In recent years, the exploitation of natural resources and industrial development have led to the production of harmful pollutants. Much of these contaminants end up in water resources, reducing the availability of drinking water. Therefore, it is necessary to find remedies to this situation. Solutions could be the adsorption or the degradation through photocatalysis of these compounds. A good candidate for this task is titanium dioxide (TiO2), due to its non-toxicity, stability and low cost. In this work, we propose a novel synthesis of TiO2 nanoparticles (NPs), with high adsorption capacity, produced at low temperature in alkaline environment. Adsorption tests were conducted using methylene blue and diclofenac as model pollutants. Moreover, the obtained NPs have been characterized through Raman spectroscopy, Scanning and Transmission electron microscopies and with thermogravimetric analysis. The results showed a porous structure with a high surface area, able to efficiently adsorb large amounts of dye from the aqueous solution. These properties make the obtained TiO2 powders suitable for applications devoted to the adsorption and recovery of harmful compounds.

中文翻译：

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碱性溶胶中合成的多孔二氧化钛纳米粒子的吸附能力增强

近年来，自然资源的开采和工业的发展导致有害污染物的产生。这些污染物中的大部分最终都会进入水资源，从而减少了饮用水的供应。因此，有必要针对这种情况寻找补救措施。解决方案可能是通过这些化合物的光催化吸附或降解。由于二氧化钛 (TiO2) 无毒、稳定且成本低，因此该任务的一个很好的候选者是二氧化钛 (TiO2)。在这项工作中，我们提出了一种在碱性环境中低温生产的具有高吸附能力的 TiO2 纳米粒子 (NPs) 的新合成方法。使用亚甲蓝和双氯芬酸作为模型污染物进行吸附测试。此外，获得的纳米颗粒已通过拉曼光谱表征，扫描和透射电子显微镜和热重分析。结果表明具有高表面积的多孔结构能够有效地从水溶液中吸附大量染料。这些特性使所获得的 TiO2 粉末适用于专门用于吸附和回收有害化合物的应用。