Flakes Size-Dependent Optical and Electrochemical Properties of MoS2
Background: Molybdenum disulfide (MoS2) is a transition metal dichalcogenides and has some interesting and promising properties. MoS2 has direct and indirect band gaps depending on its crystalline structure. In addition, its sheets morphology makes it a good candidate for supercapacitor applications...
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| Format: | Article |
| Language: | English |
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Bentham Science
2018
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| Online Access: | http://umpir.ump.edu.my/id/eprint/22120/ http://umpir.ump.edu.my/id/eprint/22120/1/Flakes%20Size.pdf |
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| author | Aboelazm, Eslam A. A. Ali, Gomaa A. M. Algarni, H. K. F., Chong |
| author_facet | Aboelazm, Eslam A. A. Ali, Gomaa A. M. Algarni, H. K. F., Chong |
| author_sort | Aboelazm, Eslam A. A. |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | Background: Molybdenum disulfide (MoS2) is a transition metal dichalcogenides and has some interesting and promising properties. MoS2 has direct and indirect band gaps depending on its crystalline structure. In addition, its sheets morphology makes it a good candidate for supercapacitor applications.
Objective: The aim of this work is to study the effect of MoS2 flakes size on its optical and electrochemical properties.
Method: MoS2 with different flakes sizes were prepared by exfoliation method. The exfoliation was performed by sonication of MoS2 powder in N,N-Dimethylformamide followed by different centrifugation speeds. UV-Vis spectra illustrated the optical energy gap was inversely proportional to the MoS2 flakes size.
Results: Absorption coefficient values indicated that the exfoliation reduced the number of layers. Symmetric supercapacitor was made from two MoS2 electrodes and tested in 6 M KOH electrolyte. The specific capacitance was found to be dramatically increased with decreasing flakes size (9.5 and 4.5 mF/cm2 for 0.26 and 0.98 µm flakes size, respectively).
Conclusion: These findings recommend that MoS2 can be the excellent electrode material for supercapacitor. |
| first_indexed | 2025-11-15T02:26:33Z |
| format | Article |
| id | ump-22120 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T02:26:33Z |
| publishDate | 2018 |
| publisher | Bentham Science |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-221202020-02-28T01:24:18Z http://umpir.ump.edu.my/id/eprint/22120/ Flakes Size-Dependent Optical and Electrochemical Properties of MoS2 Aboelazm, Eslam A. A. Ali, Gomaa A. M. Algarni, H. K. F., Chong QD Chemistry Background: Molybdenum disulfide (MoS2) is a transition metal dichalcogenides and has some interesting and promising properties. MoS2 has direct and indirect band gaps depending on its crystalline structure. In addition, its sheets morphology makes it a good candidate for supercapacitor applications. Objective: The aim of this work is to study the effect of MoS2 flakes size on its optical and electrochemical properties. Method: MoS2 with different flakes sizes were prepared by exfoliation method. The exfoliation was performed by sonication of MoS2 powder in N,N-Dimethylformamide followed by different centrifugation speeds. UV-Vis spectra illustrated the optical energy gap was inversely proportional to the MoS2 flakes size. Results: Absorption coefficient values indicated that the exfoliation reduced the number of layers. Symmetric supercapacitor was made from two MoS2 electrodes and tested in 6 M KOH electrolyte. The specific capacitance was found to be dramatically increased with decreasing flakes size (9.5 and 4.5 mF/cm2 for 0.26 and 0.98 µm flakes size, respectively). Conclusion: These findings recommend that MoS2 can be the excellent electrode material for supercapacitor. Bentham Science 2018 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/22120/1/Flakes%20Size.pdf Aboelazm, Eslam A. A. and Ali, Gomaa A. M. and Algarni, H. and K. F., Chong (2018) Flakes Size-Dependent Optical and Electrochemical Properties of MoS2. Current Nanoscience, 14 (5). pp. 416-420. ISSN 1573-4137 (Print); 1875-6786 (Online). (Published) https://doi.org/10.2174/1573413714666180228152602 DOI : 10.2174/1573413714666180228152602 |
| spellingShingle | QD Chemistry Aboelazm, Eslam A. A. Ali, Gomaa A. M. Algarni, H. K. F., Chong Flakes Size-Dependent Optical and Electrochemical Properties of MoS2 |
| title | Flakes Size-Dependent Optical and Electrochemical Properties of MoS2 |
| title_full | Flakes Size-Dependent Optical and Electrochemical Properties of MoS2 |
| title_fullStr | Flakes Size-Dependent Optical and Electrochemical Properties of MoS2 |
| title_full_unstemmed | Flakes Size-Dependent Optical and Electrochemical Properties of MoS2 |
| title_short | Flakes Size-Dependent Optical and Electrochemical Properties of MoS2 |
| title_sort | flakes size-dependent optical and electrochemical properties of mos2 |
| topic | QD Chemistry |
| url | http://umpir.ump.edu.my/id/eprint/22120/ http://umpir.ump.edu.my/id/eprint/22120/ http://umpir.ump.edu.my/id/eprint/22120/ http://umpir.ump.edu.my/id/eprint/22120/1/Flakes%20Size.pdf |