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

被引：18

作者：

Park, Junbeom ^{[1
,3
]}

Kretzschmar, Ansgar ^{[1
,2
]}

Selmert, Victor ^{[1
,2
]}

Camara, Osmane ^{[1
]}

Kungl, Hans ^{[1
]}

Tempel, Hermann ^{[1
]}

Basak, Shibabrata ^{[1
,4
]}

Eichel, Ruediger A. ^{[1
,2
]}

机构：

[1] Forschungszentrum Julich, Inst Energy & Climate Res Fundamental Electrochem, D-52425 Julich, Germany

[2] Rhein Westfal TH Aachen, Inst Phys Chem, D-52074 Aachen, Germany

[3] Rhein Westfal TH Aachen, Inst Inorgan Chem, D-52074 Aachen, Germany

[4] Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52425 Julich, Germany

来源：

ACS APPLIED MATERIALS & INTERFACES | 2021年 / 13卷 / 39期

关键词：

PAN-based CNF; structural transformation; carbonization temperature; CO2; adsorption; TEM; electron diffraction; X-RAY-DIFFRACTION; ACTIVATED CARBON; CO2; FIBERS; CARBONIZATION; MICROSTRUCTURE; MICROPORES;

D O I：

10.1021/acsami.1c13541

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Polyacrylonitrile-based carbon nanofibers (PAN-based CNFs) have great potential to be used for carbon dioxide (CO2) capture due to their excellent CO2 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, 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, 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.

引用

页码：46665 / 46670

页数：6

共 34 条

[1] Modeling of disorder and X-ray diffraction in coal-based graphitic carbons [J].