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Sol–gel synthesis of Al-doped TiO2 nanoparticles as UV filters with diminished photocatalytic activity for the application in sunscreen products.
- Source :
- Journal of Sol-Gel Science & Technology; Dec2023, Vol. 108 Issue 3, p900-911, 12p
- Publication Year :
- 2023
-
Abstract
- Al-doped TiO<subscript>2</subscript> nanoparticles with different Al contents were prepared by a simple sol–gel method and were applied as UV filters for sunscreen products. These materials were characterized by XRD, Raman, FESEM, N<subscript>2</subscript> adsorption-desorption, WDXRF, FTIR, and UV–visible diffuse reflectance spectroscopy. Their color and photocatalytic activity were evaluated through CIE L*a*b* colorimetric method and the degradation of methylene blue under UV light, respectively. According to the results, the insertion of Al<superscript>3+</superscript> ions into TiO<subscript>2</subscript> successfully reduced the photocatalytic performance via the decrease in the mass fraction of rutile phase, the decrease in surface hydroxyl groups, and the increase in dislocation density. These Al-doped powders display better UV absorption than the undoped TiO<subscript>2</subscript>, which can be attributed to the increase in anatase content and the decrease in particle size due to Al-doping. Consequently, the sunscreen using 4 mol% Al-doped TiO<subscript>2</subscript> reveals the enhanced SPF value and improved color stability, which are suitable for UV protection cosmetics. Highlights: Preparation of Al-doped TiO<subscript>2</subscript> nanoparticles by sol-gel method. Al-doping successfully reduces the photocatalytic activity of TiO<subscript>2</subscript>. Al-doped TiO<subscript>2</subscript> nanoparticles show high UV absorption and bright ivory-white color. Sunscreen using Al-doped TiO<subscript>2</subscript> display high SPF values and high color stability. Al-doped TiO<subscript>2</subscript> nanoparticles can be safety used as UV filters in sunscreens. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09280707
- Volume :
- 108
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Sol-Gel Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 173493296
- Full Text :
- https://doi.org/10.1007/s10971-023-06191-x