SYNTHESIS OF SHUTTLE-LIKE ZINC OXIDE NANOPARTICLES BY MICROWAVE HEATING

摘要

Shuttle-like ZnO nanoparticles were synthesised for the first time by hydrolysis of zinc acetate dihydrate in the presence of polyvinylpyrrolidone (PVP) by microwave heating. The as-prepared ZnO nanoparticles were characterised by transmission electron microscopy(TEM) and X-ray powder diffraction(XRD). The factors affecting the morphology of ZnO nanoparticles were investigated. Due to the rapid and homogeneous heating with microwave, the morphology of the as-synthesised ZnO nanoparticles changed slightly with the increasing concentration of zinc salt. An appropriate amount of PVP is necessary for the formation of well-defined and uniform ZnO. It is worth noting that there is significant difference between preparing zinc oxide nanoparticles by microwave heating and water-bath heating. Microwave heating appears to be particularly effective as a means of accelerating the reaction among the raw materials and leading to the growth and crystallisation of ZnO.