Facile Synthesis of Waxberry-Like ZnO Nanospheres for High Performance Photocatalysis
Facile Synthesis of Waxberry-Like ZnO Nanospheres for High Performance Photocatalysis
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轻松合成杨梅状 ZnO 纳米球以实现高性能光催化
DOI：
10.1166/sam.2013.1620
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发表时间：
2013-11
影响因子：
0.9
通讯作者：
舒康颖
中科院分区：
文献类型：
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作者：
舒康颖
以乙酸酯为前驱体，在160℃的二甘醇（DEG）介质中回流制备了杨梅状氧化锌纳米球。采用透射电镜（TEM）、场发射扫描电镜（FESEM）、x射线衍射（XRD）和傅里叶变换红外光谱（FTIR）对制备的ZnO纳米球进行了表征。实验结果表明，所得产物呈杨梅状球形结构，平均尺寸为200±50 nm，由众多具有六方纤锌矿结构的纳米晶体组成。在此基础上，探讨了杨梅状ZnO纳米球的生长机理。此外，光催化测试表明，制备的杨梅状ZnO纳米球比制备的ZnO纳米球和商用P25 TiO2纳米球具有更高的光催化活性。该研究为开发新型半导体纳米结构作为高性能光催化剂提供了一种简便、低成本的方法，在太阳能转换、光催化、传感等领域具有广阔的应用前景。
The waxberry-like ZnO nanospheres were successfully synthesized via a facile solution route by refluxing their acetate precursors in diethylene glycol (DEG) medium at 160 °C. The as-prepared ZnO nanospheres were characterized by transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Experimental results demonstrated that the resultant products showed waxberry-like spherical architecture with an average size of 200 ± 50 nm, which was composed of numerous nanocrystals with hexagonal wurtzite structure. On the basis of these materials information, the growth mechanism of waxberry-like ZnO nanospheres was also discussed. Furthermore, the photocatalytic measurement demonstrated that the as-prepared waxberry-like ZnO nanospheres showed higher photocatalytic activities than the as-prepared ZnO nanoparticles and commercial P25 TiO2 nanoparticles. It is expected that this work could provide a facile and low-cost method for the development of novel semiconductor nanostructures as high performance photocatalysts with promising applications in solar energy conversion, photocatalysis, sensing, and so on.