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Green biomediated synthesis of anodized WO3 nanocatalysts using Melia azedarach leaves extract for the energetic transition: Solar hydrogen and Li-ion batteries

This study reports the bio-mediated synthesis of tungsten trioxide nanostructures from aqueous extracts of Melia azedarach (L.) dry leaves. The synthesis was carried out by electrochemical anodization of tungsten foils in the presence of different volume percentages of leaves extracts. These nanostr...

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Bibliographic Details
Published in:Journal of alloys and compounds 2024-08, Vol.995, p.174845, Article 174845
Main Authors: Fernández-Domene, Ramón M., Solsona, Benjamin, Erans, María, Blasco-Tamarit, Encarna, Sánchez-Tovar, Rita
Format: Article
Language:English
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Summary:This study reports the bio-mediated synthesis of tungsten trioxide nanostructures from aqueous extracts of Melia azedarach (L.) dry leaves. The synthesis was carried out by electrochemical anodization of tungsten foils in the presence of different volume percentages of leaves extracts. These nanostructures were afterwards completely characterized by Field-Emission Scanning Electron Microscopy (FESEM), X-Ray Diffraction (XRD), High-Resolution Transmission Electron Microscopy (HR-TEM), impedance measurements, linear sweep voltammetry in the presence of simulated solar light and UV-Vis spectroscopy. Finally, these nanoelectrodes were used as (photo)electrocatalysts in the photoelectrochemical water splitting process to obtain green hydrogen and as anodes in Li-ion rechargeable batteries. Nanostructures fabricated with 5% M. azedarach leaves extract provided the best (photo)electrocatalytic behavior for both applications, since in that biogenic electrolyte, thin nanorods arranged in very porous and spongy layers were formed. Therefore, the significant increase in specific surface area found for nanostructures fabricated following this green route, in comparison with the blank sample (i.e., nanostructure formed following a non-green route), was essential to enhance their performance as promising efficient (photo)electrocatalysts. •WO3 nanostructures were obtained using biogenic entities.•M. azedarach leaves extracts were used as anodization electrolyte.•At extract percentage of 5% very small nanorods were formed.•WO3 nanorods worked excellently as photoelectrocatalysts for water splitting.•WO3 nanorods had high specific capacities and good cyclability in Li-ion batteries.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2024.174845