Dielectric parameters of activated carbon derived from rosewood and corncob
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Dielectric parameters of activated carbon derived from rosewood and corncob XiuBo Xie1,* , Dan Wu1, Haitao Wu1, Chuanxin Hou1, Xueqin Sun1, Yuping Zhang1, Ronghai Yu2, Shangzhou Zhang3, Bing Wang4, and Wei Du1,* 1
School of Environmental and Material Engineering, Yantai University, No. 30 Qingquan Road, Yantai 264005, China Key Laboratory of Aerospace Materials and Performance (Ministry of Education, School of Materials Science and Engineering, Beihang University, No.37 Xueyuan Road, Beijing 100191, People’s Republic of China 3 College of Nuclear Equipment and Nuclear Engineering, Yantai University, No. 30 Qingquan Road, Yantai 264005, China 4 Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China 2
Received: 9 July 2020
ABSTRACT
Accepted: 26 August 2020
To make use of two waste natural corncob and rosewood, activated carbons are obtained through KOH activation at 1073 K. The two samples show sheet like morphology with some swells on the surface of the corncob activated carbon and pores in the rosewood activated carbon. The higher ID/IG value of rosewood activated carbon for the Raman spectrum measurement indicates its lower graphitization degree than corncob activated carbon, which is proved by X-ray diffraction patterns. The higher real and imaginary parts of the complex permittivity for the rosewood activated carbon are benefited from the differences of morphology and graphitization degree of the two samples. Apart from the dipole polarization, the charge polarization and interfacial polarization also contribute to the dielectric loss for the porous rosewood activated carbon.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction With the rapid development of world’s industrial, various carbon materials are developed as multifunction usage. Generally, carbon materials possess characteristics of high conductivity, light weight, high ductility and abundant on earth [1]. The porosity and delamination of the graphene and other carbon materials (such as nanotube, MOFs and amorphous carbon) can be used as nanoconfined material for decreasing particle size of the hydrogen
storage particles [2–4]. The nanoporous structure and doped elements can effectively improve the battery performance by relieving the structural stress caused by the repeated insertion/release of lithium ions [5]. Moreover, the porous carbon with much micropores especially the micropores at subnanometer (0.7 nm) and high surface area can effectively improve the specific capacitance [6, 7]. The carbon can protect the Pt, Ni, Co particles from agglomeration and thus improve the catalytic activation for p-nitrophenol removal [8]. Though the carbon materials are widely
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https://doi.org/10.1007/s10854-020-04358-8
J Mater Sci: Mater Electron
used in various applications, the preparation process of remaining graphene, nanotube, aerogel and nanofi
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