|
1
|
Boukhoubza I, Matei E, Jorio A, Enculescu M, Enculescu I. Electrochemical Deposition of ZnO Nanowires on CVD-Graphene/Copper Substrates. Nanomaterials (Basel) 2022; 12:2858. [PMID: 36014723 PMCID: PMC9415633 DOI: 10.3390/nano12162858] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/11/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
ZnO nanostructures were electrochemically synthesized on Cu and on chemical vapor deposited (CVD)-graphene/Cu electrodes. The deposition was performed at different electrode potentials ranging from -0.8 to -1.2 V, employing a zinc nitrate bath, and using voltametric and chronoamperometric techniques. The effects of the electrode nature and of the working electrode potential on the structural, morphological, and optical properties of the ZnO structures were investigated. It was found that all the samples crystallize in hexagonal wurtzite structure with a preferential orientation along the c-axis. Scanning electron microscopy (SEM) images confirm that the presence of a graphene covered electrode led to the formation of ZnO nanowires with a smaller diameter compared with the deposition directly on copper surface. The photoluminescence (PL) measurements revealed that the ZnO nanowires grown on graphene/Cu exhibit stronger emission compared to the nanowires grown on Cu. The obtained results add another possibility of tailoring the properties of such nanostructured films according to the specific functionality required.
Collapse
Affiliation(s)
- Issam Boukhoubza
- Group of Nanomaterials and Renewable Energies, Laboratory of Solid State Physics, Faculty of Sciences Dhar El Mahraz, Sidi Mohammed Ben Abdellah University, P.O. Box 1796, Atlas Fez 30000, Morocco
| | - Elena Matei
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
| | - Anouar Jorio
- Group of Nanomaterials and Renewable Energies, Laboratory of Solid State Physics, Faculty of Sciences Dhar El Mahraz, Sidi Mohammed Ben Abdellah University, P.O. Box 1796, Atlas Fez 30000, Morocco
| | - Monica Enculescu
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
| | - Ionut Enculescu
- National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania
| |
Collapse
|
|
2
|
Boukhoubza I, Khenfouch M, Achehboune M, Leontie L, Galca AC, Enculescu M, Carlescu A, Guerboub M, Mothudi BM, Jorio A, Zorkani I. Graphene Oxide Concentration Effect on the Optoelectronic Properties of ZnO/GO Nanocomposites. Nanomaterials (Basel) 2020; 10:nano10081532. [PMID: 32764216 PMCID: PMC7466397 DOI: 10.3390/nano10081532] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 07/29/2020] [Accepted: 07/31/2020] [Indexed: 11/18/2022]
Abstract
In this work, the effects of graphene oxide (GO) concentrations (1.5 wt.%, 2.5 wt.%, and 5 wt.%) on the structural, morphological, optical, and luminescence properties of zinc oxide nanorods (ZnO NRs)/GO nanocomposites, synthesized by a facile hydrothermal process, were investigated. X-ray diffraction (XRD) patterns of NRs revealed the hexagonal wurtzite structure for all composites with an average coherence length of about 40–60 nm. A scanning electron microscopy (SEM) study confirmed the presence of transparent and wrinkled, dense GO nanosheets among flower-like ZnO nanorods, depending on the GO amounts used in preparation. Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible (UV–Vis) absorption spectroscopy, and photoluminescence (PL) measurements revealed the impact of GO concentration on the optical and luminescence properties of ZnO NRs/GO nanocomposites. The energy band gap of the ZnO nanorods was independent of GO concentration. Photoluminescence spectra of nanocomposites showed a significant decrease in the intensities in the visible light range and red shifted suggesting a charge transfer process. The nanocomposites’ chromaticity coordinates for CIE 1931 color space were estimated to be (0.33, 0.34), close to pure white ones. The obtained results highlight the possibility of using these nanocomposites to achieve good performance and suitability for optoelectronic applications.
Collapse
Affiliation(s)
- Issam Boukhoubza
- Group of Nanomaterials and Renewable Energies, Laboratory of Solid State Physics, Faculty of Sciences Dhar el Mahraz, Sidi Mohammed Ben Abdellah University, P.O. Box 1796, Atlas Fez 30 000, Morocco; (I.B.); (M.A.); (M.G.); (A.J.); (I.Z.)
- Africa Graphene Center, Department of Physics, College of Science, Engineering and Technology, Science Campus, University of South Africa, Cnr Christiaan de Wet & Pioneer Avenue, Florida 1709, Johannesburg, South Africa;
| | - Mohammed Khenfouch
- Africa Graphene Center, Department of Physics, College of Science, Engineering and Technology, Science Campus, University of South Africa, Cnr Christiaan de Wet & Pioneer Avenue, Florida 1709, Johannesburg, South Africa;
| | - Mohamed Achehboune
- Group of Nanomaterials and Renewable Energies, Laboratory of Solid State Physics, Faculty of Sciences Dhar el Mahraz, Sidi Mohammed Ben Abdellah University, P.O. Box 1796, Atlas Fez 30 000, Morocco; (I.B.); (M.A.); (M.G.); (A.J.); (I.Z.)
- Africa Graphene Center, Department of Physics, College of Science, Engineering and Technology, Science Campus, University of South Africa, Cnr Christiaan de Wet & Pioneer Avenue, Florida 1709, Johannesburg, South Africa;
| | - Liviu Leontie
- Faculty of Physics, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, nr. 11, 700506 Iasi, Romania;
| | - Aurelian Catalin Galca
- Laboratory of Multifunctional Materials and Structures, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania;
| | - Monica Enculescu
- Laboratory of Multifunctional Materials and Structures, National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania;
- Correspondence:
| | - Aurelian Carlescu
- Integrated Center for Studies in Environmental Science for North-East Region, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, nr. 11, 700506 Iasi, Romania;
| | - Mohammed Guerboub
- Group of Nanomaterials and Renewable Energies, Laboratory of Solid State Physics, Faculty of Sciences Dhar el Mahraz, Sidi Mohammed Ben Abdellah University, P.O. Box 1796, Atlas Fez 30 000, Morocco; (I.B.); (M.A.); (M.G.); (A.J.); (I.Z.)
| | - Bakang Moses Mothudi
- Department of Physics, University of South Africa, Private Bag X90, Florida 1710, South Africa;
| | - Anouar Jorio
- Group of Nanomaterials and Renewable Energies, Laboratory of Solid State Physics, Faculty of Sciences Dhar el Mahraz, Sidi Mohammed Ben Abdellah University, P.O. Box 1796, Atlas Fez 30 000, Morocco; (I.B.); (M.A.); (M.G.); (A.J.); (I.Z.)
| | - Izeddine Zorkani
- Group of Nanomaterials and Renewable Energies, Laboratory of Solid State Physics, Faculty of Sciences Dhar el Mahraz, Sidi Mohammed Ben Abdellah University, P.O. Box 1796, Atlas Fez 30 000, Morocco; (I.B.); (M.A.); (M.G.); (A.J.); (I.Z.)
| |
Collapse
|