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Description:

Tungsten oxide (WO3) is known for its photochromic properties, making it useful for smart windows, displays, and sensors. However, its small bandgap leads to rapid recombination of electron–hole pairs, resulting in poor photochromic performance. This study aims to enhance the photochromic properties of WO3 by synthesizing hexagonal tungsten oxide via hydrothermal synthesis, which increases surface area and internal hydrates. Titanium oxide (TiO2) was adsorbed onto the tungsten oxide to inject additional charges and reduce electron–hole recombination. Additionally, polyvinylpyrrolidone (PVP) was used to improve dispersion in organic solvents, allowing for the fabrication of high-quality films using the doctor blade method. Characterization confirmed the enhanced surface area, crystal structure, and dispersion stability. Reflectance and transmittance measurements demonstrated significant improvements in photochromic properties due to the composite structure. These findings suggest that the introduction of TiO2 and PVP to tungsten oxide effectively enhances its photochromic performance, broadening its applicability in various advanced photochromic applications.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: tungsten oxide nanoparticles, hybrid composite, dispersibility, photochromic property

Date published: 2024-06-29

Publisher: MDPI AG

Journal:

• Nanomaterials (ISSN: 20794991) vol. 14 issue. 13 1121

Funding:

• Ministry of Trade, Industry and Energy 20010838

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.3390/nano14131121

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Updated at: 2024-08-29 08:30:27 +0900

Published on MDR: 2024-08-29 08:30:27 +0900