Ahmad Yahia H, Mohamed Assem T, Sliem Mostafa H, Abdullah Aboubakr M, Al-Qaradawi Siham Y
Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University Doha 2713 Qatar
Center for Advanced Materials, Qatar University Doha 2713 Qatar.
RSC Adv. 2018 Sep 21;8(57):32747-32755. doi: 10.1039/c8ra06477f. eCollection 2018 Sep 18.
In the last few decades, TiO has been widely used in different types of photocatalytic applications. However, the relatively large optical band gap (∼3.2 eV), low charge carrier mobility and consequently its low quantum efficiency limit its photocatalytic activity. Herein, we construct a novel nanostructured heterojunction of WON/TiO nanofibers (NFs) by integration of TiO nanofibers synthesized by electrospinning of a polymer solution containing a titanium(iv) butoxide precursor with WON nanoparticles fabricated annealing of a WO precursor in dry ammonia at 700 °C. The synthesized photocatalysts were characterized using different spectroscopic techniques. Their photocatalytic performance towards the degradation of methyl orange, methylene blue, and phenol as model contaminants was investigated and the charge transfer process was elucidated and compared to that of a TiO/WO heterojunction.
在过去几十年中，二氧化钛（TiO）已广泛应用于不同类型的光催化应用中。然而，相对较大的光学带隙（约3.2电子伏特）、低电荷载流子迁移率以及由此导致的低量子效率限制了其光催化活性。在此，我们通过将含有丁氧基钛前驱体的聚合物溶液静电纺丝合成的TiO纳米纤维与在700℃干氨中对WO前驱体进行退火制备的WON纳米颗粒相结合，构建了一种新型的WON/TiO纳米纤维（NFs）纳米结构异质结。使用不同的光谱技术对合成的光催化剂进行了表征。研究了它们对作为模型污染物的甲基橙、亚甲基蓝和苯酚降解的光催化性能，阐明了电荷转移过程，并与TiO/WO异质结进行了比较。
