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<p>In this study, nanostructured molybdenum disulfide (MoS<sub>2</sub>) with flower-like morphology was synthesized using a one-step hydrothermal method. To improve the electrochemical performance of MoS<sub>2</sub>, a MoS<sub>2</sub>/activated carbon (AC) composite was created through hydrothermal assembly, with AC sustainably sourced from Macamedia shells, offering a low-cost and eco-friendly carbon source. Structural and morphological characterizations—including powder X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM, TEM), nitrogen adsorption/desorption isotherms, and Raman spectroscopy—confirmed the formation of flower-like MoS<sub>2</sub> with a mixed 2H/1&#xa0;T phase and an increased surface area in the composite. The key innovation in this work is the synergistic combination of mixed-phase MoS<sub>2</sub> with biomass-derived AC, which effectively enhances electron transfer kinetics and provides active surface sites for electrochemical sensing. Based on this composite, a simple and rapid electroanalytical method was developed for the sensitive detection of salbutamol (SAL) utilizing a glassy carbon electrode (GCE) modified with MoS<sub>2</sub>/AC. The electrochemical behavior was examined using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) under optimized conditions. The MoS<sub>2</sub>/AC-GCE sensor showed a linear response to SAL in the concentration range of 0.5–6.3&#xa0;μM, with a detection limit of 0.32&#xa0;μM. The sensor also demonstrated good stability, repeatability, and reproducibility. Practical application was validated by accurately determining SAL in swine urine and pharmaceutical formulations, achieving satisfactory recoveries, thereby highlighting the potential of the proposed sensor as a reliable and cost-effective alternative for SAL monitoring in biological samples.</p>

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MoS2/activated carbon-modified electrode for electrochemical sensing of salbutamol

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Nguyen Quang Man,
  • Nguyen Van Hue,
  • Vo Thi Khanh Ly,
  • Nguyen Chi Bao,
  • Huynh Van Hien,
  • Do Mai Nguyen,
  • Nguyen Hai Phong,
  • Dinh Quang Khieu

摘要

In this study, nanostructured molybdenum disulfide (MoS2) with flower-like morphology was synthesized using a one-step hydrothermal method. To improve the electrochemical performance of MoS2, a MoS2/activated carbon (AC) composite was created through hydrothermal assembly, with AC sustainably sourced from Macamedia shells, offering a low-cost and eco-friendly carbon source. Structural and morphological characterizations—including powder X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM, TEM), nitrogen adsorption/desorption isotherms, and Raman spectroscopy—confirmed the formation of flower-like MoS2 with a mixed 2H/1 T phase and an increased surface area in the composite. The key innovation in this work is the synergistic combination of mixed-phase MoS2 with biomass-derived AC, which effectively enhances electron transfer kinetics and provides active surface sites for electrochemical sensing. Based on this composite, a simple and rapid electroanalytical method was developed for the sensitive detection of salbutamol (SAL) utilizing a glassy carbon electrode (GCE) modified with MoS2/AC. The electrochemical behavior was examined using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) under optimized conditions. The MoS2/AC-GCE sensor showed a linear response to SAL in the concentration range of 0.5–6.3 μM, with a detection limit of 0.32 μM. The sensor also demonstrated good stability, repeatability, and reproducibility. Practical application was validated by accurately determining SAL in swine urine and pharmaceutical formulations, achieving satisfactory recoveries, thereby highlighting the potential of the proposed sensor as a reliable and cost-effective alternative for SAL monitoring in biological samples.