Synthesized Amorphous Silica mesoporous nanoparticles from agricultural wastes by sol-gel method

Subject Areas :

Erfan Aghashahi Ardestani ¹ , Syyed jamal Sheikh Zakariaei ² , mastaneh hajipour shirazi fard ³ , Behnam Mirshekari ⁴

1 - 1. Department of Petroleum Engineering, Faculty of Petroleum and Chemical Engineering, Science and Research Branch, Islamic Azad University (IAU), Tehran, Iran.
2 - Department of Petroleum Engineering, Faculty of Petroleum and Chemical Engineering, Science and Research Branch, Islamic Azad University (IAU), Tehran, Iran.
3 - استادیار دانشکده نفت و مهندسی شیمی دانشگاه آزاد اسلامی واحد علوم تحقیقات تهران
4 - استادیار دانشکده نفت و مهندسی شیمی، دانشگاه آزاد اسلامی، واحد علوم تحقیقات، تهران، ایران

Received: 2023-11-28 Accepted : 2024-03-07 Published : 2025-06-02

Keywords: ‎: Sol-gel, nanosilica, porous, amorphous, natural materials,

Abstract :

In recent decades, the demand for rice has increased. Therefore, a large amount of rice husks (RHs) is produced. Using RHs in industry can solve the problem of their disposal as waste and prevent environmental pollution. In this research, by using the sol-gel method, amorphous silica nanoparticles obtained from RHs with high efficiency. The synthesized nanoparticles had a higher specific surface area, reactivity, and activity than their conventional crystalline state. An array of analytical techniques was employed to assess the nanoparticles thoroughly, including X-ray diffraction (XRD), Furrier transform of infrared spectroscopy (FTIR), X-ray fluorescence (XRF), field emission scanning electron microscopy (FESEM), energy–dispersive spectroscopy (EDS), transmission electron microscopy (TEM), dynamic light scattering (DLS), BJH, and BET analyses. The results showed that nanoparticles had an amorphous phase and hydroxyl functional groups were placed on their surface. According to DLS analysis, the size distribution of synthesized nanoparticles varied from 5 to 40 nm, and their average size was approximately 14.6 nm. In addition, the results indicated that the purity and specific surface area (SSA) of the nanoparticles were 98.41% and 867 m²/g, respectively.

 

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