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Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique
- Source :
- Materials, Materials, Vol 13, Iss 2961, p 2961 (2020), Volume 13, Issue 13
- Publication Year :
- 2020
-
Abstract
- 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.
- Subjects :
- Photoluminescence
Materials science
Nanoparticle
lcsh:Technology
Article
microwave synthesis
electrochemical measurements
General Materials Science
lcsh:Microscopy
lcsh:QC120-168.85
lcsh:QH201-278.5
Dopant
lcsh:T
Non-blocking I/O
Doping
computational simulation
Dielectric spectroscopy
Chemical engineering
lcsh:TA1-2040
Electrochromism
Li-doped NiO
lcsh:Descriptive and experimental mechanics
photoluminescence
lcsh:Electrical engineering. Electronics. Nuclear engineering
Cyclic voltammetry
lcsh:Engineering (General). Civil engineering (General)
lcsh:TK1-9971
Subjects
Details
- ISSN :
- 19961944
- Volume :
- 13
- Issue :
- 13
- Database :
- OpenAIRE
- Journal :
- Materials (Basel, Switzerland)
- Accession number :
- edsair.doi.dedup.....d9bba37f629479e8ee6d04064a01ef39