Water-assisted and Controllable Synthesis of Core/shell/shell Structured Carbon-based Nanohybrids, and Their Magnetic and Microwave Absorption Properties

Overview

Journal Sci Rep

Specialty Science

Date 2017 Aug 31

PMID 28852184

Citations 4

Authors

Xiaosi Qi

Erqi Yang

Hongbo Cai

Ren Xie

Zhongchen Bai

Yang Jiang

Shuijie Qin

Wei Zhong

Youwei Du

Affiliations

Soon will be listed here.

Abstract

By controlling the pyrolysis temperature, core/shell/shell structured Fe/FeC/carbon nanotube bundles (Fe/FeC/CNTBs), Fe/FeC/helical carbon nanotubes (Fe/FeC/HCNTs) and Fe/FeC/chain-like carbon nanospheres (Fe/FeC/CCNSs) with high encapsulation efficiency could be selectively synthesized in large-scale by water-assisted chemical vapor deposition method. Water vapor was proved to play an important role in the growth process. Because of α-Fe nanoparticles tightly wrapped by two layers, the obtained core/shell/shell structured nanohybrids showed high stabilities and good magnetic properties. The minimum reflection loss values of the as-prepared nanohybrids reached approximately -15.0, -46.3 and -37.1 dB, respectively. The excellent microwave absorption properties of the as-prepared core/shell/shell structured nanohybrids were considered to the quarter-wavelength matching model. Moreover, the possible enhanced microwave absorption mechanism of the as-prepared Fe/FeC/HCNTs and Fe/FeC/CCNSs were discussed in details. Therefore, we proposed a simple, inexpensive and environment-benign strategy for the synthesis of core/shell/shell structured carbon-based nanohybrids, exhibiting a promising prospect as high performance microwave absorbing materials.

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