Silver Nanoparticle Decorated on Reduced Graphene Oxide-Wrapped Manganese Oxide Nanorods as Electrode Materials for High-Performance Electrochemical Devices
In this work, silver nanoparticles decorated on reduced graphene oxide (rGO) wrapped manganese oxide nanorods (Ag-rGO@MnO<sub>2</sub>) were synthesized for an active electrode material. MnO<sub>2</sub> nanorods were synthesized via a hydrothermal route, and their coating with...
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MDPI AG
2022-03-01
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| Online Access: | https://www.mdpi.com/2073-4352/12/3/389 |
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| author | Akhalakur Rahman Ansari Sajid Ali Ansari Nazish Parveen Mohammad Omaish Ansari Zurina Osman |
| author_facet | Akhalakur Rahman Ansari Sajid Ali Ansari Nazish Parveen Mohammad Omaish Ansari Zurina Osman |
| author_sort | Akhalakur Rahman Ansari |
| collection | DOAJ |
| description | In this work, silver nanoparticles decorated on reduced graphene oxide (rGO) wrapped manganese oxide nanorods (Ag-rGO@MnO<sub>2</sub>) were synthesized for an active electrode material. MnO<sub>2</sub> nanorods were synthesized via a hydrothermal route, and their coating with GO and subsequent reduction at a higher temperature resulted in rGO@MnO<sub>2</sub>. A further addition of Ag on rGO@MnO<sub>2</sub> was performed by dispersing rGO@MnO<sub>2</sub> in AgNO<sub>3</sub> solution and its subsequent reduction by NaBH<sub>4</sub>. X-ray diffraction (XRD) analysis showed peaks corresponding to MnO<sub>2</sub> and Ag, and the absence of a peak at 2θ = 26° confirmed a few layered coatings of rGO and the absence of any graphitic impurities. Morphological analysis showed Ag nanoparticles anchored on rGO coated MnO<sub>2</sub> nanorods. Apart from this, all other characterization techniques also confirmed the successful fabrication of Ag-rGO@MnO<sub>2</sub>. The electrochemical performance examined by cyclic voltammetry and the galvanic charge–discharge technique showed that Ag-rGO@MnO<sub>2</sub> has a superior capacitive value (675 Fg<sup>−1</sup>) as compared to the specific capacitance value of rGO@MnO<sub>2</sub> (306.25 Fg<sup>−1</sup>) and MnO<sub>2</sub> (293.75 Fg<sup>−1</sup>). Furthermore, the electrode based on Ag-rGO@MnO<sub>2</sub> nanocomposite showed an excellent capacity retention of 95% after 3000 cycles. The above results showed that Ag-rGO@MnO<sub>2</sub> nanocomposites can be considered an active electrode material for future applications in electrochemical devices. |
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| language | English |
| last_indexed | 2024-03-09T19:57:47Z |
| publishDate | 2022-03-01 |
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| spelling | doaj.art-295373703fba4262b037049b2998dd612023-11-24T00:51:59ZengMDPI AGCrystals2073-43522022-03-0112338910.3390/cryst12030389Silver Nanoparticle Decorated on Reduced Graphene Oxide-Wrapped Manganese Oxide Nanorods as Electrode Materials for High-Performance Electrochemical DevicesAkhalakur Rahman Ansari0Sajid Ali Ansari1Nazish Parveen2Mohammad Omaish Ansari3Zurina Osman4Department of Physics, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, MalaysiaDepartment of Physics, College of Science, King Faisal University, P.O. Box 400, Hofuf, Al-Ahsa 31982, Saudi ArabiaDepartment of Chemistry, College of Science, King Faisal University, P.O. Box 380, Hofuf, Al-Ahsa 31982, Saudi ArabiaCenter of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi ArabiaDepartment of Physics, Faculty of Science, Universiti Malaya, Kuala Lumpur 50603, MalaysiaIn this work, silver nanoparticles decorated on reduced graphene oxide (rGO) wrapped manganese oxide nanorods (Ag-rGO@MnO<sub>2</sub>) were synthesized for an active electrode material. MnO<sub>2</sub> nanorods were synthesized via a hydrothermal route, and their coating with GO and subsequent reduction at a higher temperature resulted in rGO@MnO<sub>2</sub>. A further addition of Ag on rGO@MnO<sub>2</sub> was performed by dispersing rGO@MnO<sub>2</sub> in AgNO<sub>3</sub> solution and its subsequent reduction by NaBH<sub>4</sub>. X-ray diffraction (XRD) analysis showed peaks corresponding to MnO<sub>2</sub> and Ag, and the absence of a peak at 2θ = 26° confirmed a few layered coatings of rGO and the absence of any graphitic impurities. Morphological analysis showed Ag nanoparticles anchored on rGO coated MnO<sub>2</sub> nanorods. Apart from this, all other characterization techniques also confirmed the successful fabrication of Ag-rGO@MnO<sub>2</sub>. The electrochemical performance examined by cyclic voltammetry and the galvanic charge–discharge technique showed that Ag-rGO@MnO<sub>2</sub> has a superior capacitive value (675 Fg<sup>−1</sup>) as compared to the specific capacitance value of rGO@MnO<sub>2</sub> (306.25 Fg<sup>−1</sup>) and MnO<sub>2</sub> (293.75 Fg<sup>−1</sup>). Furthermore, the electrode based on Ag-rGO@MnO<sub>2</sub> nanocomposite showed an excellent capacity retention of 95% after 3000 cycles. The above results showed that Ag-rGO@MnO<sub>2</sub> nanocomposites can be considered an active electrode material for future applications in electrochemical devices.https://www.mdpi.com/2073-4352/12/3/389manganese oxidereduced graphene oxidesilver nanoparticleselectrochemical properties |
| spellingShingle | Akhalakur Rahman Ansari Sajid Ali Ansari Nazish Parveen Mohammad Omaish Ansari Zurina Osman Silver Nanoparticle Decorated on Reduced Graphene Oxide-Wrapped Manganese Oxide Nanorods as Electrode Materials for High-Performance Electrochemical Devices Crystals manganese oxide reduced graphene oxide silver nanoparticles electrochemical properties |
| title | Silver Nanoparticle Decorated on Reduced Graphene Oxide-Wrapped Manganese Oxide Nanorods as Electrode Materials for High-Performance Electrochemical Devices |
| title_full | Silver Nanoparticle Decorated on Reduced Graphene Oxide-Wrapped Manganese Oxide Nanorods as Electrode Materials for High-Performance Electrochemical Devices |
| title_fullStr | Silver Nanoparticle Decorated on Reduced Graphene Oxide-Wrapped Manganese Oxide Nanorods as Electrode Materials for High-Performance Electrochemical Devices |
| title_full_unstemmed | Silver Nanoparticle Decorated on Reduced Graphene Oxide-Wrapped Manganese Oxide Nanorods as Electrode Materials for High-Performance Electrochemical Devices |
| title_short | Silver Nanoparticle Decorated on Reduced Graphene Oxide-Wrapped Manganese Oxide Nanorods as Electrode Materials for High-Performance Electrochemical Devices |
| title_sort | silver nanoparticle decorated on reduced graphene oxide wrapped manganese oxide nanorods as electrode materials for high performance electrochemical devices |
| topic | manganese oxide reduced graphene oxide silver nanoparticles electrochemical properties |
| url | https://www.mdpi.com/2073-4352/12/3/389 |
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