Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 48, Pages 41535-41543Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b16088
Keywords
carbon nanofiber; Co3O4; low thickness; device; microwave absorption
Funding
- Aeronautics Science Foundation of China [2017ZF52066]
- National Nature Science Foundation of China [11575085]
- Qing Lan Project
- Six talent peaks project in Jiangsu Province [XCL-035]
- Outstanding Doctoral Dissertation in NUAA [BCXJ 18-07]
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Lots of work has been done to develop microwave absorbing materials (MAM) utilized as flexible electronic devices and communication instruments. Conventionally developed powder MAM are often limited in practical applications because of the bad stability and poor durability, which is out of the scope for exploiting flexible and long-term microwave absorbers. To overcome such limitations, a facile and binder-free technique from a Co-based zeolitic imidazolate framework (ZIF-67, a member of metal organic frameworks)-coated carbon fiber precursor is developed for the in situ horizontal growth of Co3O4 nanoparticles, which embedded nitrogen-doped carbon array (triangular nanoplates) on the surface of carbon fibers in the carbon paper (NC-Co3O4/CP) as low-thickness MAM. The maximum reflection loss (RL) values reaches -16.12 and -34.34 dB when the thickness is 1.1 and 1.5 mm, respectively. As the thickness increases, the absorbing performance at low frequency performs well (RL < -20 dB). The hierarchical architecture is facilely originated from a metal-organic framework precursor. In view of the simple preparation technique, NC-Co3O4/CP exhibit huge potential in large-scale production of portable microwave absorbing electronic devices with strong microwave response at low thickness.
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