Preparation of non-spherical hollow carbon nanocapsules from nickel nanoprecursors |
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| Affiliation: | 1. Department of Materials Science and Engineering, National Chung Hsing University, Taichung 402, Taiwan;2. Nanomaterials Laboratory, Department of Materials Science and Engineering, Far East University, Hsing-Shih, Tainan 74448, Taiwan;1. Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL 32816, USA;2. Institute for Problems of Materials Science, 3 Krzhizhanivskii Str., Kyiv 03142, Ukraine;3. Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for High Performance Ceramics, CH-8600 Dubendorf, Switzerland;4. Laboratory of Mechanical Metallurgy, EPFL, CH-1015 Lausanne, Switzerland;5. Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA;6. Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA;7. Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;1. Physics Department, Kamil Ozdag Science Faculty, Karamanoglu Mehmetbey University, 70100, Karaman, Turkey;2. Physics Department, Science and Literature Faculty, Balikesir University, 10145 Balikesir, Turkey;3. Research Centre of Applied Sciences, Balikesir University, 10145, Balikesir, Turkey;1. School of Electronic Information Engineering, Xijing University, Xi''an 710123, China;2. The State Key Lab of Mechanical Transmissions, Chongqing University, Chongqing 400044, China;1. Energy Material Group, Lotte Chemical, 115, Gajeongbuk-ro, Yuseong-gu, Daejeon, 305-726, Korea;2. Department of Chemistry Education, Chonnam National University, Gwangju 500-757, S. Korea;3. Department of Nano Science and Technology, Graduate School of Convergence Science and Technology, Seoul National University, Suwon, 443-270, S. Korea;4. School of Chemical and Biological Engineering, Seoul National University, Seoul, 151-744, S. Korea;5. Advanced Institutes of Convergence Technology, Seoul National University, Suwon, 443-270, S. Korea;1. Electronic Materials & Component Center, Korea Institute of Ceramic Engineering & Technology, Jinju 52851, South Korea;2. Department of Materials Engineering, Kyonggi University, Suwon 16227, South Korea |
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| Abstract: | Hollow carbon nanocapsules (NCs) are prepared from nickel nanoplate precursors through carburizing, decomposition, and leaching steps. The carburizing step was carried out by heating the nickel nanoplates in oleylamine at 250 °C for 4 h. Decomposition was then performed in a nitrogen atmosphere at 530 °C for 3 min. Characterization of the resulting product of the first two steps shows the intermediates to be Ni3C/Ni–C alloy and Ni/C core–shell nanostructures. Hollow carbon NCs are recovered from the products by leaching the Ni/C core–shell nanostructures in concentrated nitric acid. The NCs are found to have a high specific surface area (1081 m2 g−1) and a mesoporous structure (i.e., a pore volume of 2.81 cm3/g and a narrow pore size distribution of 2.9–3.4 nm). In addition, it is found that the hollow carbon NCs retained the same morphology as the original nickel precursors; demonstrating the robustness of the nickel templates and the ability of the carbon shells to maintain a non-spherical shape. |
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