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Enhanced Photocatalytic Performance of Surface-Modified TiO 2 Nanofibers with Rhodizonic Acid
Advanced Fiber Materials ( IF 17.2 ) Pub Date : 2020-04-23 , DOI: 10.1007/s42765-020-00037-9
Yijun Sun , Jackson Beja Mwandeje , Lodrick M. Wangatia , Fatemeh Zabihi , Jovan Nedeljković , Shengyuan Yang

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:

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。
更新日期:2020-04-23
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