Magnetic Iron Oxide Nanoneedles with Hierarchical Structure for Controllable Catalytic Activity of 4-Nitrophenol Reduction
Catalyst systems with high catalytic activity and sustainability are highly desirable. Here, we report a design for catalytic composites with a hierarchical structure in which polydopamine (PD), multi-metallic nanocatalysts and iron oxide nanoneedles are successively deposited on a magnetic core. PD...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/6/1037 |
| _version_ | 1797609821605724160 |
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| author | Hyokyung Jeon Ha-Jin Lee |
| author_facet | Hyokyung Jeon Ha-Jin Lee |
| author_sort | Hyokyung Jeon |
| collection | DOAJ |
| description | Catalyst systems with high catalytic activity and sustainability are highly desirable. Here, we report a design for catalytic composites with a hierarchical structure in which polydopamine (PD), multi-metallic nanocatalysts and iron oxide nanoneedles are successively deposited on a magnetic core. PD layers with various thicknesses are coated onto the magnetic core and serve as a template by which to take up multi-metallic nanocatalysts such as Au, Ag and Pt nanoparticles. The iron oxide nanoneedles act as spacers, preventing the nanocomposite from aggregating and increasing the surface area of the composite. The distinctive structures of the controllable template, the multi-metallic catalysts and needle-like layers enable the rapid migration of reactive ionic species and enhance catalytic ability via the synergistic effect of the multi-metallic nanocatalysts and iron oxide nanoneedles. Moreover, due to the strong magnetic property of the catalytic nanocomposites, they can be easily recovered with an external magnet and reused. Our hierarchical nanocomposites for recyclable nanocatalysts provide a new design concept for highly efficient catalysts. |
| first_indexed | 2024-03-11T06:05:45Z |
| format | Article |
| id | doaj.art-ff4f36b54b394ccb93797ef24cbc9f3f |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T06:05:45Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-ff4f36b54b394ccb93797ef24cbc9f3f2023-11-17T13:00:38ZengMDPI AGNanomaterials2079-49912023-03-01136103710.3390/nano13061037Magnetic Iron Oxide Nanoneedles with Hierarchical Structure for Controllable Catalytic Activity of 4-Nitrophenol ReductionHyokyung Jeon0Ha-Jin Lee1Western Seoul Center, Korea Basic Science Institute, 150 Bugahyun-ro, Seoudaemun-gu, Seoul 03759, Republic of KoreaDivision of Chemistry and Bio-Environmental Sciences, Seoul Women’s University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of KoreaCatalyst systems with high catalytic activity and sustainability are highly desirable. Here, we report a design for catalytic composites with a hierarchical structure in which polydopamine (PD), multi-metallic nanocatalysts and iron oxide nanoneedles are successively deposited on a magnetic core. PD layers with various thicknesses are coated onto the magnetic core and serve as a template by which to take up multi-metallic nanocatalysts such as Au, Ag and Pt nanoparticles. The iron oxide nanoneedles act as spacers, preventing the nanocomposite from aggregating and increasing the surface area of the composite. The distinctive structures of the controllable template, the multi-metallic catalysts and needle-like layers enable the rapid migration of reactive ionic species and enhance catalytic ability via the synergistic effect of the multi-metallic nanocatalysts and iron oxide nanoneedles. Moreover, due to the strong magnetic property of the catalytic nanocomposites, they can be easily recovered with an external magnet and reused. Our hierarchical nanocomposites for recyclable nanocatalysts provide a new design concept for highly efficient catalysts.https://www.mdpi.com/2079-4991/13/6/1037magnetic nanoparticlepolydopaminemulti-metallic nanoparticlesiron oxide nanoneedleshierarchical nanostructurecatalytic activity |
| spellingShingle | Hyokyung Jeon Ha-Jin Lee Magnetic Iron Oxide Nanoneedles with Hierarchical Structure for Controllable Catalytic Activity of 4-Nitrophenol Reduction Nanomaterials magnetic nanoparticle polydopamine multi-metallic nanoparticles iron oxide nanoneedles hierarchical nanostructure catalytic activity |
| title | Magnetic Iron Oxide Nanoneedles with Hierarchical Structure for Controllable Catalytic Activity of 4-Nitrophenol Reduction |
| title_full | Magnetic Iron Oxide Nanoneedles with Hierarchical Structure for Controllable Catalytic Activity of 4-Nitrophenol Reduction |
| title_fullStr | Magnetic Iron Oxide Nanoneedles with Hierarchical Structure for Controllable Catalytic Activity of 4-Nitrophenol Reduction |
| title_full_unstemmed | Magnetic Iron Oxide Nanoneedles with Hierarchical Structure for Controllable Catalytic Activity of 4-Nitrophenol Reduction |
| title_short | Magnetic Iron Oxide Nanoneedles with Hierarchical Structure for Controllable Catalytic Activity of 4-Nitrophenol Reduction |
| title_sort | magnetic iron oxide nanoneedles with hierarchical structure for controllable catalytic activity of 4 nitrophenol reduction |
| topic | magnetic nanoparticle polydopamine multi-metallic nanoparticles iron oxide nanoneedles hierarchical nanostructure catalytic activity |
| url | https://www.mdpi.com/2079-4991/13/6/1037 |
| work_keys_str_mv | AT hyokyungjeon magneticironoxidenanoneedleswithhierarchicalstructureforcontrollablecatalyticactivityof4nitrophenolreduction AT hajinlee magneticironoxidenanoneedleswithhierarchicalstructureforcontrollablecatalyticactivityof4nitrophenolreduction |