Turkish Journal of Chemistry




By doping of MoO3 to MoS2-E, MoO3/MoS2-E composite was produced to treat the antimony (Sb+5) from raw petrochemical industry wastewater. The effects of increasing MoO3/MoS2-E composite concentrations (0.01, 0.06, 0.50, 1.20, and 6 mg/L), times (5 min, 10 min, 20 min, 60 min, 80 min), and simulated sun light powers (2, 15, and 26 mW/m2) on the removal of Sb+5 was researched. According to X-ray diffraction (XRD), MoS2-E exhibited a pure hexagonal structure with peaks at 2θ data of 15.56, 33.78, 40.59, and 61.43 cm-1 while MoO3 peaks showed similar configuration with the orthorhombic stage. X-ray photoelectron spectroscopy (XPS) was used to analyze the chemical composition. After Sb+5 removal, the additional MoO3 peaks were determined at 680, 967, and 997 cm-1. XPS spectra showed that after an oxidation period, "MoS2-E" was generated. Binding energy analysis showed that Mo5+ ions were produced from the partial transformation of MoO3. The MoO3 exhibited a vertical stacking on the MoS2-E. The filtered MoS2-E graph and relevant fast Fourier transfer pictures showed octahedral phase containing a proton. Field emission scanning electron microscopy analysis results showed that nano MoO3 exhibited a nanobelt structure. The maximum 10 mg/L Sb+5 removal was 93% at 1.20 mg/L MoO3/MoS2-E composite concentration at pH = 9 after 20 min at 15 mW/m2 simulated sunlight power via photoelectrocatalysis while the maximum Sb+5 removal via adsorption was detected as 80% for the same operational conditions in unilluminated conditions.

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