Enhancing photocatalytic degradation of methylene blue by TiO2-CeO2 heterostructure under visible light irradiation
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https://doi.org/10.54939/1859-1043.j.mst.93.2024.99-105Keywords:
TiO2 nanoparticles; TiO2-CeO2 heterostructure; Methylene blue and photocatalytic degradation.Abstract
TiO2-CeO2 heterostructure was synthesized by a simple hydrothermal technique, with an average particle size of 21 nm, and high uniformity from the common precursors. For the characterization of the catalyst properties, the techniques of X-ray Diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR), and Transmission Electron Microscopes (TEM) were used. The TiO2-CeO2 heterostructure exhibited higher photocatalytic activity than TiO2 in the removal of methylene blue (MB) dye under visible light irradiation. The combination of TiO2-CeO2 facilitated electron pathways, creating favorable conditions for efficient separation of electron-hole pairs and enhancing the photocatalytic activity of the material. The TiO2-CeO2 heterostructure demonstrated rapid and highly efficient photodegradation of methylene blue, achieving an 89.79% removal rate after 120 minutes of irradiation. This performance, coupled with enhanced visible light utilization, suggests wide applications in the field of photocatalysis.
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