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Ahmed S, Shahid MM, Bakar SA, Arshed N, Basirun WJ, Fouad H. Fabrication and Characterization of SnO-Cu₂O Mixed Metal Oxide Thin Films for Photoelectrochemical Applications. J Nanosci Nanotechnol 2020; 20:7705-7709. [PMID: 32711646 DOI: 10.1166/jnn.2020.18570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Herein, we report the synthesis of SnO, Cu₂O and SnO-Cu₂O mixed oxide thin films on fluorinedoped tin oxide (FTO) substrate by Aerosol-Assisted Chemical Vapour Deposition (AACVD) process using [Cu (dmae)₂(H₂O)] and [Sn (dmae) (OAc)]₂ as molecular precursors for SnO and Cu₂O, respectively at 400 °C. The X-ray diffraction (XRD) pattern can be ascribed to the tetragonal phase of SnO crystals with space group P4 and cubic phase of Cu₂O crystals with space group Pn- 3m/nmm, respectively. The surface morphology characteristics of SnO, Cu₂O and SnO-Cu₂Omixed oxide have been investigated using Field Emission Scanning Electron Microscope (FESEM) which revealed that the SnO was grown homogeneously in cubical shape while Cu₂O possess nano balls shaped morphologies. The UV band gap values of SnO-Cu₂O mixed oxide thin film was found to be 2.6 eV appropriate for photoelectrochemical (PEC) applications. The synthesized material was proposed for PEC applications and has shown enhanced catalytic performance in the presence of light.
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Affiliation(s)
- Sohail Ahmed
- Department of Chemistry, Faculty of Science, The University of Haripur, KPK 22620, Pakistan
| | - M M Shahid
- Micro-Nano System Centre, School of Information Science & Technology, Fudan University, Shanghai 200433, China
| | - Shahzad Abu Bakar
- Nanosciences and Technology Department (NS & TD), National Centre for Physics (NCP), 44000 Islamabad, Pakistan
| | - Numan Arshed
- Micro-Nano System Centre, School of Information Science & Technology, Fudan University, Shanghai 200433, China
| | - Wan Jefrey Basirun
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - H Fouad
- Applied Medical Science Department, Community College, King Saud University, Riyadh 11433, Saudi Arabia
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Sagadevan S, Marlinda AR, Johan MR, Umar A, Fouad H, Alothman OY, Khaled U, Akhtar MS, Shahid MM. Reduced graphene/nanostructured cobalt oxide nanocomposite for enhanced electrochemical performance of supercapacitor applications. J Colloid Interface Sci 2019; 558:68-77. [PMID: 31585223 DOI: 10.1016/j.jcis.2019.09.081] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/19/2019] [Accepted: 09/21/2019] [Indexed: 01/25/2023]
Abstract
We demonstrate the preparation of nanostructures cobalt oxide/reduced graphene oxide (Co3O4/rGO) nanocomposites by a simple one-step cost-effective hydrothermal technique for possible electrode materials in supercapacitor application. The X-ray diffraction patterns were employed to confirm the nanocomposite crystal system of Co3O4/rGO by demonstrating the existence of normal cubic spinel structure of Co3O4 in the matrix of Co3O4/rGO nanocomposite. FTIR and FT-Raman studies manifested the structural behaviour and quality of prepared Co3O4/rGO nanocomposite. The optical properties of the nanocomposite Co3O4/rGO have been investigated by UV absorption spectra. The SEM/TEM images showed that the Co3O4 nanoparticles in the Co3O4/rGO nanocomposites were covered over the surface of the rGO sheets. The electrical properties were analyzed in terms of real and imaginary permittivity, dielectric loss and AC conductivity. The electrocatalytic activities of synthesized Co3O4/rGO nanocomposites were determined by cyclic voltammetry and charge-discharge cycle to evaluate the supercapacitive performance. The specific capacitance of 754 Fg-1 was recorded for Co3O4/rGO nanocomposite based electrode in three electrode cell system. The electrode material exhibited an acceptable capability and excellent long-term cyclic stability by maintaining 96% after 1000 continuous cycles. These results showed that the prepared sample could be an ideal candidate for high-energy application as electrode materials. The synthesized Co3O4/rGO nanocomposite is a versatile material and can be used in various application such as fuel cells, electrochemical sensors, gas sensors, solar cells, and photocatalysis.
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Affiliation(s)
- Suresh Sagadevan
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia.
| | - A R Marlinda
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia
| | - Mohd Rafie Johan
- Nanotechnology & Catalysis Research Centre, University of Malaya, Malaysia
| | - Ahmad Umar
- Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices, Najran University, Najran 11001, Saudi Arabia.
| | - H Fouad
- Applied Medical Science Dept., Community College, King Saud University, Riyadh, Saudi Arabia; Department of Biomedical Engineering, Faculty of Engineering, Helwan University, Egypt
| | - Othman Y Alothman
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Usama Khaled
- Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia; Department of Electrical Engineering, Faculty of Energy Engineering, Aswan University, Aswan 81528, Egypt
| | - M S Akhtar
- New and Renewable Energy Materials Development Center (NewREC), Chonbuk National University, Jeonbuk 56332, Republic of Korea.
| | - M M Shahid
- Higher Institution Centre of Excellence (HICoE), UM Power Energy Dedicated Advanced Centre (UMPEDAC), 59990 Kuala Lumpur, Malaysia
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