Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2
Fe3O4 nanoparticles (NPs) with a continuous and mesoporous silica (m-SiO2) shell were synthesized using a one-step method, sourcing silica from rice husk ash (RHA). The rice husk was thermally treated to obtain ash, from which silica was extracted as sodium silicate and precipitated by pH reduction....
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| Format: | Article |
| Language: | English |
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Iran University of Science & Technology
2024-12-01
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| Series: | Iranian Journal of Materials Science and Engineering |
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| Online Access: | http://ijmse.iust.ac.ir/article-1-3825-en.pdf |
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| author | Nazli Aharipour Adrine Malek khachatourian Ali Nemati |
| author_facet | Nazli Aharipour Adrine Malek khachatourian Ali Nemati |
| author_sort | Nazli Aharipour |
| collection | DOAJ |
| description | Fe3O4 nanoparticles (NPs) with a continuous and mesoporous silica (m-SiO2) shell were synthesized using a one-step method, sourcing silica from rice husk ash (RHA). The rice husk was thermally treated to obtain ash, from which silica was extracted as sodium silicate and precipitated by pH reduction. This silica powder, combined with iron chloride salts, facilitated the synthesis of the core-shell NPs. Mint extract acted as a capping agent to prevent agglomeration, and CTAB (cetyltrimethylammonium bromide) was used to create the porous SiO2 shell. X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) characterization investigated the structure, size, and shell formation. Coating integrity and suspension stability were assessed through Fourier transform infrared spectroscopy (FTIR) and dynamic light scattering (DLS). DLS analysis showed a relatively narrow particle size distribution with an average hydrodynamic size of 72.6 nm. Small-angle X-ray scattering (SAXS) provided insights into the meso- and nanoscale structure, while BET and nitrogen adsorption-desorption isotherms confirmed the mesoporous nature of the silica shell. Magnetization measurements showed superparamagnetic behavior, with specific magnetization values of 57.9 emu/g for Fe3O4 and 27.5 emu/g for Fe3O4@m-SiO2. These results confirm the successful synthesis of superparamagnetic magnetite NPs with a mesoporous silica coating from RHA. |
| format | Article |
| id | doaj-art-4c2433d7f11d454da34b4b1fda9eec9a |
| institution | OA Journals |
| issn | 1735-0808 2383-3882 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Iran University of Science & Technology |
| record_format | Article |
| series | Iranian Journal of Materials Science and Engineering |
| spelling | doaj-art-4c2433d7f11d454da34b4b1fda9eec9a2025-08-20T02:07:59ZengIran University of Science & TechnologyIranian Journal of Materials Science and Engineering1735-08082383-38822024-12-01214119128Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2Nazli Aharipour0Adrine Malek khachatourian1Ali Nemati2 Sharif University of Technology Sharif University of Technology Sharif University of Technology Fe3O4 nanoparticles (NPs) with a continuous and mesoporous silica (m-SiO2) shell were synthesized using a one-step method, sourcing silica from rice husk ash (RHA). The rice husk was thermally treated to obtain ash, from which silica was extracted as sodium silicate and precipitated by pH reduction. This silica powder, combined with iron chloride salts, facilitated the synthesis of the core-shell NPs. Mint extract acted as a capping agent to prevent agglomeration, and CTAB (cetyltrimethylammonium bromide) was used to create the porous SiO2 shell. X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) characterization investigated the structure, size, and shell formation. Coating integrity and suspension stability were assessed through Fourier transform infrared spectroscopy (FTIR) and dynamic light scattering (DLS). DLS analysis showed a relatively narrow particle size distribution with an average hydrodynamic size of 72.6 nm. Small-angle X-ray scattering (SAXS) provided insights into the meso- and nanoscale structure, while BET and nitrogen adsorption-desorption isotherms confirmed the mesoporous nature of the silica shell. Magnetization measurements showed superparamagnetic behavior, with specific magnetization values of 57.9 emu/g for Fe3O4 and 27.5 emu/g for Fe3O4@m-SiO2. These results confirm the successful synthesis of superparamagnetic magnetite NPs with a mesoporous silica coating from RHA.http://ijmse.iust.ac.ir/article-1-3825-en.pdfcore-shell nanoparticlesfe3o4porous sio2 shellrice husk ashsuperparamagnetic |
| spellingShingle | Nazli Aharipour Adrine Malek khachatourian Ali Nemati Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2 Iranian Journal of Materials Science and Engineering core-shell nanoparticles fe3o4 porous sio2 shell rice husk ash superparamagnetic |
| title | Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2 |
| title_full | Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2 |
| title_fullStr | Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2 |
| title_full_unstemmed | Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2 |
| title_short | Synthesis of Fe3O4@m-SiO2 Nanocomposites Using Rice Husk Ash Derived SiO2 |
| title_sort | synthesis of fe3o4 m sio2 nanocomposites using rice husk ash derived sio2 |
| topic | core-shell nanoparticles fe3o4 porous sio2 shell rice husk ash superparamagnetic |
| url | http://ijmse.iust.ac.ir/article-1-3825-en.pdf |
| work_keys_str_mv | AT nazliaharipour synthesisoffe3o4msio2nanocompositesusingricehuskashderivedsio2 AT adrinemalekkhachatourian synthesisoffe3o4msio2nanocompositesusingricehuskashderivedsio2 AT alinemati synthesisoffe3o4msio2nanocompositesusingricehuskashderivedsio2 |