Needle-like ZnO nanostructure synthesized by organic-free hydrothermal process

In present work, needle-like ZnO nanostructures were synthesized by an organic-free hydrothermal process. The hydrothermal synthesis was performed at temperature 330 K. The products were characterized by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). The XRD pattern indicated that the needle-like ZnO nanostructures were hexagonal. Morphology, diameter and length of needles were investigated. Finally, the mechanism for organic-free hydrothermal synthesis of the needle-like ZnO nanostructure is discussed.