The improvement of the photocatalytic performance of TiO₂ nanofibers (NFs), prepared by electrospinning, is achieved by surface modification with the rhodizonic acid (RhA). The condensation reaction between hydroxyl groups from TiO₂ NFs and RhA is accompanied by the red-shift of optical absorption due to interfacial charge transfer (ICT) complex formation. Crystal structure, morphology, and optical properties of unmodified and surface-modified TiO₂ NFs were analyzed. The photocatalytic performance of prepared samples has been examined through degradation of organic dye methylene blue. Superior photocatalytic activity of surface-modified TiO₂ NFs with RhA is attributed to their enhanced optical properties, i.e., the ability to harvest the photon energy in the visible spectral range.

中文翻译：

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罗丹宁酸增强表面改性TiO 2纳米纤维的光催化性能

通过电纺丝制备的TiO ₂纳米纤维（NFs）的光催化性能的改善是通过用Rhodizonic酸（RhA）进行表面改性实现的。由于界面电荷转移（ICT）配合物的形成，TiO ₂ NFs和RhA的羟基之间的缩合反应伴随着光吸收的红移。分析了未改性和表面改性的TiO ₂ NFs的晶体结构，形态和光学性质。已通过降解有机染料亚甲基蓝检查了制得的样品的光催化性能。表面改性的TiO _2的优异光催化活性 具有RhA的NF归因于其增强的光学特性，即在可见光谱范围内收集光子能量的能力。