Large‐scale synthesis of ultralong single‐crystalline SiC nanowires
Large‐scale synthesis of ultralong single‐crystalline SiC nanowires
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DOI：
10.1002/pssa.201026288
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
Jianjun Chen;Q. Shi;Linhui Gao;Hongliang Zhu
中科院分区：
文献类型：
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作者：
Jianjun Chen;Q. Shi;Linhui Gao;Hongliang Zhu
以碳质二氧化硅干凝胶为原料，通过简单的无催化剂碳热还原法成功合成了大量棉状超长β-SiC纳米线。纳米线的长度在毫米范围内，纳米线的直径约为130 nm。超长纳米线是竹状单晶β-SiC纳米线。提出了气-固机制来解释纳米线的生长过程，SiC纳米线的大长度和高产率可以归因于SiO和CO气体从碳质SiO2干凝胶中的稳定释放。这种简单的方法为β-SiC纳米线的工业化制备提供了一种很有前途的方法。
A large number of cotton‐like ultralong β‐SiC nanowires (NWs) were successfully synthesized via a simple catalyst‐free carbothermal reduction approach using a carbonaceous silica xerogel as raw materials. The length of the NWs is in the millimeter range and the diameter of the NWs is about 130 nm. The ultralong NWs are bamboo‐like single‐crystalline β‐SiC NWs. A vapor–solid mechanism was proposed to elucidate the growth process of the NWs, and the large length and high‐yield of the SiC NWs may be ascribed to the stable release of SiO and CO gases form the carbonaceous silica xerogel. The simple method provides a promising candidate for industrial fabrication of β‐SiC NWs.