A novel photoanode based on Thorium oxide (ThO2) incorporated with graphitic Carbon nitride (g-C3N4) for Photoelectrochemical water splitting

Mohamed, Nurul Aida and Ismail, Aznan Fazli and Safaei, Javad and Johan, Mohd Rafie and Teridi, Mohd Asri Mat (2021) A novel photoanode based on Thorium oxide (ThO2) incorporated with graphitic Carbon nitride (g-C3N4) for Photoelectrochemical water splitting. Applied Surface Science, 569. ISSN 0169-4332, DOI https://doi.org/10.1016/j.apsusc.2021.151043.

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In this study, a new insight into the doping engineering with nuclear fuel (ThO2) was performed and applied in photoelectrochemical (PEC) water splitting. The successfully synthesized g-C3N4/ThO2 (-5.8%) via thermal treatment and g-C3N4 polymerization (precursor: Urea, 30 min; 520 C) manifested a remarkable and superior photocatalytic activity. The photocurrent density achieved for g-C3N4/ThO2 was 9.71 mu cm(-2) at 1.23 V vs. Ag/ AgCl under simulated light (100 mW/cm(2)) that is more than twice compared with the un-doped g-C3N4 (-4.23 mu A cm(-2)). The introduction of Thorium Nitrate during g-C3N4 polymerization altered the chemical bonding, structure, and morphology, with the improved PEC stability of the photoanode. Besides, doping with ThO2 increased the intensity of triazine and C-N bond in the g-C3N4 network, as observed by FT-IR analysis. The unique ``hollow cylindrical'' architecture also increased the surface area, light absorption, as well as the catalytic sites. The enhanced separation of photo-generated electron-hole pairs reduced the carrier recombination that was obviously probed via Photoluminescence spectra. Therefore, due to the photostability and the good performance, the g-C3N4/ThO2 composite can be envisioned as a potential candidate in the field of photocatalysis and prospectively be applied in PEC solar water splitting.

Item Type: Article
Funders: Universiti Malaya [DIP-2020-022], Universiti Malaya [GUP-2020-073], Universiti Malaya RU [001-2020], UKM Centre for Research and Instrumentation (CRIM)
Uncontrolled Keywords: Graphitic Carbon Nitride; Thorium Oxide; Doping; Thin film; Photoelectrochemical (PEC)
Subjects: T Technology > TP Chemical technology
Divisions: Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Apr 2022 03:37
Last Modified: 18 Apr 2022 02:46
URI: http://eprints.um.edu.my/id/eprint/26799

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