Synthesis of surface-replicated ultra-thin silica hollow nanofibers using structurally different carbon nanofibers as templates

• Published in: Journal of solid state chemistry 2019-04, Vol.272, p.21-26
• Main Authors: Kim, Taegon, Naoki, Watanabe, Miyawaki, Jin, Park, Joo-Il, Lee, Chanmin, Jung, Hoi-Kyoeng, Jeon, Min-Seok, Kim, Hyun-Jong, Yoon, Seong-Ho
• Format: Article
• Language: English
• Subjects: Carbon nanofiber; Mesoporous ultra-thin silica hollow nanofiber; Template synthesis
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2019.01.025

Ultra-thin silica hollow nanofibers were successfully synthesized using three kinds of well-defined carbon nanofibers (CNFs) with different surface structures as effective templates via pyrolysis of polycarbomethylsilane-coated CNFs. The prepared silica hollow nanofibers replicated the characteristic surface morphologies of the CNFs, such as herringbone, platelet, and tubular types with edge or basal planes. Especially, the unique HCNF template, with tiny fibril aggregates on the surface, was the most effective template material for synthesizing ultra-thin silica hollow nanofibers with uniform and hierarchical meso-pores and high surface areas (over than 680 m2/g). The chemical and physical properties of the silica nanofibers were evaluated with various analytical techniques, such as TGA, HR-TEM, FE-SEM, XRD, XPS, and N2 adsorption/desorption, and discussed in detail. [Display omitted] •Synthesis of ultra-thin silica hollow nanofiber by using template method.•Characteristic surface morphologies replicated from three kinds of well-defined CNFs.•Hierarchical meso-pores and high surface area originated from unique HCNF template.•In-depth structural evaluation for surface-replicated ultra-thin silica hollow nanofibers.