Preparation of Heterojunctions Based on Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Nanocrystals and g-C<sub>3</sub>N<sub>4</sub> Nanosheets for Photocatalytic Hydrogen Evolution
Heterojunctions based on metal halide perovskites (MHPs) are promising systems for the photocatalytic hydrogen evolution reaction (HER). In this work, we coupled Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> nanocrystals (NCs), obtained by wet ball milling synthesis,...
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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/2079-4991/13/2/263 |
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| author | María Medina-Llamas Andrea Speltini Antonella Profumo Francesca Panzarea Antonella Milella Francesco Fracassi Andrea Listorti Lorenzo Malavasi |
| author_facet | María Medina-Llamas Andrea Speltini Antonella Profumo Francesca Panzarea Antonella Milella Francesco Fracassi Andrea Listorti Lorenzo Malavasi |
| author_sort | María Medina-Llamas |
| collection | DOAJ |
| description | Heterojunctions based on metal halide perovskites (MHPs) are promising systems for the photocatalytic hydrogen evolution reaction (HER). In this work, we coupled Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> nanocrystals (NCs), obtained by wet ball milling synthesis, with g-C<sub>3</sub>N<sub>4</sub> nanosheets (NSs), produced by thermal oxidation of bulk g-C<sub>3</sub>N<sub>4,</sub> in air. These methods are reproducible, inexpensive and easy to scale up. Heterojunctions with different loadings of Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> NCs were fully characterised and tested for the HER. A relevant improvement of H<sub>2</sub> production with respect to pristine carbon nitride was achieved at low NCs levels reaching values up to about 4600 µmol g<sup>−1</sup> h<sup>−1</sup>. This work aims to provide insights into the synthesis of inexpensive and high-performing heterojunctions using MHP for photocatalytic applications. |
| first_indexed | 2024-03-09T11:33:50Z |
| format | Article |
| id | doaj.art-bd96f300a6dd41cf9c68593dcf80e1e6 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T11:33:50Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-bd96f300a6dd41cf9c68593dcf80e1e62023-11-30T23:47:24ZengMDPI AGNanomaterials2079-49912023-01-0113226310.3390/nano13020263Preparation of Heterojunctions Based on Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Nanocrystals and g-C<sub>3</sub>N<sub>4</sub> Nanosheets for Photocatalytic Hydrogen EvolutionMaría Medina-Llamas0Andrea Speltini1Antonella Profumo2Francesca Panzarea3Antonella Milella4Francesco Fracassi5Andrea Listorti6Lorenzo Malavasi7Unidad Académica Preparatoria, Plantel II, Universidad Autónoma de Zacatecas, Zacatecas 98068, MexicoDepartment of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, ItalyDepartment of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, ItalyDepartment of Chemistry, University of Bari “Aldo Moro” via Orabona 4, 70126 Bari, ItalyDepartment of Chemistry, University of Bari “Aldo Moro” via Orabona 4, 70126 Bari, ItalyDepartment of Chemistry, University of Bari “Aldo Moro” via Orabona 4, 70126 Bari, ItalyDepartment of Chemistry, University of Bari “Aldo Moro” via Orabona 4, 70126 Bari, ItalyDepartment of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, ItalyHeterojunctions based on metal halide perovskites (MHPs) are promising systems for the photocatalytic hydrogen evolution reaction (HER). In this work, we coupled Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> nanocrystals (NCs), obtained by wet ball milling synthesis, with g-C<sub>3</sub>N<sub>4</sub> nanosheets (NSs), produced by thermal oxidation of bulk g-C<sub>3</sub>N<sub>4,</sub> in air. These methods are reproducible, inexpensive and easy to scale up. Heterojunctions with different loadings of Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> NCs were fully characterised and tested for the HER. A relevant improvement of H<sub>2</sub> production with respect to pristine carbon nitride was achieved at low NCs levels reaching values up to about 4600 µmol g<sup>−1</sup> h<sup>−1</sup>. This work aims to provide insights into the synthesis of inexpensive and high-performing heterojunctions using MHP for photocatalytic applications.https://www.mdpi.com/2079-4991/13/2/263lead-free perovskiteshydrogen evolutionphotocatalysiscarbon nitrideperovskitesball milling |
| spellingShingle | María Medina-Llamas Andrea Speltini Antonella Profumo Francesca Panzarea Antonella Milella Francesco Fracassi Andrea Listorti Lorenzo Malavasi Preparation of Heterojunctions Based on Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Nanocrystals and g-C<sub>3</sub>N<sub>4</sub> Nanosheets for Photocatalytic Hydrogen Evolution Nanomaterials lead-free perovskites hydrogen evolution photocatalysis carbon nitride perovskites ball milling |
| title | Preparation of Heterojunctions Based on Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Nanocrystals and g-C<sub>3</sub>N<sub>4</sub> Nanosheets for Photocatalytic Hydrogen Evolution |
| title_full | Preparation of Heterojunctions Based on Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Nanocrystals and g-C<sub>3</sub>N<sub>4</sub> Nanosheets for Photocatalytic Hydrogen Evolution |
| title_fullStr | Preparation of Heterojunctions Based on Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Nanocrystals and g-C<sub>3</sub>N<sub>4</sub> Nanosheets for Photocatalytic Hydrogen Evolution |
| title_full_unstemmed | Preparation of Heterojunctions Based on Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Nanocrystals and g-C<sub>3</sub>N<sub>4</sub> Nanosheets for Photocatalytic Hydrogen Evolution |
| title_short | Preparation of Heterojunctions Based on Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> Nanocrystals and g-C<sub>3</sub>N<sub>4</sub> Nanosheets for Photocatalytic Hydrogen Evolution |
| title_sort | preparation of heterojunctions based on cs sub 3 sub bi sub 2 sub br sub 9 sub nanocrystals and g c sub 3 sub n sub 4 sub nanosheets for photocatalytic hydrogen evolution |
| topic | lead-free perovskites hydrogen evolution photocatalysis carbon nitride perovskites ball milling |
| url | https://www.mdpi.com/2079-4991/13/2/263 |
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