期刊
CHEMICAL ENGINEERING JOURNAL
卷 289, 期 -, 页码 261-269出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.01.003
关键词
3D structure; Electromagnetic wave; Absorption; HTC; Iron
资金
- National Natural Science Foundation of China [21446001]
- Program for Liaoning Innovative Research Team in University [LT2013012]
- Program for Liaoning Excellent Talents in University [LJQ2014056]
Three-dimensional (3D) hierarchical cabbage-like carbonaceous materials (Fe/CCMs-X, X means treating temperature) have been successfully prepared employing combinatorial processes of cobalt-assisted hydrothermal carbonization (HTC) of furfural and subsequent iron salt impregnation and thermal treatment. This new absorbent was characterized using powder X-ray diffraction (XRD), N-2 adsorption-desorption isotherms, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM) techniques. The maximum reflection loss (RL) of Fe/CCMs-500 reached -22.9 dB, and the effective absorption bandwidth (RL <= -10 dB) was 4.32 GHz (7.76-9.84 GHz and 11.20-13.44 GHz) corresponding to an absorber thickness of 2.5 mm, a low loading amount of iron (6.83%) component and high carbon content (69.8%), clearly demonstrating its wide absorption frequency range and strong absorption ability. It is thus believed that the newly synthesized Fe/CCMs-500 can serve as light-weight electromagnetic wave absorbent and can be potentially used in practice. (C) 2016 Elsevier B.V. All rights reserved.
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