Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1
Abstract Synthesis of core–shell nanostructures with magnetic core and zeolitic shell is an ongoing challenge. Herein, a strategy is presented for preparation of γ‐Fe2O3@mesoporous silica (mSiO2) core–shell nanoparticles containing ultrasmall domains of silicalite‐1 in the shell (γ‐Fe2O3@mSiO2/silic...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-02-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202201961 |
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| author | Diógenes Honorato Piva Roger Honorato Piva Sajjad Ghojavand Alain Pautrat Maxime Debost Ernesto A. Urquieta‐González Svetlana Mintova |
| author_facet | Diógenes Honorato Piva Roger Honorato Piva Sajjad Ghojavand Alain Pautrat Maxime Debost Ernesto A. Urquieta‐González Svetlana Mintova |
| author_sort | Diógenes Honorato Piva |
| collection | DOAJ |
| description | Abstract Synthesis of core–shell nanostructures with magnetic core and zeolitic shell is an ongoing challenge. Herein, a strategy is presented for preparation of γ‐Fe2O3@mesoporous silica (mSiO2) core–shell nanoparticles containing ultrasmall domains of silicalite‐1 in the shell (γ‐Fe2O3@mSiO2/silicalite‐1). The strategy consists in a solid‐state reorganization of the precursor amorphous mSiO2 shell into silicalite‐1 using a tetrapropylammonium hydroxide (TPAOH) as an organic structure‐directing agent (OSDA) under mild hydrothermal (HT) conditions. The formation of silicalite‐1 crystalline domains is investigated through the detailed characterization of products obtained at different times of HT treatment by X‐ray diffraction (XRD), Raman spectroscopy, Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) with energy dispersive X‐ray spectroscopy (EDS), transmission electron microscopy (TEM), and nitrogen physisorption. By careful tuning the time of HT treatment, the γ‐Fe2O3@mSiO2/silicalite‐1 nanostructures are prepared. Benefitting from the unique mesopores/microporous structure formed, the γ‐Fe2O3@mSiO2/silicalite‐1 core–shell nanostructure shows superior adsorption capacity to remove aniline from aqueous solutions than the γ‐Fe2O3@mSiO2. Moreover, the γ‐Fe2O3@mSiO2/silicalite‐1 nanostructure is easily separated from aqueous solutions using magnetic separation technique within 1 min. |
| first_indexed | 2024-03-12T21:52:19Z |
| format | Article |
| id | doaj.art-82b7faf15ee74826bc3b9058f0d9765f |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-03-12T21:52:19Z |
| publishDate | 2023-02-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-82b7faf15ee74826bc3b9058f0d9765f2023-07-26T01:35:58ZengWiley-VCHAdvanced Materials Interfaces2196-73502023-02-01104n/an/a10.1002/admi.202201961Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1Diógenes Honorato Piva0Roger Honorato Piva1Sajjad Ghojavand2Alain Pautrat3Maxime Debost4Ernesto A. Urquieta‐González5Svetlana Mintova6Laboratoire Catalyse et Spectrochimie ENSICAEN Université de Caen Caen 14050 FranceScience and Technology Center for Energy and Sustainability Federal University of Recôncavo of Bahia Feira de Santana 44042‐280 BrazilLaboratoire Catalyse et Spectrochimie ENSICAEN Université de Caen Caen 14050 FranceLaboratoire CRISMAT CNRS UMR 6508 ENSICAEN Cedex 4 Caen F‐14050 FranceLaboratoire Catalyse et Spectrochimie ENSICAEN Université de Caen Caen 14050 FranceResearch Center on Advanced Materials and Energy Federal University of São Carlos São Carlos 13565‐905 BrazilLaboratoire Catalyse et Spectrochimie ENSICAEN Université de Caen Caen 14050 FranceAbstract Synthesis of core–shell nanostructures with magnetic core and zeolitic shell is an ongoing challenge. Herein, a strategy is presented for preparation of γ‐Fe2O3@mesoporous silica (mSiO2) core–shell nanoparticles containing ultrasmall domains of silicalite‐1 in the shell (γ‐Fe2O3@mSiO2/silicalite‐1). The strategy consists in a solid‐state reorganization of the precursor amorphous mSiO2 shell into silicalite‐1 using a tetrapropylammonium hydroxide (TPAOH) as an organic structure‐directing agent (OSDA) under mild hydrothermal (HT) conditions. The formation of silicalite‐1 crystalline domains is investigated through the detailed characterization of products obtained at different times of HT treatment by X‐ray diffraction (XRD), Raman spectroscopy, Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) with energy dispersive X‐ray spectroscopy (EDS), transmission electron microscopy (TEM), and nitrogen physisorption. By careful tuning the time of HT treatment, the γ‐Fe2O3@mSiO2/silicalite‐1 nanostructures are prepared. Benefitting from the unique mesopores/microporous structure formed, the γ‐Fe2O3@mSiO2/silicalite‐1 core–shell nanostructure shows superior adsorption capacity to remove aniline from aqueous solutions than the γ‐Fe2O3@mSiO2. Moreover, the γ‐Fe2O3@mSiO2/silicalite‐1 nanostructure is easily separated from aqueous solutions using magnetic separation technique within 1 min.https://doi.org/10.1002/admi.202201961adsorptioncore–shell nanostructurecrystallizationmagnetic propertieszeolite |
| spellingShingle | Diógenes Honorato Piva Roger Honorato Piva Sajjad Ghojavand Alain Pautrat Maxime Debost Ernesto A. Urquieta‐González Svetlana Mintova Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1 Advanced Materials Interfaces adsorption core–shell nanostructure crystallization magnetic properties zeolite |
| title | Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1 |
| title_full | Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1 |
| title_fullStr | Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1 |
| title_full_unstemmed | Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1 |
| title_short | Synthesis of Core–Shell Magnetic Nanoparticles Containing Ultrasmall Domains of Silicalite‐1 |
| title_sort | synthesis of core shell magnetic nanoparticles containing ultrasmall domains of silicalite 1 |
| topic | adsorption core–shell nanostructure crystallization magnetic properties zeolite |
| url | https://doi.org/10.1002/admi.202201961 |
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