Synthesis and Enhanced Electro-Magnetic Wave Absorbing Properties of Reduced Graphene Oxide-Fe3O4-Polyaniline Ternary Nano-Composites

2021 ◽  
Vol 13 (3) ◽  
pp. 473-480
Author(s):  
Yihan Jin ◽  
Xi Luo ◽  
Jinglin Zhang ◽  
Dongliang Zhao ◽  
Kewei Gao
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Nano Particles ◽  
Magnetic Data ◽  
Nano Composites ◽  
Frequency Bandwidth ◽  
Magnetic Wave ◽  
Three Samples ◽  
Reduced Graphene ◽  
Electro Magnetic

Micro-emulsion method is adopted to synthesis rGO-Fe3O4-PANI (reduced graphene oxide-Fe3O4-polyaniline) ternary nano-composites. With the different contents of aniline (0.1 g, 0.2 g, 0.3 g) added in production, the corresponding final products are named as sample 1, sample 2, sample 3, respectively. The results of TEM indicate that the mean size of Fe3O4 nano-particles is 14 nm and they are anchored onto rGO slice. There are some PANI polymer wrinkles distributed on the rGO surface uniformly. The electro-magnetic data demonstrate that sample 1 possess a great enhancement of the electro-magnetic wave absorption abilities and frequency bandwidth among the three samples. The RLmin (minimum reflection loss) value of sample 1 is -44.16 dB at 4.29 GHz with 5 mm coating thickness and 1.77 GHz (3.72-4.94 GHz, 13.33-13.88 GHz) frequency bandwidth (RL <italic/> -10 dB). We can believe that this kind of nano-composites will have a promising application in the future.

Electro-Magnetic Wave Absorbing Properties Study of Nano-Composites Based on Fe3O4

2021 ◽  
Vol 13 (3) ◽  
pp. 447-454
Author(s):  
Yihan Jin ◽  
Xi Luo ◽  
Jinglin Zhang ◽  
Yipeng Yu ◽  
Jing An ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Nano Particles ◽  
Magnetic Wave ◽  
Transmission Electron ◽  
Reduced Graphene ◽  
Micro Emulsion ◽  
Mean Size ◽  
Electro Magnetic ◽  
Magnetic Nano Particles

Chemical coprecipitation method, hydrothermal method and micro-emulsion method were adopted to prepare pure Fe3O4 (X1) magnetic nano-particles, reduced graphene oxide-Fe3O4 (X2) binary composites and reduced graphene oxide-Fe3O4-polyaniline (X3) ternary composites. The morphology, structure and magnetic performance were characterized by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM) and vibration sample magnetism (VSM). The result of TEM showed that Fe3O4 nano-particles distributed uniformly on the surface of graphene and PANI matrix and the mean size was bout 13~14 nm. The electromagnetic data was tested by vector network analyzer demonstrating that the minnimum reflection loss (RLmin) value of X3 was -53.94 dB at 16.1 GHz with 1.5 mm thickness and 3.82 GHz (14.18~18 GHz) absorbing bandwidth (RL<italic/>-10 dB). Compared with pure magnetic Fe3O4 powders and rGO-Fe3O4 binary composites, the rGO-Fe3O4-PANI ternary composites were conduced to a great reinforce of the electro-magnetic wave absorbing properties and absorbing bandwidth.

Synthesis and characterization of copper particles decorated reduced graphene oxide nano composites for the application of supercapacitors

2018 ◽  
Author(s):  
B. V. Naveen Kumar ◽  
Putra Kumar Balla ◽  
Satya Kamal Chirauri ◽  
T. K. Visweswara Rao ◽  
Y. Ramakrishna ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Synthesis And Characterization ◽  
Nano Composites ◽  
Copper Particles ◽  
Reduced Graphene

Promoting polysulfide conversion by catalytic separator with LiNiPO4 and rGO hybrids for high performance Li–S batteries

2020 ◽  
Vol 8 (38) ◽  
pp. 20111-20121
Author(s):  
Yinze Zuo ◽  
Yuejin Zhu ◽  
Qi Wang ◽  
Kezhong Lv ◽  
Weiming Su ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reaction Kinetics ◽  
Reduced Graphene Oxide ◽  
High Performance ◽  
Coating Layer ◽  
Nano Particles ◽  
Functional Coating ◽  
Shuttle Effect ◽  
Reduced Graphene ◽  
Novel Strategy

A novel strategy for suppressing the “shuttle effect” of LiPSs and facilitating reaction kinetics is achieved using the reduced graphene oxide (rGO) with incorporated polar LiNiPO4 (LNPO) nano-particles as functional coating layer for separator.

Role of Reduced Graphene Oxide on Mechanical-thermal Properties of Aluminum Metal Matrix Nano Composites

2015 ◽  
Vol 2 (4-5) ◽  
pp. 1270-1275 ◽  
Author(s):  
K. Srinivasulu Reddy ◽  
D. Sreedhar ◽  
K. Deepak Kumar ◽  
G. Praveen Kumar
Keyword(s):  
Graphene Oxide ◽  
Thermal Properties ◽  
Reduced Graphene Oxide ◽  
Metal Matrix ◽  
Nano Composites ◽  
Aluminum Metal ◽  
Reduced Graphene

scholarly journals A Study on Phase and Microstructure of Reduced Graphene Oxide Prepared by Heating Corncobs

2020 ◽  
Vol 5 (2) ◽  
pp. 66-70
Author(s):  
Kusuma Wardhani Mas'udah ◽  
◽  
Ahmad Taufiq ◽  
Sunaryono Sunaryono ◽  
◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxide Phase ◽  
Xrd Analysis ◽  
Holding Time ◽  
Layer Arrangement ◽  
Three Samples ◽  
Reduced Graphene

The purpose of this study was to find out reduced graphene oxide (RGO) phases by identifying the system, elemental system, and microstructure of corncobs. Characterization was carried out by XRD and SEM-EDX spectroscopy. The temperatures used in this work are 100, 200, and 250 ºC with a holding time of 1 hour. XRD analysis shows that the RGO phase is formed by the structure of the aromatic layer arrangement (graphite 002), and the widening comes from small-dimensional crystallites perpendicular to the aromatic layer (graphite 120). The elements contained in the three samples have a dominant proportion in the elements carbon and oxygen. From the SEM results obtained the morphology of corncobs powder that looks like sheets. The reduced graphene oxide phase is formed from the process of reducing corncobs powder.

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