Abstract
The B and N co-doped porous carbon (BN carbon) with excellent thermal oxidation resistance has been prepared through annealing covalent organic frameworks. The temperature at 10 wt%, 50 wt% weight loss and the maximum weight loss rate of BN carbon under air increase by 160, 302 and 189 °C, respectively. The mechanism for enhanced thermal oxidation resistance of BN carbon has also been investigated. The BN carbon with the suitable graphitization and oxidation degree, the high content of B atom and the low content of N atom shows the good thermal oxidation resistance. Besides, the B bonds including BC3, BC2O and B2O3 and N bonds including Prrolic-N, Graphitic-N show the good blocking effect on the active sites on carbon, leading to enhanced thermal oxidation resistance.
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