Synthesis of Hybrid Carbon Materials Consisting of N-Doped Microporous Carbon and Amorphous Carbon Nanotubes.

Wojciech Zielinski,Piotr Kamedulski,Malgorzata Skorupska,Aleksander Smolarkiewicz-Wyczachowski,Jerzy P Lukaszewicz,Anna Ilnicka

doi:10.3390/ma13132997

Wojciech Zielinski, Piotr Kamedulski + Show 4 more

Open Access

https://doi.org/10.3390/ma13132997

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Journal: Materials	Publication Date: Jul 6, 2020
Citations: 5	License type: CC BY 4.0

Affiliation: Nicolaus Copernicus University

Abstract

The N-doped hybrid carbon materials containing amorphous carbon nanotubes (ACNTs) were obtained by free growth of a polymer at 200 °C. The improvement of electrical conductivity was achieved by a final carbonization at 600–800 °C under the flow of nitrogen. The microstructure of ACNT/N-doped hybrids was characterized using a transmission electron microscope and X-ray diffusion. Furthermore, their elemental composition was measured using energy-dispersive X-ray spectroscopy and an elemental analyzer. The experimental results indicated that the ACNTs had a diameter in the range of 40–60 nm and the N-doped carbon background contained nitrogen atoms in most bonded pyrrolic-N and quaternary-N groups. The results revealed that the microstructure of the as-grown nanotubes, prepared by the proposed method, is mainly amorphous. This technique introduces the advantages of low cost and process simplicity, which may redeem some drawbacks of the methods commonly used in ACNT synthesis.

Highlights

In the past two decades, the interest in carbon nanotubes (CNTs) has strongly increased.Generally, carbon nanotubes can be produced by different methods and the following are very popular: chemical vapor deposition (CVD) [1], laser ablation [2]. and the arc method [3]
All images depict the growth of amorphous carbon nanotubes (ACNTs) using the direct thermal conversion of polyfurfuryl alcohol (PFA)
ACNT/N-doped AC hybrid carbon tubes were prepared by free growth of polymers on a nitrogen-doped carbon surface

Summary

Introduction

In the past two decades, the interest in carbon nanotubes (CNTs) has strongly increased.Generally, carbon nanotubes can be produced by different methods and the following are very popular: chemical vapor deposition (CVD) [1], laser ablation [2]. and the arc method [3]. With the nanometer size and tube-like shape, have different graphitization feature from the bulk carbon. Ci et al investigated graphitization behavior of carbon nanotubes, produced by the floating catalyst method [4]. The ACNTs have many unique structures, such as the amorphous wall, larger interior, as well as the nano-scale tubular shape and diameters [11,12,13]. Another type of carbon material with sp and sp bonds is the amorphous carbon nanowire (CNW) produced at 1200 ◦ C by heating a pressed tablet of graphite powder mixed with nickel in a quartz tube [14].

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