State key laboratory of optoelectronic materials and technologies, School of Physics Science and Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou 510275 (People's Republic of China).
Chemphyschem. 2014 Feb 3;15(2):374-81. doi: 10.1002/cphc.201300783. Epub 2013 Dec 27.
A simple one-step direct templating method is developed to synthesize hollow carbon and sandwich-like ZnO/C/ZnO micro/nanospheres. The type and shell thickness of the final products can be controlled by simply adjusting the reaction temperature. The removal of the templates can also be easily controlled during the synthesis. At a low temperature, the templates remain in the products to form hollow sandwich-like micro/nanospheres. As the reaction temperature rises, the templates are consumed, which results in the preparation of hollow carbon micro/nanospheres. On the basis of a series of experiments, we propose a simple plausible mechanism to address the original strategy for synthesizing these hollow micro/nanospheres. Furthermore, the sandwich-like ZnO/C/ZnO nanospheres can be used as the anode in lithium-ion batteries, exhibiting an extraordinary cyclability and a high coulombic efficiency. This approach can be extended to the synthesis of other hollow spheres. Further investigation is underway in our group.
一种简单的一步直接模板法被开发用于合成中空碳和夹层状 ZnO/C/ZnO 微/纳米球。通过简单地调整反应温度，可以控制最终产物的类型和壳层厚度。在合成过程中，模板的去除也可以很容易地控制。在低温下，模板保留在产物中以形成中空夹层状微/纳米球。随着反应温度的升高，模板被消耗，从而制备出中空碳微/纳米球。基于一系列实验，我们提出了一个简单的合理机制来解释最初的合成这些中空微/纳米球的策略。此外，夹层状 ZnO/C/ZnO 纳米球可用作锂离子电池的阳极，表现出非凡的循环稳定性和高库仑效率。这种方法可以扩展到其他中空球体的合成。我们小组正在进一步研究。
