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Photoelectrochemical and optical properties tuning of graphene-ZnO nanocomposites
Photoelectrochemical and optical properties tuning of graphene-ZnO nanocomposites
- Source :
- Journal of Alloys and Compounds. 767:982-987
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Graphene-ZnO (G-ZnO) nanocomposites were synthesized by simple and low cost co-precipitation and spin-coating technique. The graphene concentration has been tuned from 3 to 10 at. %. The microstructure and morphology of the synthesized nanocomposite was studied by X-ray diffraction (XRD), Raman spectroscopy and Scanning Electron Microscopy (SEM) techniques. Structural analysis by x-ray diffraction showed that G-ZnO was found to present hexagonal wurtzite–type structure and Raman spectroscopy showed the formation of graphene component. Compared to pure ZnO, photoluminescence (PL) intensity of the nanocomposites had decreased, due to quenching of photoemission, in the presence of graphene. The photo-response of the G-ZnO nanocomposite expands to the visible region up to 800 nm. A significant Photo-Electro-Chemical (PEC) activity enhancement has been observed for the 3 at.% graphene concentrated sample. Sensing characteristics of G-ZnO films was investigated. A strong improvement of the PEC efficiency has been obtained for the optimum G content of 3 at. %.
- Subjects :
- Diffraction
Quenching
Photoluminescence
Materials science
Nanocomposite
Graphene
Scanning electron microscope
Mechanical Engineering
Metals and Alloys
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Microstructure
01 natural sciences
0104 chemical sciences
law.invention
symbols.namesake
Chemical engineering
Mechanics of Materials
law
Materials Chemistry
symbols
0210 nano-technology
Raman spectroscopy
Subjects
Details
- ISSN :
- 09258388
- Volume :
- 767
- Database :
- OpenAIRE
- Journal :
- Journal of Alloys and Compounds
- Accession number :
- edsair.doi...........de4a90ce0a05c4f322d05179b05d5a9b
- Full Text :
- https://doi.org/10.1016/j.jallcom.2018.07.202