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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...

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Autores principales: Li, Xiu-Ping, Huang, Rong-Jin, Chen, Cong, Li, Tianduo, Gao, Yu-Ji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
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.
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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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