利用声化学法制备空心 ZnO 微球。

Using sonochemistry for the fabrication of hollow ZnO microspheres.

机构信息

State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, China.

出版信息

Ultrason Sonochem. 2010 Feb;17(2):284-7. doi: 10.1016/j.ultsonch.2009.09.010. Epub 2009 Sep 26.

DOI:10.1016/j.ultsonch.2009.09.010

PMID:19853492

Abstract

Hollow ZnO microspheres assembled by nanoparticles have been prepared by a sonochemical synthesis at room temperature using carbon spheres as template. The growth process of the precursor was investigated. The prepared hollow spheres were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM). The diameter of the obtained hollow spheres is about 500nm, and the walls are composed of numerous ZnO aggregate nanocrystallines with diameters of 90nm. A possible growth mechanism for the formation of ZnO microspheres has been proposed, in which carbon spheres play a crucial role in the formation of the wurtzite hollow ZnO microspheres. The specific structure of the hollow spheres may find applications in nanoelectronics, nanophotonics and nanomedicine.

摘要

采用超声化学法，在室温条件下以碳球为模板合成了由纳米颗粒组装而成的氧化锌中空微球。研究了前驱体的生长过程。采用 X 射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）和高分辨率透射电子显微镜（HRTEM）对所制备的中空球进行了表征。得到的中空球的直径约为 500nm，壁由直径为 90nm 的许多 ZnO 聚集体纳米晶组成。提出了一种形成 ZnO 微球的可能生长机制，其中碳球在形成纤锌矿中空 ZnO 微球中起着至关重要的作用。中空球的特殊结构可能在纳米电子学、纳米光子学和纳米医学中有应用。