Sonochemically assisted synthesis of hollow spheres and lozenge-shape hollow prism ZnO nanostructure in acidic ionic liquids

Nanosheet-based microspheres of ZnO with hierarchical structures and lozenge-shape hollow prism were successfully prepared by ultrasonic irradiation in acidic ionic liquids (AILs). It is found that the ultrasonic irraditation time and the AILS both influence the growth mechanism and optical properties of ZnO nanostructures. The sonication time affects the evolution of the morphology of the hollow spheres. When the sonication time increases, the thickness of the sheets making the hollow sphere is reduced. Producing Zno nanostructures by different traditional methods (for example hydrothermal method) require base media. This method is not economical in many industrial processes and environmentally friendly. In so doing, a critical problem has been the point that, normally, a high concentration of base causes reactor metal corrosion. To alleviate this problem, this study has made use of very low amount of special AIL for the first time. By changing the type of AIL, optical properties of ZnO nanostucture are manageable. Also, importantly, the structures synthesized in this experiment can indicate a new way to construct nanodevices by self organization in one step.

کلیدواژه ها:

Ionic liquid ، X-ray diffraction ، sonochemical method ، nanostructured materials ، oxide materials