Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
Publication date: 11th July 2022
Materials and light sources are conditions of many factors to consider when designing an efficient photocatalyst for wastewater treatment. In this study, a Z-scheme was constructed by combining a UV-reactive material with a wide bandgap(3.2 eV) and a visible light-reactive material with a relatively low bandgap(2.7 eV), and it was investigated whether the dye pollutants are efficiently degraded under UV and visible light reactions(A mercury lamp is used as the UV light source, and a halogen lamp is used as the visible light source). A photocatalytic degradation performance investigation on two well-known dye pollutants, Rhodamine B(RhB) and indigo carmine(IC), was performed, and both dyes demonstrated effective photocatalytic degradation in UV and visible light. Different mechanisms are suggested based on the light source by comparing the photocatalytic activity and photocatalyst surfaces reactive species{Superoxide radical and Peroxy Radical(benzoquinone), hole(ammonium oxalate), and hydroxyl radical(2-propanol)} of UV and visible light and the relative hydroxyl radical generation rate.
This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education(2021R1I1A1A01049258)
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