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Simultaneous Conduction and Valence Band Regulation of Indium-Based Quantum Dots for Efficient H(2) Photogeneration
Indium-based chalcogenide semiconductors have been served as the promising candidates for solar H(2) evolution reaction, however, the related studies are still in its infancy and the enhancement of efficiency remains a grand challenge. Here, we report that the photocatalytic H(2) evolution activity...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8146827/ https://www.ncbi.nlm.nih.gov/pubmed/33925794 http://dx.doi.org/10.3390/nano11051115 |
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author | Li, Xiu-Ping Huang, Rong-Jin Chen, Cong Li, Tianduo Gao, Yu-Ji |
author_facet | Li, Xiu-Ping Huang, Rong-Jin Chen, Cong Li, Tianduo Gao, Yu-Ji |
author_sort | Li, Xiu-Ping |
collection | PubMed |
description | Indium-based chalcogenide semiconductors have been served as the promising candidates for solar H(2) evolution reaction, however, the related studies are still in its infancy and the enhancement of efficiency remains a grand challenge. Here, we report that the photocatalytic H(2) evolution activity of quantized indium chalcogenide semiconductors could be dramatically aroused by the co-decoration of transition metal Zn and Cu. Different from the traditional metal ion doping strategies which only focus on narrowing bandgap for robust visible light harvesting, the conduction and valence band are coordinately regulated to realize the bandgap narrowing and the raising of thermodynamic driving force for proton reduction, simultaneously. Therefore, the as-prepared noble metal-free Cu(0.4)-ZnIn(2)S(4) quantum dots (QDs) exhibits extraordinary activity for photocatalytic H(2) evolution. Under optimal conditions, the Cu(0.4)-ZnIn(2)S(4) QDs could produce H(2) with the rate of 144.4 μmol h(−1) mg(−1), 480-fold and 6-fold higher than that of pristine In(2)S(3) QDs and Cu-doped In(2)S(3) QDs counterparts respectively, which is even comparable with the state-of-the-art cadmium chalcogenides QDs. |
format | Online Article Text |
id | pubmed-8146827 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-81468272021-05-26 Simultaneous Conduction and Valence Band Regulation of Indium-Based Quantum Dots for Efficient H(2) Photogeneration Li, Xiu-Ping Huang, Rong-Jin Chen, Cong Li, Tianduo Gao, Yu-Ji Nanomaterials (Basel) Article Indium-based chalcogenide semiconductors have been served as the promising candidates for solar H(2) evolution reaction, however, the related studies are still in its infancy and the enhancement of efficiency remains a grand challenge. Here, we report that the photocatalytic H(2) evolution activity of quantized indium chalcogenide semiconductors could be dramatically aroused by the co-decoration of transition metal Zn and Cu. Different from the traditional metal ion doping strategies which only focus on narrowing bandgap for robust visible light harvesting, the conduction and valence band are coordinately regulated to realize the bandgap narrowing and the raising of thermodynamic driving force for proton reduction, simultaneously. Therefore, the as-prepared noble metal-free Cu(0.4)-ZnIn(2)S(4) quantum dots (QDs) exhibits extraordinary activity for photocatalytic H(2) evolution. Under optimal conditions, the Cu(0.4)-ZnIn(2)S(4) QDs could produce H(2) with the rate of 144.4 μmol h(−1) mg(−1), 480-fold and 6-fold higher than that of pristine In(2)S(3) QDs and Cu-doped In(2)S(3) QDs counterparts respectively, which is even comparable with the state-of-the-art cadmium chalcogenides QDs. MDPI 2021-04-26 /pmc/articles/PMC8146827/ /pubmed/33925794 http://dx.doi.org/10.3390/nano11051115 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Li, Xiu-Ping Huang, Rong-Jin Chen, Cong Li, Tianduo Gao, Yu-Ji Simultaneous Conduction and Valence Band Regulation of Indium-Based Quantum Dots for Efficient H(2) Photogeneration |
title | Simultaneous Conduction and Valence Band Regulation of Indium-Based Quantum Dots for Efficient H(2) Photogeneration |
title_full | Simultaneous Conduction and Valence Band Regulation of Indium-Based Quantum Dots for Efficient H(2) Photogeneration |
title_fullStr | Simultaneous Conduction and Valence Band Regulation of Indium-Based Quantum Dots for Efficient H(2) Photogeneration |
title_full_unstemmed | Simultaneous Conduction and Valence Band Regulation of Indium-Based Quantum Dots for Efficient H(2) Photogeneration |
title_short | Simultaneous Conduction and Valence Band Regulation of Indium-Based Quantum Dots for Efficient H(2) Photogeneration |
title_sort | simultaneous conduction and valence band regulation of indium-based quantum dots for efficient h(2) photogeneration |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8146827/ https://www.ncbi.nlm.nih.gov/pubmed/33925794 http://dx.doi.org/10.3390/nano11051115 |
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