Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites
Two tungsten disulfide (WS2)-based core-shell nanocomposites were fabricated using readily available reagents and simple procedures. The surface was pre-treated with a surfactant couple in a layer-by-layer approach, enabling good dispersion of the WS2 nanostructures in aqueous media and providing a...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-03-01
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| Series: | Nanomaterials |
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| Online Access: | http://www.mdpi.com/2079-4991/8/3/156 |
| _version_ | 1818957881408487424 |
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| author | Hagit Sade Jean-Paul Lellouche |
| author_facet | Hagit Sade Jean-Paul Lellouche |
| author_sort | Hagit Sade |
| collection | DOAJ |
| description | Two tungsten disulfide (WS2)-based core-shell nanocomposites were fabricated using readily available reagents and simple procedures. The surface was pre-treated with a surfactant couple in a layer-by-layer approach, enabling good dispersion of the WS2 nanostructures in aqueous media and providing a template for the polymerization of a silica (SiO2) shell. After a Stöber-like reaction, a conformal silica coating was achieved. Inspired by the resulting nanocomposite, a second one was prepared by reacting the surfactant-modified WS2 nanostructures with aniline and an oxidizing agent in an aqueous medium. Here too, a conformal coating of polyaniline (PANI) was obtained, giving a WS2@PANI nanocomposite. Both nanocomposites were analyzed by electron microscopy, energy dispersive X-ray spectroscopy (EDS) and FTIR, verifying the core-shell structure and the character of shells. The silica shell was amorphous and mesoporous and the surface area of the composite increases with shell thickness. Polyaniline shells slightly differ in their morphologies dependent on the acid used in the polymerization process and are amorphous like the silica shell. Electron paramagnetic resonance (EPR) spectroscopy of the WS2@PANI nanocomposite showed variation between bulk PANI and the PANI shell. These two nanocomposites have great potential to expand the use of transition metals dichalcogenides (TMDCs) for new applications in different fields. |
| first_indexed | 2024-12-20T11:16:54Z |
| format | Article |
| id | doaj.art-30e019aacfbb4f3bb1ff2a3bca8cc4ae |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-20T11:16:54Z |
| publishDate | 2018-03-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-30e019aacfbb4f3bb1ff2a3bca8cc4ae2022-12-21T19:42:36ZengMDPI AGNanomaterials2079-49912018-03-018315610.3390/nano8030156nano8030156Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell NanocompositesHagit Sade0Jean-Paul Lellouche1Institute of Nanotechnology and Advanced Materials & Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat Gan 5290002, IsraelInstitute of Nanotechnology and Advanced Materials & Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat Gan 5290002, IsraelTwo tungsten disulfide (WS2)-based core-shell nanocomposites were fabricated using readily available reagents and simple procedures. The surface was pre-treated with a surfactant couple in a layer-by-layer approach, enabling good dispersion of the WS2 nanostructures in aqueous media and providing a template for the polymerization of a silica (SiO2) shell. After a Stöber-like reaction, a conformal silica coating was achieved. Inspired by the resulting nanocomposite, a second one was prepared by reacting the surfactant-modified WS2 nanostructures with aniline and an oxidizing agent in an aqueous medium. Here too, a conformal coating of polyaniline (PANI) was obtained, giving a WS2@PANI nanocomposite. Both nanocomposites were analyzed by electron microscopy, energy dispersive X-ray spectroscopy (EDS) and FTIR, verifying the core-shell structure and the character of shells. The silica shell was amorphous and mesoporous and the surface area of the composite increases with shell thickness. Polyaniline shells slightly differ in their morphologies dependent on the acid used in the polymerization process and are amorphous like the silica shell. Electron paramagnetic resonance (EPR) spectroscopy of the WS2@PANI nanocomposite showed variation between bulk PANI and the PANI shell. These two nanocomposites have great potential to expand the use of transition metals dichalcogenides (TMDCs) for new applications in different fields.http://www.mdpi.com/2079-4991/8/3/156WS2functionalizationcore-shellpolyanilinesilica |
| spellingShingle | Hagit Sade Jean-Paul Lellouche Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites Nanomaterials WS2 functionalization core-shell polyaniline silica |
| title | Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites |
| title_full | Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites |
| title_fullStr | Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites |
| title_full_unstemmed | Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites |
| title_short | Preparation and Characterization of WS2@SiO2 and WS2@PANI Core-Shell Nanocomposites |
| title_sort | preparation and characterization of ws2 sio2 and ws2 pani core shell nanocomposites |
| topic | WS2 functionalization core-shell polyaniline silica |
| url | http://www.mdpi.com/2079-4991/8/3/156 |
| work_keys_str_mv | AT hagitsade preparationandcharacterizationofws2sio2andws2panicoreshellnanocomposites AT jeanpaullellouche preparationandcharacterizationofws2sio2andws2panicoreshellnanocomposites |