Presentation Information
[25p-31B-9]Optimization of Au-BiFeO3 Nanocomposites for Superior Photocatalytic Degradation of Methylene Blue
〇JHENYANG WU1, Tomoyuki Kurioka1, Chun-Yi Chen1, Masato Sone1, Yung-Jung Hsu1,2, Satoshi Okamoto1,3, Tso-Fu Mark Chang1,3 (1.Tokyo Tech, 2.NYCU, 3.Sumitomo Chemical)
Keywords:
Photocatalytic Degradation,BiFeO3
This study focuses on the synthesis and characterization of Au-BiFeO3 nanocomposites for the photocatalytic degradation of methylene blue (MB) dye, a common pollutant in wastewater. Employing a hydrothermal method, we successfully synthesized nanocomposites with varied Au loadings of 0.5, 1.0, and 1.5 wt%. The morphological and structural properties of these nanocomposites were extensively characterized using High-Resolution Transmission Electron Microscopy (HRTEM), Transmission Electron Microscopy Energy-Dispersive X-ray Spectroscopy (TEM-EDS) mapping, and X-ray Diffraction (XRD) analysis. HRTEM confirmed the well-dispersed nature of Au nanoparticles on the BiFeO3 surface, while EDS mapping ensured the uniform distribution of elements, and XRD patterns verified the crystalline nature of the composites. Photocatalytic experiments demonstrated that the 1.0 wt% Au-BiFeO3 nanocomposite exhibited the highest degradation efficiency for MB dye among the variants. This optimal performance is attributed to the efficient electron-hole separation and the superior interaction between the photocatalyst and the dye, facilitated by the ideal Au loading. The reduced performance at lower and higher Au concentrations indicates a critical balance between active site availability and aggregation effects.