A Novel Hydrothermal CdS with Enhanced Photocatalytic Activity and Photostability for Visible Light Hydrogenation of Azo Bond: Synthesis and Characterization
A good photocatalyst maximizes the absorption of excitation light while reducing the recombination of photogenerated carriers. Among visible light responsive materials, CdS has good carrier transport capacity; however, its photostability is poor and limits its use. Here, the synthesis of a new hydro...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/3/413 |
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| author | Martina Milani Michele Mazzanti Giuliana Magnacca Stefano Caramori Alessandra Molinari |
| author_facet | Martina Milani Michele Mazzanti Giuliana Magnacca Stefano Caramori Alessandra Molinari |
| author_sort | Martina Milani |
| collection | DOAJ |
| description | A good photocatalyst maximizes the absorption of excitation light while reducing the recombination of photogenerated carriers. Among visible light responsive materials, CdS has good carrier transport capacity; however, its photostability is poor and limits its use. Here, the synthesis of a new hydrothermal CdS is reported, and post-synthesis annealing determines crystal properties and spectroscopic characteristics. The introduction of sulfur vacancies as intra band gap states is the key factor for the enhancement of photocatalytic activity. In fact, by spectroscopic and photo-electrochemical experiments, we demonstrate that sulfur vacancies act as an electron sink, favoring the charge transfer process to methyl orange. In addition, the studied hydrothermal CdS is characterized by very high stability, thus enabling a visible-light active photocatalyst that is overall recyclable, stable and more efficient than the commercial benchmark. |
| first_indexed | 2024-03-11T09:32:42Z |
| format | Article |
| id | doaj.art-bed1288f8170406fa26966fd977f49e1 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T09:32:42Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-bed1288f8170406fa26966fd977f49e12023-11-16T17:34:21ZengMDPI AGNanomaterials2079-49912023-01-0113341310.3390/nano13030413A Novel Hydrothermal CdS with Enhanced Photocatalytic Activity and Photostability for Visible Light Hydrogenation of Azo Bond: Synthesis and CharacterizationMartina Milani0Michele Mazzanti1Giuliana Magnacca2Stefano Caramori3Alessandra Molinari4Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, ItalyDepartment of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, ItalyDepartment of Chemistry, University of Torino, Via P. Giuria 7, 10125 Torino, ItalyDepartment of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, ItalyDepartment of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, ItalyA good photocatalyst maximizes the absorption of excitation light while reducing the recombination of photogenerated carriers. Among visible light responsive materials, CdS has good carrier transport capacity; however, its photostability is poor and limits its use. Here, the synthesis of a new hydrothermal CdS is reported, and post-synthesis annealing determines crystal properties and spectroscopic characteristics. The introduction of sulfur vacancies as intra band gap states is the key factor for the enhancement of photocatalytic activity. In fact, by spectroscopic and photo-electrochemical experiments, we demonstrate that sulfur vacancies act as an electron sink, favoring the charge transfer process to methyl orange. In addition, the studied hydrothermal CdS is characterized by very high stability, thus enabling a visible-light active photocatalyst that is overall recyclable, stable and more efficient than the commercial benchmark.https://www.mdpi.com/2079-4991/13/3/413hydrothermal CdSphotocatalysisphotostabilityvisible lighthydrogenationazo bond |
| spellingShingle | Martina Milani Michele Mazzanti Giuliana Magnacca Stefano Caramori Alessandra Molinari A Novel Hydrothermal CdS with Enhanced Photocatalytic Activity and Photostability for Visible Light Hydrogenation of Azo Bond: Synthesis and Characterization Nanomaterials hydrothermal CdS photocatalysis photostability visible light hydrogenation azo bond |
| title | A Novel Hydrothermal CdS with Enhanced Photocatalytic Activity and Photostability for Visible Light Hydrogenation of Azo Bond: Synthesis and Characterization |
| title_full | A Novel Hydrothermal CdS with Enhanced Photocatalytic Activity and Photostability for Visible Light Hydrogenation of Azo Bond: Synthesis and Characterization |
| title_fullStr | A Novel Hydrothermal CdS with Enhanced Photocatalytic Activity and Photostability for Visible Light Hydrogenation of Azo Bond: Synthesis and Characterization |
| title_full_unstemmed | A Novel Hydrothermal CdS with Enhanced Photocatalytic Activity and Photostability for Visible Light Hydrogenation of Azo Bond: Synthesis and Characterization |
| title_short | A Novel Hydrothermal CdS with Enhanced Photocatalytic Activity and Photostability for Visible Light Hydrogenation of Azo Bond: Synthesis and Characterization |
| title_sort | novel hydrothermal cds with enhanced photocatalytic activity and photostability for visible light hydrogenation of azo bond synthesis and characterization |
| topic | hydrothermal CdS photocatalysis photostability visible light hydrogenation azo bond |
| url | https://www.mdpi.com/2079-4991/13/3/413 |
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