Constructing different 2D nano-materials into hybrids is an effective way to fabricate high-performance microwave
absorbing (MA) materials. The formed heterointerfaces offers new loss mechanisms to make up the
shortages of sole material in attenuating electromagnetic energy. For practical utilizations, microwave absorbers
perform at low-frequency band with light-weight and thinness are more desirable. Here, hybrids aerogel microspheres
constructed from graphene oxide (GO) and Ti3C2Tx MXene are manufactured by rapid freezing assisted
electrostatic-spinning. Combined with the disparities of conductivity between Ti3C2Tx MXene and GO, and
the newly generated heterointerfaces and abundant surface groups, the Ti3C2Tx MXene@GO hybrid aerogel
microspheres (M@GAMS) exhibit optimized impedance matching and improved MA performance. Besides, the
unique aerogel structure not only offers light weight merit for this absorber but also elongates the attenuating
paths when electromagnetic waves inject in. With a rather low filler loading of 10.0 wt% and a thickness of
1.2 mm, the optimized M@GAMS exhibit reflection loss (RL) of −49.1 dB at 14.2 GHz. More importantly, the
M@GAMS present effective MA at S-band, and the RL reaches −38.3 dB at 2.1 GHz with a thickness of 5.0 mm.
We believe the M@GAMS provides new opportunities for designing efficient MA absorbers, especially for the
Ying Li,Fanbin Meng,Yuan Mei,Huagao Wang,Yifan Guo,Ying Wang,Fuxi Peng,Fei Huang,Zuowan Zhou.
Chemical Engineering Journal,391,123512(2020)