Influence of ammonium fluoride concentration on the morphological, structural, optical and electrochemical properties of nanoporous WO3 films.
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| Title: | Influence of ammonium fluoride concentration on the morphological, structural, optical and electrochemical properties of nanoporous WO |
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| Authors: | Salem, Farhat M. Ali1 (AUTHOR), Kwong, Yam Fong1 (AUTHOR) yamfk@usm.my, Ooi, Mahayatun Dayana Johan1 (AUTHOR), Bououdina, Mohamed2 (AUTHOR) mbououdina@psu.edu.sa |
| Source: | Journal of Materials Science: Materials in Electronics. Jan2025, Vol. 36 Issue 1, p1-12. 12p. |
| Abstract: | This paper reports the synthesis and characterization of tungsten oxide by anodization method for 1 h using (1 M H2SO4, 1 M Na2SO4) electrolyte solution while varying NH4F concentration. The influence of NH4F concentration on structural, morphological, optical, and photocatalytic properties is examined. Scanning electron microscopy images show the formation of a thin layer with porous nanostructure attributed to the dissolution of anodic oxide by H+ and F− ions in the electrolyte under UV radiation of 365 nm. X-ray diffraction analysis reveals a mixed-phase crystal system of WO3, consisting of both monoclinic and tetragonal phases The crystallite size is found in the range 5.5‒18.2 nm with increasing NH4F concentration. UV–Vis spectroscopy analysis indicates a narrowing in the energy bandgap from 3.06 to 2.35 eV. Cyclic voltammetry manifests a decrease in the anodic peak current density with the rise in the concentration rate of NH4F. These findings extend a better understanding of the influence of NH4F concentration on the structural and electrochemical characteristics of the anodized nanoporous WO3 film as a potential candidate for hydrogen generation by the water-splitting process. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | This paper reports the synthesis and characterization of tungsten oxide by anodization method for 1 h using (1 M H2SO4, 1 M Na2SO4) electrolyte solution while varying NH4F concentration. The influence of NH4F concentration on structural, morphological, optical, and photocatalytic properties is examined. Scanning electron microscopy images show the formation of a thin layer with porous nanostructure attributed to the dissolution of anodic oxide by H+ and F− ions in the electrolyte under UV radiation of 365 nm. X-ray diffraction analysis reveals a mixed-phase crystal system of WO3, consisting of both monoclinic and tetragonal phases The crystallite size is found in the range 5.5‒18.2 nm with increasing NH4F concentration. UV–Vis spectroscopy analysis indicates a narrowing in the energy bandgap from 3.06 to 2.35 eV. Cyclic voltammetry manifests a decrease in the anodic peak current density with the rise in the concentration rate of NH4F. These findings extend a better understanding of the influence of NH4F concentration on the structural and electrochemical characteristics of the anodized nanoporous WO3 film as a potential candidate for hydrogen generation by the water-splitting process. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 09574522 |
| DOI: | 10.1007/s10854-024-14018-w |
