Low-Temperature Pseudomorphic Transformation of Ordered Hierarchical Macro-mesoporous SiO2/C Nanocomposite to SiC via Magnesiothermic Reduction

被引：122

作者：

Shi, Yifeng ^{[2
]}

Zhang, Fan ^{[2
]}

Hu, Yong-Sheng ^{[1
]}

Sun, Xiaohong ^{[2
]}

Zhang, Yichi ^{[2
]}

Lee, Hyung Ik ^{[2
]}

Chen, Liquan ^{[1
]}

Stucky, Galen D. ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 16期

基金：

美国国家科学基金会;

关键词：

HIGH-SURFACE-AREA; SILICON-CARBIDE; CARBOTHERMAL REDUCTION; CARBON; CERAMICS; POWDER; FABRICATION; STABILITY;

D O I：

10.1021/ja1001136

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A magnesiothermic reduction synthesis approach is reported for direct conversion of SiO2/C composite nanostructures to corresponding SiC materials without losing their nanostructure morphologies. Crystalline SiC materials can be obtained by this approach at a temperature as low as 600 degrees C, only approximately half of that applied in the generally used carbothermal reduction and preceramic polymer pyrolysis methods. An ordered hierarchical macro-mesoporous SiC material was synthesized for the first time as a demonstration. This pseudomorphic transformation can be regarded as a general synthesis method for different kinds of SiC nanostructures, and it can also be readily extended to other metal carbide materials as well as TiC.

引用

页码：5552 / +

页数：4

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