Yoo, Seung Hwa Joh, Han-Ik Lee, Sungho 2024-01-20T01:33:47Z 2024-01-20T01:33:47Z 2021-09-01 2017-04-30 0169-4332 https://pubs.kist.re.kr/handle/201004/122828 Porous carbon nanofibers (PCNFs) with CNF branches (PCNF/bCNF) were synthesized by a simple heat treatment method. Conventional methods to synthesize this unique structure usually follow a typical route, which consists of CNF preparation, catalyst deposition, and secondary CNF growth. In contrast, our method utilized a one-step carbonization process of polymer nanofibers, which were electrospun from a one-pot solution consisted of polyacrylonitrile, polystyrene (PS), and iron acetylacetonate. Various structures of PCNF/CNF were synthesized by changing the solution composition and molecular weight of PS. It was verified that the content and molecular weight of PS were critical for the growth of catalyst particles and subsequent growth of CNF branches. The morphology, phase of catalyst, and carbon structure of PCNF/bCNF were analyzed at different temperature steps during carbonization. It was found that pores were generated by the evaporation of PS and the catalyst particles were formed on the surface of PCNF at 700 degrees C. The gases originated from the evaporation of PS acted as a carbon source for the growth of CNF branches that started at 900 degrees C. Finally, when the carbonization process was finished at 1200 degrees C, uniform and abundant CNF branches were formed on the surface of PCNF. (C) 2017 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV STRUCTURED CARBON CATALYTIC GROWTH FIBER NANOPARTICLES NANOTUBES Synthesis of porous carbon nanofiber with bamboo-like carbon nanofiber branches by one-step carbonization process Article 10.1016/j.apsusc.2017.01.154 1 APPLIED SURFACE SCIENCE, v.402, pp.456 - 462 APPLIED SURFACE SCIENCE 402 456 462 scie scopus 000395213900058 2-s2.0-85010011121 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article STRUCTURED CARBON CATALYTIC GROWTH FIBER NANOPARTICLES NANOTUBES Electrospinning Catalyst Carbon nanofiber Carbonization