scalable and economical technology for producing well-controlled nanostructured materials, including single metal-oxide, mixed-oxide nanocomposite, and carbon nanostructures. It has also been recognized as a robust fabrication method of nanodevices. K-INN Tech developed a liquid-fed (water based) continuous flame reactor where appropriate precursors are made to react at high temperature, with controlled residence time, in a flame. The high local temperature supports the formation of homogeneous and highly crystalline nanoparticles, favouring the particle growth by sintering and coalescence, while the large thermal gradient and short residence time preserve the nanoscale feature of the particles.
We validated our set-up for the synthesis of several perovskites (general formula ABO3), such as cobaltates, manganites, ferrites, doped in either A and B site, catalytically active towards CO oxidation, VOC oxidation, NOx reduction. Perovskites are complex oxides with largely tuneable composition allowing to design a specific reactivity. They are promising replacements for Critical Raw Materials in a wide spectrum of applications, from catalysis (i.e. TWC, FWC) to sensors, solid oxides fuels cells and electrolysers.