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<p>In this study, high-quality nanoselenium (quantitatively defined as monodisperse ~ 35&#xa0;nm particles, high crystallinity, 99.6% purity, and good colloidal/thermal stability) was successfully fabricated via a facile heterogeneous titration approach, using selenium powder as the precursor, an ethylenediamine–ethanethiol binary mixture as the reaction medium, and deionized water (DI water) as the titrant. The product was systematically characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), zeta potential analysis, dynamic light scattering, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and X-ray photoelectron spectroscopy (XPS) to reveal its morphology, crystal structure, surface chemistry, and thermal stability. The results demonstrated that the as-prepared nanoselenium featured an average particle size of 35&#xa0;nm (ascertained by TEM and XRD) and an average yield of 2.79 ± 0.01&#xa0;g (99.6%) based on triplicate experiments, exhibiting excellent performance with ultra-small particle size and high synthetic efficiency. Further investigation revealed that the synergistic effect between ethylenediamine (acting as both reaction medium and stabilizer) and ethanethiol (serving as a capping agent) efficiently regulated the nucleation and growth of selenium nanoparticles, which is crucial for the superior product performance. This work presents a straightforward yet highly efficient heterogeneous titration strategy for producing high-quality nanoselenium, laying a solid foundation for its future application-oriented research.</p>

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Facile heterogeneous titration synthesis of ultra-small, high-yield nanoselenium via an ethylenediamine-ethanethiol binary system

  • 期刊论文

  • 发表日期：

    2026年7月1日

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  • Jianhui Li,
  • Shaoling Zhuang

摘要

In this study, high-quality nanoselenium (quantitatively defined as monodisperse ~ 35 nm particles, high crystallinity, 99.6% purity, and good colloidal/thermal stability) was successfully fabricated via a facile heterogeneous titration approach, using selenium powder as the precursor, an ethylenediamine–ethanethiol binary mixture as the reaction medium, and deionized water (DI water) as the titrant. The product was systematically characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), zeta potential analysis, dynamic light scattering, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and X-ray photoelectron spectroscopy (XPS) to reveal its morphology, crystal structure, surface chemistry, and thermal stability. The results demonstrated that the as-prepared nanoselenium featured an average particle size of 35 nm (ascertained by TEM and XRD) and an average yield of 2.79 ± 0.01 g (99.6%) based on triplicate experiments, exhibiting excellent performance with ultra-small particle size and high synthetic efficiency. Further investigation revealed that the synergistic effect between ethylenediamine (acting as both reaction medium and stabilizer) and ethanethiol (serving as a capping agent) efficiently regulated the nucleation and growth of selenium nanoparticles, which is crucial for the superior product performance. This work presents a straightforward yet highly efficient heterogeneous titration strategy for producing high-quality nanoselenium, laying a solid foundation for its future application-oriented research.