Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation
We report one-step hydrothermal preparation of ZnS/ZnO hybrid nanowires consisting of well-distributed nanoparticle-heterojunctions that induce high activity for visible-light-driven H2 evolution even without any noble metal co-catalysts. During the growth process, the nanoparticulated ZnS nanowir...
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sg-ntu-dr.10356-957572023-07-14T15:54:04Z Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation Wang, Zheng Cao, Shao-Wen Loo, Say Chye Joachim Xue, Can School of Materials Science & Engineering DRNTU::Engineering::Materials We report one-step hydrothermal preparation of ZnS/ZnO hybrid nanowires consisting of well-distributed nanoparticle-heterojunctions that induce high activity for visible-light-driven H2 evolution even without any noble metal co-catalysts. During the growth process, the nanoparticulated ZnS nanowires formed first, followed by ZnO nanocrystal growth with intercalation inside the ZnS nanowires. This growth mode 10 could result in enriched ZnS-surface-states on the ZnO nanocrystal surfaces, as evidenced by the weakened absorption features and quenched band gap emission of ZnO in the ZnS/ZnO hybrid nanowires. Further studies by varying the ZnS to ZnO ratio in the ZnS/ZnO hybrids also proved that the population of ZnS-surface-states is crucial to the visible-light activity for photocatalytic H2 evolution. This work provides a meaningful way to develop heterostructured composites as visible-light-active photocatalysts 15 by using wide band gap semiconductors for solar fuels production. MOE (Min. of Education, S’pore) NRF (Natl Research Foundation, S’pore) Accepted version 2013-06-11T07:34:48Z 2019-12-06T19:20:54Z 2013-06-11T07:34:48Z 2019-12-06T19:20:54Z 2013 2013 Journal Article Wang, Z., Cao, S. W., Loo, S. C. J., & Xue, C. (2013). Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation. CrystEngComm, 15(28), 5688-5693. https://hdl.handle.net/10356/95757 http://hdl.handle.net/10220/10197 10.1039/C3CE40523K 172279 en CrystEngComm © 2013 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by CrystEngComm, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1039/C3CE40523K]. application/pdf |
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DRNTU::Engineering::Materials Wang, Zheng Cao, Shao-Wen Loo, Say Chye Joachim Xue, Can Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation |
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We report one-step hydrothermal preparation of ZnS/ZnO hybrid nanowires consisting of well-distributed
nanoparticle-heterojunctions that induce high activity for visible-light-driven H2 evolution even without
any noble metal co-catalysts. During the growth process, the nanoparticulated ZnS nanowires formed first,
followed by ZnO nanocrystal growth with intercalation inside the ZnS nanowires. This growth mode
10 could result in enriched ZnS-surface-states on the ZnO nanocrystal surfaces, as evidenced by the
weakened absorption features and quenched band gap emission of ZnO in the ZnS/ZnO hybrid nanowires.
Further studies by varying the ZnS to ZnO ratio in the ZnS/ZnO hybrids also proved that the population
of ZnS-surface-states is crucial to the visible-light activity for photocatalytic H2 evolution. This work
provides a meaningful way to develop heterostructured composites as visible-light-active photocatalysts
15 by using wide band gap semiconductors for solar fuels production. |
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School of Materials Science & Engineering |
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School of Materials Science & Engineering Wang, Zheng Cao, Shao-Wen Loo, Say Chye Joachim Xue, Can |
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Article |
author |
Wang, Zheng Cao, Shao-Wen Loo, Say Chye Joachim Xue, Can |
author_sort |
Wang, Zheng |
title |
Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation |
title_short |
Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation |
title_full |
Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation |
title_fullStr |
Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation |
title_full_unstemmed |
Nanoparticle heterojunctions in ZnS/ZnO hybrid nanowires for visible-light-driven photocatalytic hydrogen generation |
title_sort |
nanoparticle heterojunctions in zns/zno hybrid nanowires for visible-light-driven photocatalytic hydrogen generation |
publishDate |
2013 |
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https://hdl.handle.net/10356/95757 http://hdl.handle.net/10220/10197 |
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1772827322093666304 |