Enhanced photocatalytic performance of WON@porous TiO2 nanofibers towards sunlight-assisted degradation of organic contaminants |
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| Authors: | Yahia H Ahmad Assem T Mohamed Mostafa H Sliem Aboubakr
M Abdullah Siham Y Al-Qaradawi |
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| Institution: | 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 |
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| Abstract: | In the last few decades, TiO2 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/TiO2 nanofibers (NFs) by integration of TiO2 nanofibers synthesized by electrospinning of a polymer solution containing a titanium(iv) butoxide precursor with WON nanoparticles fabricated via annealing of a WO3 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 TiO2/WO3 heterojunction.Coupling of WON with TiO2 nanofibers creates a novel heterojunction with enhanced photocatalytic activity. |
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