New functional graphene oxide based on transition metal complex (Cr/Fe) as wave absorber
In this article, the graphene oxide (GO) was produced from graphite by the “modified hammer” method. Then in order to achieve electromagnetic absorption, GO was reduced and modified two times. First, it was reduced and modified by Cr, and then for the second time, it reduced and remodified in a one-...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-09-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422012959 |
| _version_ | 1818027085366558720 |
|---|---|
| author | Amir Bahram Gharagozloo Bahrami Seyed Hajir Bahrami Saeed Saber-Samandari Elaheh Kowsari |
| author_facet | Amir Bahram Gharagozloo Bahrami Seyed Hajir Bahrami Saeed Saber-Samandari Elaheh Kowsari |
| author_sort | Amir Bahram Gharagozloo Bahrami |
| collection | DOAJ |
| description | In this article, the graphene oxide (GO) was produced from graphite by the “modified hammer” method. Then in order to achieve electromagnetic absorption, GO was reduced and modified two times. First, it was reduced and modified by Cr, and then for the second time, it reduced and remodified in a one-step process with FeCl2 and FeCl3. All the synthesized materials were characterized via SEM, TEM, XRD, FTIR, Raman spectroscopy. These methods showed that in each stage Cr-RGO and Fe–Cr-RGO were successfully produced and the method that has been used was prosperous. To investigate prominent electromagnetic (EM) absorption, every specimen was added to the epoxy matrix with different concentrations and molded with different thicknesses. To perfectly disperse modified reduced graphene oxides powder in the epoxy resin, a unique liquid Ions (Butyl methyl imidazolium bromide) was used. This product has a key role in dispersing the material into the matrix and in the meantime the resulted composites showed a better return loss (RL) in the network analyzer tests. With a series of tests and precise measurements, the optimum thickness and concentration of Cr-RGO or Fe–Cr-RGO to reach the maximum EM absorption were developed. The result shows that by increasing the concentration and the thickness of the specimens, electromagnetic absorption increases and this phenomenon has happened almost in the complete range of our desire microwave (MW) wavelengths (2–12 GHz). |
| first_indexed | 2024-12-10T04:42:17Z |
| format | Article |
| id | doaj.art-b8bb7de8ca4949bf9061d7d5c51388a0 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-10T04:42:17Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-b8bb7de8ca4949bf9061d7d5c51388a02022-12-22T02:01:51ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012036833696New functional graphene oxide based on transition metal complex (Cr/Fe) as wave absorberAmir Bahram Gharagozloo Bahrami0Seyed Hajir Bahrami1Saeed Saber-Samandari2Elaheh Kowsari3Nano Technology Group, Textile Engineering Department, Amirkabir University of Technology, Tehran, IranTextile Engineering Department, Amirkabir University of Technology, Tehran, IranNew Technologies Research Center, Amirkabir University of Technology, Tehran, Iran; Composites Research Laboratory (CRLab), Amirkabir University of Technology, Tehran, Iran; Corresponding author.Department of Chemistry, Amirkabir University of Technology, Tehran, IranIn this article, the graphene oxide (GO) was produced from graphite by the “modified hammer” method. Then in order to achieve electromagnetic absorption, GO was reduced and modified two times. First, it was reduced and modified by Cr, and then for the second time, it reduced and remodified in a one-step process with FeCl2 and FeCl3. All the synthesized materials were characterized via SEM, TEM, XRD, FTIR, Raman spectroscopy. These methods showed that in each stage Cr-RGO and Fe–Cr-RGO were successfully produced and the method that has been used was prosperous. To investigate prominent electromagnetic (EM) absorption, every specimen was added to the epoxy matrix with different concentrations and molded with different thicknesses. To perfectly disperse modified reduced graphene oxides powder in the epoxy resin, a unique liquid Ions (Butyl methyl imidazolium bromide) was used. This product has a key role in dispersing the material into the matrix and in the meantime the resulted composites showed a better return loss (RL) in the network analyzer tests. With a series of tests and precise measurements, the optimum thickness and concentration of Cr-RGO or Fe–Cr-RGO to reach the maximum EM absorption were developed. The result shows that by increasing the concentration and the thickness of the specimens, electromagnetic absorption increases and this phenomenon has happened almost in the complete range of our desire microwave (MW) wavelengths (2–12 GHz).http://www.sciencedirect.com/science/article/pii/S2238785422012959Graphene oxideReduced graphene oxideWave absorptionElectromagnetic shieldingMicrowave |
| spellingShingle | Amir Bahram Gharagozloo Bahrami Seyed Hajir Bahrami Saeed Saber-Samandari Elaheh Kowsari New functional graphene oxide based on transition metal complex (Cr/Fe) as wave absorber Journal of Materials Research and Technology Graphene oxide Reduced graphene oxide Wave absorption Electromagnetic shielding Microwave |
| title | New functional graphene oxide based on transition metal complex (Cr/Fe) as wave absorber |
| title_full | New functional graphene oxide based on transition metal complex (Cr/Fe) as wave absorber |
| title_fullStr | New functional graphene oxide based on transition metal complex (Cr/Fe) as wave absorber |
| title_full_unstemmed | New functional graphene oxide based on transition metal complex (Cr/Fe) as wave absorber |
| title_short | New functional graphene oxide based on transition metal complex (Cr/Fe) as wave absorber |
| title_sort | new functional graphene oxide based on transition metal complex cr fe as wave absorber |
| topic | Graphene oxide Reduced graphene oxide Wave absorption Electromagnetic shielding Microwave |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422012959 |
| work_keys_str_mv | AT amirbahramgharagozloobahrami newfunctionalgrapheneoxidebasedontransitionmetalcomplexcrfeaswaveabsorber AT seyedhajirbahrami newfunctionalgrapheneoxidebasedontransitionmetalcomplexcrfeaswaveabsorber AT saeedsabersamandari newfunctionalgrapheneoxidebasedontransitionmetalcomplexcrfeaswaveabsorber AT elahehkowsari newfunctionalgrapheneoxidebasedontransitionmetalcomplexcrfeaswaveabsorber |