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Synthesis and characterization of TiO2/polyaniline/graphene oxide bouquet-like composites for enhanced microwave absorption performance
Ist Teil von
Journal of alloys and compounds, 2017-07, Vol.710, p.717-724
Ort / Verlag
Lausanne: Elsevier B.V
Erscheinungsjahr
2017
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
In this work, a ternary composite of TiO2/Polyaniline/Graphene oxide (TiO2/PANI/GO) has been synthesized via an in-situ oxidation polymerization. The chemical composition and morphology have been characterized by FT-IR, XRD, Raman spectroscopy, SEM and TEM. The characterization shows that TiO2 nanoparticles are coated completely by PANI and then be wrapped in the curled GO, leading to a novel bouquet-like structure finally. The microwave absorption properties are investigated by means of vector network analyzer. In property the maximum reflection loss of the composites can reach −51.74 dB at 9.67 GHz, and bandwidth exceeding −10 dB (>90% attenuation) is 3.91 GHz with the absorber thickness of 3.12 mm. The maximum bandwidth exceeding −10 dB is 4.76 GHz (from 15.28 to 10.52 GHz) when the absorber thickness is 2.5 mm. An analysis on physical mechanism indicates the impedance matching effect plays an important role in enhancing microwave absorption for TiO2/PANI/GO composites.
•This work expands the potential application range of TiO2 used in the microwave absorbing field.•The morphology characterization shows a novel bouquet-like structure.•The first report about the composites with GO rather than r-GO.•Good compatibility, low density and controllable absorbing properties.