Environmental aging alters Al(OH)3 coating of TiO2 nanoparticles enhancing their photocatalytic and phototoxic activities
| العنوان: | Environmental aging alters Al(OH)3 coating of TiO2 nanoparticles enhancing their photocatalytic and phototoxic activities |
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| المؤلفون: | Kristin Childs, Jayna N. R. Ortenzio, Najwa Haykal Coates, Steve Diamond, Laura L. Degn, Souhail R. Al-Abed, Robert M. McCarrick, Jurate Virkutyte, William K. Boyes, Kevin L. Dreher, Hongbo Ma, Robert M. Zucker |
| المصدر: | Environmental Science: Nano. 3:593-601 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Reactive oxygen species, Materials science, Materials Science (miscellaneous), Radical, Tio2 nanoparticles, 02 engineering and technology, 010501 environmental sciences, engineering.material, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, Coating, chemistry, engineering, Photocatalysis, Environmental aging, Uva irradiation, 0210 nano-technology, Phototoxicity, 0105 earth and related environmental sciences, General Environmental Science |
| الوصف: | As a component of sunscreen formulations, TiO2 engineered nanomaterials (ENM) are coated to prevent reactive oxygen species from causing damage to skin. We investigated the stability of an Al(OH)3 coating by exposing 25 nm Al(OH)3·TiO2 ENM to simulated swimming pool water (SPW) for 45 minutes, 1, 3, 10, or 14 days. Electron microscopy and spectroscopy indicated that exposure to SPW caused a redistribution of the Al(OH)3 coating allowing photocatalytic formation of hydroxyl radicals. Aged ENM showed significantly greater phototoxicity under UVA irradiation than un-aged ENM in a human-derived retinal pigment epithelium cell line (ARPE-19). Photocatalytic activity and phototoxicity of aged Al(OH)3·TiO2 was significantly less than that of the positive control—uncoated P25 TiO2. In summary, the aging of Al(OH)3·TiO2 ENM in SPW redistributed the coating and reduced its protective properties, thereby increasing reactivity and potential phototoxicity. |
| تدمد: | 2051-8161 2051-8153 |
| DOI: | 10.1039/c5en00250h |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::f4619ff9129625a2b1aa4bcb3fd1889b https://doi.org/10.1039/c5en00250h |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........f4619ff9129625a2b1aa4bcb3fd1889b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20518161 20518153 |
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| DOI: | 10.1039/c5en00250h |