Morphology-controlled synthesis, characterization and microwave absorption properties of nanostructured 3D CeO 2

• DOI: 10.1016/j.mssp.2015.06.077
• Publication Date: 2015-11-20T15:32:15Z
• Authors: Guanglei Wu; Yonghong Cheng; Feng Xiang; Zirui Jia; Qian Xie; Gaoqing Wu; Hongjing Wu
• Keywords: 0103 physical sciences; 01 natural sciences

Abstract Nanostructured 3D CeO 2 have been synthesized by using PEG 2000 assisted simple hydrothermal technique. The impact of this novel approach on the structure, morphology, spectroscopy, complex permittivity and permeability was discussed. CeO 2 was studied by employing X-ray diffraction (XRD), Raman spectra, field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TG) and vector network analyzer. It can be seen that the microspheres of 1–3 μm in diameter were prepared at 600 °C with a mole ratio of 2:1, while the decreasing concentration of PEG-2000 resulted in the appearance of dim side-shape geometry. Obviously, the morphology of the synthesized CeO 2 gradually changed from sphere with relatively smooth to irregular side-shape annealed at 600 °C with the increase of mole ratio for reactants. The electromagnetic (EM) wave absorption properties of the synthesized CeO 2 were investigated over the range from 2 to 16 GHz, and minimum reflection loss (RL) with −19.3 dB was observed at 15.8 GHz with the thickness of 2.0 mm. This phenomenon may be attributed to both intrinsic characteristic of CeO 2 and preparation with the function of PEG-2000.