Effect of anion species on preparation and properties of pitch‑based activated carbon fibers by in‑situ catalytic activation of metal nanoparticles

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 32권 / 6호
ㆍ저자명 : Genchang Gou, Wenjie Wei, Jianxiao Yang, Jiahao Liu, Yue Liu, Jun Li, Kui Shi

목차

Abstract
Graphical abstract
1 Introduction
2 Experimental
2.1 Materials
2.2 Preparation of spinnable pitch and pitch-based activated carbon fibers
2.3 Material characterization
3 Results and discussion
3.1 Analysis of spinnable pitches
3.2 Melt-spinning analysis of spinnable pitches
3.3 Stabilization, carbonization and activation behaviors of pitch fibers
3.4 Properties of pitch-based activated carbon fibers
3.5 Catalytic activation mechanisms of pitch with metal nanoparticles
4 Conclusions
Acknowledgements
References

영어 초록

The pitch-based activated carbon fibers (ACFs) were prepared from ethylene tar-derived pitches containing nickelocene (CNi) or nickel nitrate (NiN). The effects of different anions and contents of metal salts on the microstructure and surface chemical properties of fibers were investigated. The results revealed that Ni2+ from CNi mainly remained its pristine molecule in the organometal salt-derived pitch (OP-xCNi), while Ni2+ from NiN occurred complexation reaction with polycyclic aromatic hydrocarbons (PAHs) in the inorganic metal salt-derived pitch (IP-xNiN) due to the weaker binding ability between anions and Ni2+ of CNi than CNi. The XRD and SEM results confirmed that IP-3NiN-ACF contained Ni, NiO, Ni2O3 nanoparticles with different size distributions, while OP-3CNi-ACF only contained more uniformly distributed Ni nanoparticles with small size. Furthermore, OP-3.0CNi-ACF presented higher specific surface area of 1862 m2/ g and a pore volume of 1.69 cm3/ g than those of IP-3.0NiN-ACF due to the formation of pore structure during the in-situ catalytic activation of different metal nanoparticles. Therefore, this work further pointed out that the desired pore structure and surface chemistry of pitch-based ACFs could be obtained through regulating and controlling the interaction of anion species, metal cations and PAHs during the synthesis of pitch precursors.

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