Abstract
Pure and mixed ZnO and SiO2 particles were made by flame spray pyrolysis (FSP). Gas phase reaction took place when using hexamethyldisiloxane (HMDSO) as Si precursor, forming nanoparticles, whereas the SiO2 sol used as Si precursor was not evaporated in the flame, creating spherical aggregates of the sol particles (e.g. 1 μm). The FSP of zinc acetate (ZA) produced ZnO nanoparticles. The FSP of HMDSO and ZA led to intimate gas phase mixing of Zn and Si, suppressing each other's particle growth, forming nanoparticles. Nucleation of ZnO and SiO2 occurred independently by FSP of the SiO2 sol and ZA, resulting a ZnO and SiO2 mixture.
