Plant-mediated synthesis of nanoparticles has already gained recognition as an efficient, environmentally friendly method due to its non-toxicity, low cost, and simple process. In this study, we have successfully fabricated Fe 3 O 4 /mesoporous silica nanoparticles (MSN) via green synthesis utilizing Moringa oleifera (MO) extract. X-ray diffraction analysis (XRD), Fourier transforms infrared (FTIR), and ultraviolet-visible spectroscopy (UV-Vis) were used to investigate the microstructural and optical characteristics of the green synthesized Fe 3 O 4 /MSN. Fe 3 O 4 and Fe 3 O 4 /MSN exhibit crystalline sharp peaks in their XRD patterns, whereas MSN has an amorphous structure. The crystallite size of Fe 3 O 4 nanoparticles decreased after adding the MSN. FTIR spectra verified the existence of the C-C aromatics ring, Fe-O vibration mode of Fe 3 O 4 , and Si-O-Si stretching vibration, indicating that the green synthesized Fe 3 O 4 /MSN had been successfully obtained. After adding MSN, the UV-Vis absorbance spectra of Fe 3 O 4 changed toward a lower wavelength, indicating that the electronic structure had changed, as revealed by the band gap energy decrease from 2.76 to 2.68 eV. Furthermore, these results proved that the surface modification using MSN on Fe 3 O 4 via green route using MO extract could control their microstructural and optical properties, indicating the green synthesized Fe 3 O 4 /MSN had potential for future applications.
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Saputra et al. (2024) studied this question.
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