(70l) Flame Synthesis of Moo3 Particles
AIChE Spring Meeting and Global Congress on Process Safety
2006
2006 Spring Meeting & 2nd Global Congress on Process Safety
Fifth World Congress on Particle Technology
Poster Session: World Congress
Monday, April 24, 2006 - 4:30pm to 8:30pm
Molybdenum trioxide is a well known heterogeneous catalyst and is used in many additional applications from secondary lithium batteries to large area display devices. Chemical sensors have also been demonstrated using MoO3 to detect ammonia. Molybdenum trioxide particles were synthesized using the flame spray pyrolysis (FSP) method. The nanopowders were characterized with X-ray diffraction (XRD), nitrogen adsorption specific surface area (BET), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Raman spectroscopy. The produced particles crystallized with a plate-like morphology and consisted of α- or β-MoO3. A flame condition was found, where a further crystallization and crystal growth took place on a post-flame filtering surface and resulted in very large, plate-like and uniformly crystallized α-MoO3 particles. The thermal annealing and phase transformation leading to these structures was confirmed by a post-synthesis thermal treatment of as-produced powders at 500°C for 4 hours.