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<p>This study focused on fabricating magnesium oxide (MgO) nanofibers using electrostatic spinning, followed by calcination at 300, 400, 500, 600, and 700&#xa0;°C. The primary objective was to examine how calcination temperature impacts the surface morphology, microstructure, phase purity, and adsorption efficiency of the MgO nanofibers. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses revealed that the fibers calcined at 500&#xa0;°C displayed improved porous architecture, characterized by a rough surface texture and enlarged pores, significantly improving their adsorptive capabilities. Furthermore, x-ray Diffraction (XRD) analysis confirmed that the fibers calcined at 500&#xa0;°C had the highest degree of crystallinity, as evidenced by a prominent diffraction peak corresponding to the (200) plane. Experimental evaluations using methylene blue (MB) dye as a model contaminant showed that MgO fibers calcined at 500&#xa0;°C achieved a maximum MB removal efficiency of 52.52% within 90 minutes, corresponding to an adsorption capacity of 43.11&#xa0;mg/g. Furthermore, the adsorption isotherm data were best described by the Langmuir model (<i>R</i><sup>2</sup> = 0.991), suggesting monolayer chemisorption at the fiber surface. These findings highlight the optimal calcination temperature of 500&#xa0;°C for synthesizing MgO nanofibers with maximized surface area and improved adsorption performance, making them strong candidates for wastewater treatment and environmental remediation applications.</p>

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Preparation of Nano-sized Magnesium Oxide by Electrospinning Technique and Its Adsorbability to Methylene Blue

  • 期刊论文

  • 发表日期：

    2025年2月13日

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  • Zhiru Zhao,
  • Quanqing Zhang,
  • Xiaohang Zhu,
  • Wei Zheng,
  • Weina Han,
  • Lijie He

摘要

This study focused on fabricating magnesium oxide (MgO) nanofibers using electrostatic spinning, followed by calcination at 300, 400, 500, 600, and 700 °C. The primary objective was to examine how calcination temperature impacts the surface morphology, microstructure, phase purity, and adsorption efficiency of the MgO nanofibers. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses revealed that the fibers calcined at 500 °C displayed improved porous architecture, characterized by a rough surface texture and enlarged pores, significantly improving their adsorptive capabilities. Furthermore, x-ray Diffraction (XRD) analysis confirmed that the fibers calcined at 500 °C had the highest degree of crystallinity, as evidenced by a prominent diffraction peak corresponding to the (200) plane. Experimental evaluations using methylene blue (MB) dye as a model contaminant showed that MgO fibers calcined at 500 °C achieved a maximum MB removal efficiency of 52.52% within 90 minutes, corresponding to an adsorption capacity of 43.11 mg/g. Furthermore, the adsorption isotherm data were best described by the Langmuir model (R2 = 0.991), suggesting monolayer chemisorption at the fiber surface. These findings highlight the optimal calcination temperature of 500 °C for synthesizing MgO nanofibers with maximized surface area and improved adsorption performance, making them strong candidates for wastewater treatment and environmental remediation applications.