چكيده به لاتين
In recent years, two-component composites of molybdenum sulfide and graphitic carbon nitride (MoS2/g-C3N4) have attracted significant attention from researchers due to their narrow bandgap and reduced electron-hole recombination, making them promising for applications in water purification, hydrogen and oxygen fuel production, solar cells, drug release, and more. In this study, g-C3N4 was synthesized via urea calcination at 550 degrees Celsius. MoS2 was synthesized using the hydrothermal method, and P+3, Bi+3, and Zr+4 ions were doped into its structure at mole percentages of 0.4, 0.4, and 0.3, respectively, in single, binary, and ternary forms. Subsequently, the two-component composites of MoS2 (pure samples and samples with dopants) / g-C3N4 were synthesized by combining these two components using the hydrothermal synthesis method. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), and ultraviolet-visible spectroscopy (UV-Vis) were used to analyze the properties related to the samples. The physical and chemical characterization revealed that the particle size and bandgap of the MoS2/g-C3N4 two-component composite, along with ternary cations P+3, Bi+3, and Zr+4, decreased from 1.5 µm and 1.72 eV for MoS2 to 0.14 µm and 1.68 eV, respectively. According to the results of the photocatalytic test, the MoS2/g-C3N4 two-component composite with ternary cations P+3, Bi+3, and Zr+4 doping in MoS2 could efficiently degrade 99.9% of methylene blue in 20 minutes under visible light with high stability. The high performance of these two composites is attributed to their sufficient bandgap, the formation of the bismuth sulfide phase as an electron trap, and their low recombination rate. In summary, the study demonstrates the potential of MoS2/g-C3N4 two-component composites, particularly when doped with ternary cations, for various applications due to their unique properties and enhanced photocatalytic performance.
