State Key Laboratory of Advanced Special Steel & Shanghai Key Laboratory of Advanced Ferrometallurgy & School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China.
Center for Electrochemistry, Department of Chemistry, The University of Texas at Austin, Austin, Texas, 78712, USA.
Sci Rep. 2017 Aug 30;7(1):9978. doi: 10.1038/s41598-017-10587-5.
Silicon carbide nanowires (SiC NWs) have attracted intensive attention in recent years due to their outstanding performances in many applications. A large-scale and facile production of SiC NWs is critical to its successful application. Here, we report a simple method for the production of SiC NWs from inexpensive and abundantly available silica/carbon (SiO/C) precursors in molten calcium chloride. The solid-to-solid electroreduction and dissolution-electrodeposition mechanisms can easily lead to the formation of homogenous SiC NWs. This template/catalyst-free approach greatly simplifies the synthesis procedure compared to conventional methods. This general strategy opens a direct electrochemical route for the conversion of SiO/C into SiC NWs, and may also have implications for the electrosynthesis of other micro/nanostructured metal carbides/composites from metal oxides/carbon precursors.
碳化硅纳米线（SiC NWs）由于其在许多应用中的优异性能，近年来引起了广泛关注。大规模、简便地制备 SiC NWs 对于其成功应用至关重要。在此，我们报告了一种在熔融氯化钙中，利用廉价且丰富的二氧化硅/碳（SiO/C）前体制备 SiC NWs 的简单方法。固-固电还原和溶解-电沉积机制很容易导致均匀的 SiC NWs 的形成。与传统方法相比，这种无模板/催化剂的方法大大简化了合成步骤。与传统方法相比，这种通用策略为从 SiO/C 转化为 SiC NWs 的直接电化学途径开辟了道路，并且可能对从金属氧化物/碳前体制备其他微/纳结构金属碳化物/复合材料的电合成也具有启示意义。
