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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional de Colombia
2020
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=49664596025 https://www.redalyc.org/journal/496/49664596025/ https://www.redalyc.org/journal/496/49664596025/html/ https://www.redalyc.org/journal/496/49664596025/49664596025.epub https://www.redalyc.org/journal/496/49664596025/movil |
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Inhaltsangabe:
- Synthesis and evaluation of nickel doped Co3O4 produced through hydrothermal technique Leydi Julieta Cardenas-Flechas Angela Mercedes Raba Miryam Rincón-Joya Ingeniería doping Cobalt oxide nanostructures structural parameters The synthesis of undoped cobalt oxide and cobalt oxide with 4%nickel doping is studied in samples obtained through hydrothermal technique. After the final heat treatment at 300°C, X-ray diffraction analysis indicated the formation of cobalt spinel oxide with a complete replacement of nickel in the lattice. An average crystallite size of ~42 nm and ~31nm was found, as well as a particle size of ~ 20 nm and ~30 nm for Co3O4 and Co3-xNixO4, respectively. Structural parameters were established through Rietveld refinement with a good correspondence between the simulated and the experimental pattern with values of x2 = 1.25 and GOF = 0.90 for Co3O4. The energy band gap was found through UV-Vis spectroscopy in two different regions: Eg1 and Eg2 values vary between 1.54 and 2.04eV for samples doped with nickel. The SEM results indicated the formation of nanostructures with semi-cubic shape and irregular rods. Parameters such as crystal size, particle size, surface area, as well as morphology of the final product depend on doping. 2020 artículo científico 0012-7353 https://www.redalyc.org/articulo.oa?id=49664596025 https://www.redalyc.org/journal/496/49664596025/ https://www.redalyc.org/journal/496/49664596025/html/ https://www.redalyc.org/journal/496/49664596025/49664596025.epub https://www.redalyc.org/journal/496/49664596025/movil 10.15446/dyna.v87n213.84410 en http://www.redalyc.org/revista.oa?id=496 Dyna application/pdf Universidad Nacional de Colombia Dyna (Colombia) Num.213 Vol.87