Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 16, Pages 5552-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja1001136
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Funding
- Department of Energy-funded Center on Energy Efficient Materials (CEEM) at UCSB [DE-SC0001009]
- National Science Foundation [DMR-0805148, DMR05-20415]
- Lawrence Livermore National Laboratory [B579837]
- Chinese Academy of Sciences
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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.
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