Effect of Nickel Nitrate Concentration on Microstructure and Microwave Absorbing Property of Ni/RGO Nanocomposite Material

doi:10.15541/jim20160046

Abstract

Abstract:

A technique for obtaining reduced graphite oxide (RGO) with Ni nanoparticle dispersed on the surface via chemical vapor deposition (CVD) method was reported. XRD and SEM observations were carried out to confirm the microstructure of Ni/RGO composite. Magnetic property of Ni/RGO was characterized by vector network analyzer. The influence of Ni(NO₃)₂ concentration on micromorphology and microwave absorbing property were also discussed. As the concentration of Ni(NO₃)₂ is 1.5 mol/L, the range of the reflection loss (RL) less than -5 dB is 9 GHz, of which the max value reaches -40 dB.

Key words: nickel, graphite oxide, nanocomposite material, microwave absorbing

CLC Number:

TB333

ZHU Hai, YANG Li, LIU Hong-Bo, CHEN Hui, XIA Xiao-Hong. Effect of Nickel Nitrate Concentration on Microstructure and Microwave Absorbing Property of Ni/RGO Nanocomposite Material[J]. Journal of Inorganic Materials, 2016, 31(11): 1223-1229.

Figures/Tables 7

Fig. 1 SEM images of Ni/RGO-0.5 (a), Ni/RGO-1.0 (b), Ni/RGO-1.5 with EDS pattern in inset (c), and Ni/RGO-2.0 (d)

Fig. 2 XRD patterns of Ni/RGO-0.5, Ni/RGO-1.0, Ni/RGO-1.5, and Ni/RGO-2.0

Fig. 3 FTIR spectra of GO and Ni/RGO-1.0

Fig. 4 Electromagnetic parameters of Ni/RGO-0.5, Ni/RGO-1.0, Ni/RGO-1.5, and Ni/RGO-2.0

Fig. 5 tanδε and tanδμ of Ni/RGO-0.5 (a), Ni/RGO-1.0 (b), Ni/RGO-1.5 (c), and Ni/RGO-2.0 (d)

Fig. 6 Theoretical reflection losses of Ni/RGO-0.5 (a), Ni/RGO-1.0 (b) , Ni/RGO-1.5 (c), and Ni/RGO-2.0 (d)

Table 1 Electromagnetic property of Ni/RGO-0.5, Ni/RGO-1.0, Ni/RGO-1.5, and Ni/RGO-2.0

Sample	Ni/RGO-0.5
Material thickness /mm	1.50	2.0	1.5	2.0	1.5	2.0	1.5	2.0
Absorbing scale lower than -5 dB/GHz	11.5-18.0	8.5-13.2	12.4-18.0	9.0-15.4	13-18	9-18	13-18	9.5-18.0
Absorbing width lower than -5 dB/GHz	6.5	5.3	5.6	6.4	5.0	9.0	5.0	8.5
Max value of RL/dB	-18.5	-17.0	-23.0	-18.0	-44.0	-40.0	-28.8	-25.9
Matching frequence for RL_max /GHz	14.0	10.5	15.5	11.2	17.0	12.2	17.8	12.6

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