CHEN Ting1,2, XU Yanqiao1, JIANG Wan 2, JIANG Weihui 1,2, LIU Jianmin 2, XIE Zhixiang 1
(1. School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, Jiangxi, China; National Engineering Research Center for Domestic & Building Ceramics, Jingdezhen 333001, Jiangxi, China)
Abstract: Spindle-like zinc oxide was prepared by hydrothermal method using zinc chloride (ZnCl2)and ammonia (NH3 • H2O) as raw materials, surfactant cetyltrimethylammonium bromide (CTAB) as template, respectively.The phases of the resulting products were investigated by differential thermal analysis and thermogravimetric analysis (DTA-TG), and X-ray diffraction (XRD), while the morphologies were characterized by scanning electron microscope (SEM) and transmission electron microscopy (TEM), respectively. The possible explanation for the formation structure and the luminescence property were also presented here. The experimental results showed that the layer structure precipitate was formed at room temperature due to the template effect of surfactant CTAB. After hydrothermal treatment, the resulting product was spindle-like zinc oxide with hexagonal wurtzite structure, grew along [0001] axis. The homogeneity of the resulting products was improved with increased the CTAB concentration. However, too higher concentration caused the formation of ZnO with hexagonal prism structure. Increasing the temperature and reducing the ZnCl2 concentration were favorable to obtain the sample with small particle size and smooth surface, which exhibited approximately about 3 μm in length and 0.5 μm in diameter. The spindle-like ZnO has luminescent properties at room temperature, suggesting that the sample has a few crystal defects.
Key words: Nanomaterials; Zinc oxide; Surfactant; Hydrothermal; Spindle