In this paper, inorganic silica microspheres with interconnected macroporosity are tested as a platform for designing robust and efficient photocatalytic systems for a continuous flow reactor, enabling a low cost and straightforward purification of wastewater through solar‐driven photocatalysis. The photocatalytically active microspheres are prepared by wet impregnation of porous silica scaffolds with Trizma‐functionalized anatase titania (TiO₂) nanoparticles (NPs). NPs loading of 22 wt% is obtained in the form of a thin and well‐attached layer, covering the external surface of the microspheres as well as the internal surface of the pores. The TiO₂ loading leads to an increase of the specific surface area by 26%, without impacting the typically interconnected macroporosity (≈60%) of the microspheres, which is essential for an efficient flow of the pollutant solution during the photocatalytic tests. These are carried out in a liquid medium for the decomposition of methyl orange and paracetamol. In addition to photocatalytic activity under continuous flow, the microspheres offer the advantage that they can be easily removed from the reaction medium, which is an appealing aspect for industrial applications. In this work, the typical issues of TiO₂ NPs photocatalysts are circumvented, without the need for elaborate chemistries, and for low availability and expensive raw materials.

中文翻译：

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具有固定二氧化钛纳米颗粒的多孔二氧化硅微球用于流式太阳能驱动的废水净化

在本文中，测试了具有互连大孔的无机二氧化硅微球作为为连续流反应器设计稳健且高效的光催化系统的平台，从而通过太阳能驱动的光催化实现低成本且直接的废水净化。光催化活性微球是通过用 Trizma 功能化锐钛矿二氧化钛 (TiO ₂ ) 纳米颗粒 (NP) 湿法浸渍多孔二氧化硅支架来制备的。22 wt% 的纳米粒子负载量以薄且附着良好的层的形式获得，覆盖微球的外表面以及孔的内表面。TiO _{2 的}负载导致比表面积增加了 26%，而不影响微球通常互连的大孔隙率（约60%），这对于光催化测试期间污染物溶液的有效流动至关重要。这些是在液体介质中进行的，用于分解甲基橙和扑热息痛。除了连续流动下的光催化活性外，微球还具有可以轻松从反应介质中去除的优点，这对于工业应用来说是一个有吸引力的方面。_{在这项工作中，TiO 2} NPs光催化剂的典型问题得到了解决，不需要复杂的化学反应，也不需要低可用性和昂贵的原材料。