Al-Siani G., Kızıltaş H.
Journal of Brilliant Engineering (BEN), cilt.6, sa.3, ss.1-7, 2025 (Hakemli Dergi)
Özet
Methylene blue, an organic dye used in dyeing processes in the textile industry, has adverse effects on the ecosystem and human health. The use of catalysts is the most effective method for removing dyes from wastewater. Therefore, in this study, BiVO4, WO3, and the BiVO4/WO3/TiO2 composite were synthesized via hydrothermal methods. The catalysts were characterized using SEM-EDS, XRD, PL, and UV-Vis DRS techniques. XRD diffraction peaks revealed that the synthesized nanoparticles had a monoclinic phase. SEM images confirmed the spherical and rod-like morphology of the samples, while EDS analysis confirmed the presence of oxygen, tungsten, vanadium, bismuth, and titanium elements. PL analysis was performed between 300 and 800 nm to determine the recombination rate of the samples. The band gap values of the samples were determined by UV-Vis DRS analysis. According to the UV-DRS results, the Eg values of BiVO4, WO3, and the BiVO4/WO3/TiO2 composite were determined as 2.38, 2.54, and 2.31 eV, respectively. The photocatalytic activity of the catalysts was investigated by the degradation of methylene blue under UV irradiation. The results showed that BiVO4, WO3, and BiVO4/WO3/TiO2 composites removed 28.02%, 45.10%, and 61.080% of methylene blue dye under UV irradiation, respectively, and the BiVO4/WO3/TiO2 composite had a good degradation efficiency.