Affiliation of Author(s):材料科学与技术学院
Journal:ACS APPLIED MATERIALS & INTERFACES
Key Words:carbonyl iron heterostructure multiple interfaces yolk-shell electromagnetic wave absorbing
Abstract:A novel yolk shell structure of cobalt nanoparticle embedded nano porous carbon@carbonyl iron (Co/NPC@Void@CI) was synthesized via metal organic chemical vapor deposition (MOCVD) and subsequent calcination treatment. The in situ generation of void layer, which originated from the shrink of a Co-based zeolitic imidazolate framework (ZIF-67) during carbonization, embodies distinct advantage compared to the conventional template method. Thanks to the introduction of custom designed dielectric/magnetic media heterostructure and multiple interfaces, the composites filled with 40 wt % of Co/NPC@Void@CI samples in paraffin exhibit a maximum reflection loss of -49.2 dB at 2.2 mm; importantly, a broad absorption bandwidth (RL < -10 dB) of 6.72 GHz can be obtained, which covers more than one-third of the whole frequency region from 10.56 to 17.28 GHz. This study not only develops the application of carbonyl iron as a high-efficiency light absorber but also initiates a fire-new avenue for artificially designed heterostructures with target functionalities.
ISSN No.:1944-8244
Translation or Not:no
Date of Publication:2017-03-22
Co-author:权斌,梁小会,马建娜,欧阳佩仪,宫赫,xgy,都有为
Correspondence Author:jiguangbin