Abstract
This master's thesis evaluates the performance of a dual single-atom Pt-Fe-g-C3N4 photocatalyst designed for the photocatalytic oxidation of nitric oxide (NO) under visible light irradiation. The photocatalyst was synthesized using an optimized molten salt method, followed by impregnation with platinum (Pt) and iron (Fe) precursors. Characterization techniques confirmed the successful and structurally intact incorporation of Pt and Fe single atoms within the g-C3N4 crystalline matrix.The photocatalytic performance of the Pt-Fe-g-C3N4 photocatalyst was assessed in a continuous flow reactor system under visible light, demonstrating superior activity for NO oxidation compared to both pristine g-C3N4. The photocatalyst exhibited a maximum NO oxidation efficiency of 56 %. This enhanced efficiency is attributed to the synergistic effects of the dual single-atom configuration, which facilitates the separation and transfer of photo-generated electron-hole pairs, thereby improving the photoelectrochemical properties of the photocatalyst. Moreover, the photocatalyst exhibited remarkable stability, maintaining its efficiency over multiple reaction cycles while demonstrating high selectivity for nitrate (NO3 - ), which minimizes secondary pollution.
The significant contribution of this research lies in the implementation of a dual single atom strategy to construct a Pt-Fe-g-C3N4 photocatalyst, which has been experimentally validated for its exceptional efficiency in the photocatalytic oxidation of NO. This advancement not only enhances the photocatalytic performance of g-C3N4 but also paves the way for the development of new materials with improved efficiency and selectivity in pollutant degradation under visible light irradiation.
| Date of Award | 15 Jul 2025 |
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| Original language | English |
| Awarding Institution |
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| Supervisor | Jun He (Supervisor) & Abubakar Yusuf (Supervisor) |