Structural Study of Polyacrylonitrile-Based Carbon Nanofibers for Understanding Gas Adsorption | Zendy

Junbeom Park | Zendy; Ansgar Kretzschmar | Zendy; Victor Selmert | Zendy; Osmane Camara | Zendy; Hans Kungl | Zendy; Hermann Tempel | Zendy; Shibabrata Basak | Zendy; RüdigerA. Eichel | Zendy

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Structural Study of Polyacrylonitrile-Based Carbon Nanofibers for Understanding Gas Adsorption

Author(s) -

Junbeom Park,

Ansgar Kretzschmar,

Victor Selmert,

Osmane Camara,

Hans Kungl,

Hermann Tempel,

Shibabrata Basak,

RüdigerA. Eichel

Publication year - 2021

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.1c13541

Subject(s) - polyacrylonitrile , materials science , carbonization , adsorption , carbon nanofiber , stack (abstract data type) , carbon fibers , chemical engineering , nanotechnology , superstructure , nanofiber , composite material , polymer , carbon nanotube , organic chemistry , chemistry , computer science , scanning electron microscope , oceanography , geology , composite number , engineering , programming language

Polyacrylonitrile-based carbon nanofibers (PAN-based CNFs) have great potential to be used for carbon dioxide (CO 2 ) capture due to their excellent CO 2 adsorption properties. The porous structure of PAN-based CNFs originates from their turbostratic structure, which is composed of numerous disordered stacks of graphitic layers. During the carbonization process, the internal structure is arranged toward the ordered graphitic structure, which significantly influences the gas adsorption properties of PAN-based CNFs. However, the relation between structural transformation and CO 2 capture is still not clear enough to tune the PAN-based CNFs. In this paper, we show that, with increasing carbonization temperature, the arrangement of the PAN-based CNF's structure along the stack and lateral directions takes place independently: gradually aligning and merging along the stack direction and enlarging along the lateral direction. Further, we correlate the structural arrangement and the CO 2 adsorption properties of the PAN-based CNFs to propose a comprehensive structural mechanism. This mechanism provides the knowledge to understand and tailor the gas adsorption properties of PAN-based CNFs.

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