Journal
ELECTRONIC MATERIALS LETTERS
Volume 18, Issue 2, Pages 198-204Publisher
KOREAN INST METALS MATERIALS
DOI: 10.1007/s13391-021-00331-7
Keywords
Electrospinning; Selective oxidation; Selective etching; Porous carbon nanofiber
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Funding
- Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2017M3D1A1040688, 2019R1A2C2090859]
- program of Carbon to X technology development for production of useful substances, through the National Research Foundation of Korea (NRF) - Korean government (Ministry of Science and ICT (MSIT) [2020M3H7A1098376]
- Research Institute of Advanced Materials (RIAM) at Seoul National University
- National Research Foundation of Korea [2019R1A2C2090859] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The design of the material synthesis process is crucial for the synthesis and application of various materials. In this study, selective oxidation and etching were used to fabricate different metal structures on a carbon nanofiber support, resulting in the formation of a porous structure.
The design of the material synthesis process is important because this process can be applied to a variety of materials and used in different applications. Herein, we selectively oxidized two types of metals in a carbon nanofiber (CNF) support and then left only one type of metal on a porous support using selective etching. Ni and MgO were formed in the CNFs through annealing, and then MgO was etched with an HCl etchant. In the selective oxidation process, two types of metal were selected by considering the oxidation tendency between the metal and C. Ni was selected as an oxidant of C, and Mg was selected as a reductant of C. The two metals with significantly different oxidation tendencies were predicted to have different reactivity with the etchant, making them suitable for selective etching. The effectiveness of selective etching was verified by energy-dispersive X-ray spectroscopy (EDS) and transmission electron microscopy (TEM). In EDS, the atomic concentration of Mg was selectively reduced. In TEM, the formation of a porous structure was confirmed. [GRAPHICS] .
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