Synthesis of nanopolycrystalline mesoporous diamond from periodic mesoporous carbon: Mesoporosity increases with increasing synthesis pressure

Journal Article · Fri Mar 01 00:00:00 EST 2019 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2018.10.024· OSTI ID:1566478

Najiba, Shah; Juhl, Stephen J.; Mandal, Manik; Liu, Cong; Durygin, Andriy; Chen, Jiuhua; Fei, Yingwei; Alem, Nasim; Landskron, Kai

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 m ² g ^-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.

• Research Organization: Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree); Carnegie Inst. of Washington, Washington, DC (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• DOE Contract Number: SC0001057
• OSTI ID: 1566478
• Journal Information: Scripta Materialia, Vol. 162, Issue C; ISSN 1359-6462
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

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