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<p>MoS<sub>2</sub>/TiO<sub>2</sub> (MoS/T) nanocomposites with varying MoS<sub>2</sub> concentrations were produced using a high-energy ball milling process to investigate their structural, morphological, and photocatalytic characteristics. The XRD analysis confirmed that crystalline MoS<sub>2</sub> and rutile TiO<sub>2</sub> phases coexisted without any obvious impurities. The crystallites were between 25 and 44&#xa0;nm in size. Raman spectra of both components showed distinct vibrational modes, indicating the successful formation of heterostructures with more lattice disorder at higher MoS<sub>2</sub> concentrations. All samples exhibited a noticeable absorption edge below 420&#xa0;nm in the MoS/T nanocomposites’ UV–visible absorption spectra. 3.28–2.75&#xa0;eV was the range of the optical bandgap (<i>E</i><sub><i>g</i></sub>). Through the UV-assisted degradation of methylene blue dye, photocatalytic activity was assessed; the MoS/T_5 sample had the best degradation efficiency (~ 88.5% in 120&#xa0;min). The deterioration followed pseudo-first-order kinetics, according to kinetic studies. The results demonstrate enhanced light absorption and improved photocatalytic activity arising from effective interfacial interaction between MoS<sub>2</sub> and TiO<sub>2</sub>, highlighting the significance of heterojunction engineering for photocatalytic performance enhancement.</p>

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The impact of MoS2 concentrations on the structural, optical, and photocatalytic performance of MoS2/TiO2 nanocomposites made by ball milling

  • 期刊论文

  • 发表日期：

    2026年4月14日

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  • Hasna Abdullah Alali

摘要

MoS2/TiO2 (MoS/T) nanocomposites with varying MoS2 concentrations were produced using a high-energy ball milling process to investigate their structural, morphological, and photocatalytic characteristics. The XRD analysis confirmed that crystalline MoS2 and rutile TiO2 phases coexisted without any obvious impurities. The crystallites were between 25 and 44 nm in size. Raman spectra of both components showed distinct vibrational modes, indicating the successful formation of heterostructures with more lattice disorder at higher MoS2 concentrations. All samples exhibited a noticeable absorption edge below 420 nm in the MoS/T nanocomposites’ UV–visible absorption spectra. 3.28–2.75 eV was the range of the optical bandgap (Eg). Through the UV-assisted degradation of methylene blue dye, photocatalytic activity was assessed; the MoS/T_5 sample had the best degradation efficiency (~ 88.5% in 120 min). The deterioration followed pseudo-first-order kinetics, according to kinetic studies. The results demonstrate enhanced light absorption and improved photocatalytic activity arising from effective interfacial interaction between MoS2 and TiO2, highlighting the significance of heterojunction engineering for photocatalytic performance enhancement.