首页> 外文期刊>Journal of nanoparticle research: An interdisciplinary forum for nanoscale science and technology >Statistical evaluation of potential damage to the Al(OH) _3 layer on nTiO _2 particles in the presence of swimming pool and seawater
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Statistical evaluation of potential damage to the Al(OH) _3 layer on nTiO _2 particles in the presence of swimming pool and seawater

机译:在游泳池和海水存在下对nTiO _2颗粒上的Al(OH)_3层的潜在破坏的统计评估

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摘要

Nanosized TiO _2 particles (nTiO _2) are usually coated with an Al(OH) _3 layer when used in sunscreen to shield against the harmful effects of free radicals that are generated when these particles are exposed to UV radiation. Therefore, it is vital to insure the structural stability of these particles in the environment where the protective layer may be damaged and adverse health and environmental effects can occur. This study utilized X-ray analysis (SEM-EDS) to provide a qualitative and semi-quantitative assessment of the chemical and physical characteristics of Al(OH) _3-coated original and damaged nTiO _2 particles (used in sunscreen lotion formulations) in the presence of both swimming pool and seawater. Also, by utilizing statistical tools, a distribution of Al/Ti (%) on the particle surface was determined and evaluated. It was found that 45 min of treatment with swimming pool and seawater significantly induced the redistribution of Al/Ti (%), which changed the surface characteristics of particles and, therefore, may have induced undesired photo-activity and the consequent formation of free radicals.
机译:纳米级TiO _2粒子(nTiO _2)在用于防晒霜时通常会涂上Al(OH)_3层,以屏蔽这些粒子暴露于紫外线辐射时产生的自由基的有害影响。因此,至关重要的是确保这些颗粒在保护层可能受损的环境中的结构稳定性,并可能对健康和环境产生不利影响。这项研究利用X射线分析(SEM-EDS)对Al(OH)_3涂层的原始和损坏的nTiO _2颗粒(用于防晒乳液配方中)的化学和物理特性进行了定性和半定量评估。游泳池和海水都存在。另外,通过使用统计工具,确定和评估了颗粒表面上的Al / Ti(%)的分布。发现用游泳池和海水处理45分钟会明显地引起Al / Ti(%)的重新分布,从而改变了颗粒的表面特性,因此可能引起了不希望的光活性和自由基的形成。 。

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