Large-scale synthesis of β-SiC nanowires by using mesoporous silica embedded with Fe nanoparticles
Large-scale synthesis of β-SiC nanowires by using mesoporous silica embedded with Fe nanoparticles
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DOI：
10.1016/s0009-2614(00)01023-x
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发表时间：
2000-10-20
影响因子：
2.8
通讯作者：
Cui, Z
中科院分区：
文献类型：
--
作者：
Liang, CH;Meng, GW;Cui, Z
利用活性炭和溶胶-凝胶衍生二氧化硅的混合物，嵌入铁纳米颗粒，开发了一种新的方法来生产大量的β -SiC纳米线。通过x射线衍射、透射电子显微镜、能量分散x射线和高分辨率透射电子显微镜的详细研究证实，纳米线由直径10-30 nm的单晶核心和非晶氧化硅层包裹组成，长度可达几十微米。β -SiC纳米线的形成过程包括碳热还原和气液固生长过程。在室温下观察到两个位于340和440 nm左右的宽光致发光峰。(C) 2000 Elsevier Science B.V.版权所有
A novel method has been developed to produce bulk quantities of beta -SiC nanowires from the mixture of activated carbon and sol-gel derived silica embedded with Fe nanoparticles. Detailed investigation with X-ray diffraction, transmission electron microscopy, energy-dispersed X-ray and high-resolution transmission electron microscopy confirm that the nanowires consist of a 10-30 nm diameter single crystalline core wrapped with an amorphous silicon oxide layer, and have length up to several tens of micrometers. The formation process of beta -SiC nanowires involves carbothermal reduction and a vapor-liquid-solid growth process. Two broad photoluminescence peaks located around 340 and 440 nm were observed at room temperature. (C) 2000 Elsevier Science B.V. All rights reserved.