Synthesis of nanopolycrystalline mesoporous diamond from periodic mesoporous carbon: Mesoporosity increases with increasing synthesis pressure
Synthesis of nanopolycrystalline mesoporous diamond from periodic mesoporous carbon: Mesoporosity increases with increasing synthesis pressure
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DOI：
10.1016/j.scriptamat.2018.10.024
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发表时间：
2019-03
影响因子：
6
通讯作者：
Shah Najiba;Stephen J. Juhl;Manik Mandal;Cong Liu;A. Durygin;Jiuhua Chen;Y. Fei;N. Alem;K. Landskron
中科院分区：
文献类型：
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作者：
Shah Najiba;Stephen J. Juhl;Manik Mandal;Cong Liu;A. Durygin;Jiuhua Chen;Y. Fei;N. Alem;K. Landskron
我们报道了在15和21 GPa之间的压力和1300 °C的温度下从周期性介孔碳无催化剂合成整体介孔纳米多晶金刚石。我们研究了压力依赖性的孔隙度与三维电子断层扫描。我们已经观察到，在15、18和21 GPa下生产的材料的表面积从56增加到90，138 m2 g −1，孔隙率从10，24增加到33%。在较高压力下增加的孔隙率可能是由于在较高压力下金刚石的成核较早开始。
We report the catalyst-free synthesis of monolithic mesoporous nanopolycrystalline diamond from periodic mesoporous carbon at pressures between 15 and 21 GPa and a temperature of 1300 °C. We investigated the pressure-dependence of the porosity with 3-dimensional electron tomography. We have observed that surface areas increase from 56 to 90, 138 m2g−1, and porosities increase from 10, 24, to 33% for materials produced at 15, 18, and 21 GPa, respectively. The increased porosity at higher pressure may be due to the earlier onset of the nucleation of diamond at higher pressure.