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Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique
Nanostructured NiO and Li-ion doped NiO have been synthesized via a facile microwave technique and simulated using the first principle method. The effects of microwaves on the morphology of the nanostructures have been studied by Field Emission Spectroscopy. X-ray diffraction studies confirm the nan...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7372403/ https://www.ncbi.nlm.nih.gov/pubmed/32630747 http://dx.doi.org/10.3390/ma13132961 |
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author | Bhatt, Aarti S. Ranjitha, R. Santosh, M. S. Ravikumar, C. R. Prashantha, S. C. Maphanga, Rapela R. Silva, Guilherme F. B. Lenz e |
author_facet | Bhatt, Aarti S. Ranjitha, R. Santosh, M. S. Ravikumar, C. R. Prashantha, S. C. Maphanga, Rapela R. Silva, Guilherme F. B. Lenz e |
author_sort | Bhatt, Aarti S. |
collection | PubMed |
description | Nanostructured NiO and Li-ion doped NiO have been synthesized via a facile microwave technique and simulated using the first principle method. The effects of microwaves on the morphology of the nanostructures have been studied by Field Emission Spectroscopy. X-ray diffraction studies confirm the nanosize of the particles and favoured orientations along the (111), (200) and (220) planes revealing the cubic structure. The optical band gap decreases from 3.3 eV (pure NiO) to 3.17 eV (NiO doped with 1% Li). Further, computational simulations have been performed to understand the optical behaviour of the synthesized nanoparticles. The optical properties of the doped materials exhibit violet, blue and green emissions, as evaluated using photoluminescence (PL) spectroscopy. In the presence of Li-ions, NiO nanoparticles exhibit enhanced electrical capacities and better cyclability. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results show that with 1% Li as dopant, there is a marked improvement in the reversibility and the conductance value of NiO. The results are encouraging as the synthesized nanoparticles stand a better chance of being used as an active material for electrochromic, electro-optic and supercapacitor applications. |
format | Online Article Text |
id | pubmed-7372403 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-73724032020-08-05 Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique Bhatt, Aarti S. Ranjitha, R. Santosh, M. S. Ravikumar, C. R. Prashantha, S. C. Maphanga, Rapela R. Silva, Guilherme F. B. Lenz e Materials (Basel) Article Nanostructured NiO and Li-ion doped NiO have been synthesized via a facile microwave technique and simulated using the first principle method. The effects of microwaves on the morphology of the nanostructures have been studied by Field Emission Spectroscopy. X-ray diffraction studies confirm the nanosize of the particles and favoured orientations along the (111), (200) and (220) planes revealing the cubic structure. The optical band gap decreases from 3.3 eV (pure NiO) to 3.17 eV (NiO doped with 1% Li). Further, computational simulations have been performed to understand the optical behaviour of the synthesized nanoparticles. The optical properties of the doped materials exhibit violet, blue and green emissions, as evaluated using photoluminescence (PL) spectroscopy. In the presence of Li-ions, NiO nanoparticles exhibit enhanced electrical capacities and better cyclability. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results show that with 1% Li as dopant, there is a marked improvement in the reversibility and the conductance value of NiO. The results are encouraging as the synthesized nanoparticles stand a better chance of being used as an active material for electrochromic, electro-optic and supercapacitor applications. MDPI 2020-07-02 /pmc/articles/PMC7372403/ /pubmed/32630747 http://dx.doi.org/10.3390/ma13132961 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Bhatt, Aarti S. Ranjitha, R. Santosh, M. S. Ravikumar, C. R. Prashantha, S. C. Maphanga, Rapela R. Silva, Guilherme F. B. Lenz e Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique |
title | Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique |
title_full | Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique |
title_fullStr | Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique |
title_full_unstemmed | Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique |
title_short | Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique |
title_sort | optical and electrochemical applications of li-doped nio nanostructures synthesized via facile microwave technique |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7372403/ https://www.ncbi.nlm.nih.gov/pubmed/32630747 http://dx.doi.org/10.3390/ma13132961 |
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