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المؤلفEid, Kamel
المؤلفSoliman, A. Khaled
المؤلفAbdulmalik, Dana
المؤلفMitoraj, Dariusz
المؤلفSleim, Mostafa H.
المؤلفLiedke, Maciej O.
المؤلفEl-Sayed, Hany A.
المؤلفAljaber, Amina S.
المؤلفAl-Qaradawi, Y. Ilham
المؤلفMendoza Reyes, Oliver
المؤلفAbdullah, Aboubakr M.
تاريخ الإتاحة2022-10-02T08:52:49Z
تاريخ النشر2020-02-07
اسم المنشورCatalysis Science and Technology
المعرّفhttp://dx.doi.org/10.1039/c9cy02366f
الاقتباسEid, K., Soliman, K. A., Abdulmalik, D., Mitoraj, D., Sleim, M. H., Liedke, M. O., ... & Abdullah, A. M. (2020). Tailored fabrication of iridium nanoparticle-sensitized titanium oxynitride nanotubes for solar-driven water splitting: experimental insights on the photocatalytic–activity–defects relationship. Catalysis Science & Technology, 10(3), 801-809.‏
الرقم المعياري الدولي للكتاب20444753
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85079777228&origin=inward
معرّف المصادر الموحدhttp://hdl.handle.net/10576/34697
الملخصUnderstanding the photocatalytic-activity-defects relationship of titanium oxynitride nanotubes (TiON-NTs) is important for tailoring their photocatalytic performance. Herein, we fabricated highly ordered and vertically aligned nanotube arrays of TiON-NT-functionalized with iridium nanoparticles denoted as (Ir/TiON-NTs) for solar-driven water splitting. Positron annihilation lifetime spectroscopy (PALS) and variable-energy positron annihilation spectroscopy (VEPAS) were performed to quantify the vacancy-type defects of Ir/TiON-NTs relative to TiON-NTs and TiO2-NTs. The results display that the Ir/TiON-NTs exhibit abundant defects such as small nitrogen vacancies, larger size vacancy clusters, and small voids. The obtained photocurrent density of the Ir/TiON-NTs (11.3 mA cm-2) is about 3.97, 5, and 11.89 times higher than that of Ir/TiO2-NTs, TiON-NTs, and TiO2-NTs, respectively. The Mott-Schottky analysis revealed the highest significant negative shift in the band potential and the lowest donor density of Ir/TiON-NTs compared to its counterparts. This result is attributed to the unique structural and compositional merits of Ir/TiON-NTs despite the abundant defects, which delay the charge recombination and improve the photocatalytic activity. The presented study may open new frontiers on engineering the defects of metal oxynitrides with metal-based catalysts for photocatalytic applications.
راعي المشروعThis work is made possible by NPRP Grant no. NPRP 7-485-1-091 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.
اللغةen
الناشرRoyal Society of Chemistry
الموضوعDefects
العنوانTailored fabrication of iridium nanoparticle-sensitized titanium oxynitride nanotubes for solar-driven water splitting: Experimental insights on the photocatalytic-activity-defects relationship
النوعArticle
الصفحات801-809
رقم العدد3
رقم المجلد10
dc.accessType Abstract Only


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