Synthesis of ordered mesoporous ZrC/C nanocomposite via magnesiothermic reduction at low temperature

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• 作者：Zhihong Ji ; Li Ye ; Xueyu Tao ; Hao Li ; Wenfeng Qiu ; Tao Cai ; Yanbin Jiang ; Tong Zhao ; ^{tzhao@iccas.ac.cn}
• 关键词：Magnesiothermic reduction ; Ordered ; Mesoporous ; Nanocomposites ; Oxidation
• 刊名：Materials Letters
• 出版年：2012
• 出版时间：15 March 2012
• 年：2012
• 卷：71
• 期：Complete
• 页码：88-90
• 全文大小：437 K

文摘

Using phenolic resoles and zirconium citrate as carbon and zirconium precursors, respectively, and triblock PEO-PPO-PEO copolymers of Pluronic F127 as templates, followed by carbonization under Ar atmosphere, ordered mesoporous ZrO₂/C nanocomposite has been successfully fabricated. After magnesiothermic reduction at rather low temperature (700 ¡ãC), ZrC/C nanocomposite with high surface area (344 m²/g) and narrow pore-size distribution was obtained. Thermogravimetric measurements under air show that the collapse temperature improved from 400 ¡ãC to 480 ¡ãC for the ZrO₂/C sample and the ZrC/C sample, which illustrates that the presence of reductive ZrC nanocystals can greatly enhance the oxidation resistance ability of carbon frameworks and prevent collapse.