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<p>This study aimed to synthesize hollow silica nanoparticles (HSSN) using the hard template based on recycled polystyrene (PS) with the presence of various amounts of cationic surfactant of cetyltrimethylammonium bromide (CTAB). The results of PS nanoparticle size and poly dispersity index determined by dynamic light scattering (DLS) showed that changing CTAB concentration had little effect. Increasing PS material concentration resulted in a gradual increase in nanoparticle distribution and size, with an average value from 191 to 423&#xa0;nm. A high concentration of CTAB increased the zeta potential of the nano PS solution with values ranging from 61 to 85&#xa0;mV. The highly positive zeta potential could ensure stability of the PS nanoparticle. In addition, the positive charge on the template could also facilitate the silica deposition on the PS surfaces. Transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy measurement results confirm that HSSN particles were successfully fabricated. CTAB could significantly improve the methylene blue (MB) adsorption capacity from 6.7 to 17.5 mg/g. Mesoporous structures could be detected and the surface area of HSSN could increase up to 325 m<sup>2</sup>/g by adding more CTAB to the PS template solution. However, the materials were incapable of loading KMnO<sub>4</sub>. CTAB played another role in altering the surface charge of HSSN and gave rise to KMnO<sub>4</sub> adsorption. The KMnO<sub>4</sub>-loaded-HSSN with balanced macro- and mesopores could provide a decrease in ethylene gas production during the ripening process of the banana. The result showed that the current materials could be potentially applied to fruit storage technologies.</p> Graphical Abstract <p></p>

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Effect of cationic surfactant on the fabrication of hollow spherical silica for ethylene scavenger application

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Ha Ngoc Giang,
  • Duc Van Tran,
  • Tuan Nguyen Anh Huynh

摘要

This study aimed to synthesize hollow silica nanoparticles (HSSN) using the hard template based on recycled polystyrene (PS) with the presence of various amounts of cationic surfactant of cetyltrimethylammonium bromide (CTAB). The results of PS nanoparticle size and poly dispersity index determined by dynamic light scattering (DLS) showed that changing CTAB concentration had little effect. Increasing PS material concentration resulted in a gradual increase in nanoparticle distribution and size, with an average value from 191 to 423 nm. A high concentration of CTAB increased the zeta potential of the nano PS solution with values ranging from 61 to 85 mV. The highly positive zeta potential could ensure stability of the PS nanoparticle. In addition, the positive charge on the template could also facilitate the silica deposition on the PS surfaces. Transmission electron microscopy (TEM) and Fourier transform infrared (FTIR) spectroscopy measurement results confirm that HSSN particles were successfully fabricated. CTAB could significantly improve the methylene blue (MB) adsorption capacity from 6.7 to 17.5 mg/g. Mesoporous structures could be detected and the surface area of HSSN could increase up to 325 m2/g by adding more CTAB to the PS template solution. However, the materials were incapable of loading KMnO4. CTAB played another role in altering the surface charge of HSSN and gave rise to KMnO4 adsorption. The KMnO4-loaded-HSSN with balanced macro- and mesopores could provide a decrease in ethylene gas production during the ripening process of the banana. The result showed that the current materials could be potentially applied to fruit storage technologies.

Graphical Abstract