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<p>Mesoporous SiO<sub>2</sub> nanoparticles were synthesized using a modified Stöber method, resulting in spherical particles with an average diameter of 95 ± 5&#xa0;nm and rough surfaces, as confirmed by Scanning Electron Microscopy (SEM). Transmission Electron Microscopy (TEM) revealed evenly distributed pores on the surface. Nitrogen adsorption–desorption isotherms (type IV, typical of mesoporous materials) indicated a specific surface area of 47.18 m<sup>2</sup>/g, a pore volume of 0.127&#xa0;cc/g, and an average pore radius of 2.68&#xa0;nm, calculated using the Brunauer–Emmett–Teller (BET) and Barrett–Joyner–Halenda (BJH) methods. The nanoparticles can be sterilized by conventional laboratory procedures without loss of structural integrity, supporting their suitability for <i>in vitro</i> and <i>in vivo</i> applications. Furthermore, Atomic Force Microscopy (AFM) analysis demonstrated significant differences in surface roughness and area between unloaded SiO<sub>2</sub> nanoparticles and those loaded with FeSO<sub>4</sub>, highlighting the influence of metal incorporation and potential applications in biomedical and catalytic fields.</p> Graphical abstract <p></p>

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Surface characterization and potential applications of SiO2 mesoporous nanoparticles

  • 期刊论文

  • 发表日期：

    2026年1月29日

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  • Rodrigo Isaac Rojas-Jimenez,
  • Alejandro Muñoz-Diosdado,
  • Moisés Rubio-Osornio

摘要

Mesoporous SiO2 nanoparticles were synthesized using a modified Stöber method, resulting in spherical particles with an average diameter of 95 ± 5 nm and rough surfaces, as confirmed by Scanning Electron Microscopy (SEM). Transmission Electron Microscopy (TEM) revealed evenly distributed pores on the surface. Nitrogen adsorption–desorption isotherms (type IV, typical of mesoporous materials) indicated a specific surface area of 47.18 m2/g, a pore volume of 0.127 cc/g, and an average pore radius of 2.68 nm, calculated using the Brunauer–Emmett–Teller (BET) and Barrett–Joyner–Halenda (BJH) methods. The nanoparticles can be sterilized by conventional laboratory procedures without loss of structural integrity, supporting their suitability for in vitro and in vivo applications. Furthermore, Atomic Force Microscopy (AFM) analysis demonstrated significant differences in surface roughness and area between unloaded SiO2 nanoparticles and those loaded with FeSO4, highlighting the influence of metal incorporation and potential applications in biomedical and catalytic fields.

Graphical abstract