A low-cost, highly stable, superior-efficient heterogeneous photocatalyst by the synergetic hybrid of 2D-MoS2 nanofilms, 1D-Si nanowires, 0D Au nanoparticles for solar-driven hydrogen evolution

Ta-Jen Yen; Chun-Yen Chen; Takuo Tanaka

doi:10.1117/12.2677380

5 October 2023 A low-cost, highly stable, superior-efficient heterogeneous photocatalyst by the synergetic hybrid of 2D-MoS2 nanofilms, 1D-Si nanowires, 0D Au nanoparticles for solar-driven hydrogen evolution

Ta-Jen Yen, Chun-Yen Chen, Takuo Tanaka

Author Affiliations +

Proceedings Volume PC12663, Molecular and Nanophotonic Machines VI; PC126630F (2023) https://doi.org/10.1117/12.2677380
Event: SPIE Organic Photonics + Electronics, 2023, San Diego, California, United States

Abstract

Plasmonic materials that show strong electromagnetic field confinement effects hybridized with atomically thin transition metal dichalcogenides exhibit strong light–matter interactions. Herein, such a system has been designed in the form of a silicon nanowire (SiNW)/ gold nanoparticles (AuNP)/ molybdenum disulfide (MoS2) nanofilms heterostructure (SiNW/AuNP/MoS2), which exhibits excellent photocatalytic hydrogen evolution reactions. The absorption frequency of 2D-MoS2, the antireflection frequency of 1D-SiNW, and the resonance frequency of the 0D-AuNP, respectively, match with the visible range, indicating that the material effectively utilizes solar energy. Additionally, an optimal MoS2 structure that is a hybrid of both 1T and 2H phases was prepared with high reproducibility using facile pyrolysis, with the structure benefiting the hydrogen evolution performance of the material. Moreover, the silicon nanowire substrate exhibits high antireflection properties due to light-trapping effects, achieving 95% for the visible light absorption. By introducing silicon nanowire, a p–n junction is formed at the MoS2/Silicon nanowire interface that facilitates charge separation. The 1D silicon nanowire/0D gold nanoparticles /2D MoS2 nanofilms exhibits a high hydrogen generation rate of 246 mmol g−1 h−1. Overall, a low-cost, eco-friendly hybrid-structured catalyst was designed that exhibits excellent HER performance.

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Ta-Jen Yen, Chun-Yen Chen, and Takuo Tanaka "A low-cost, highly stable, superior-efficient heterogeneous photocatalyst by the synergetic hybrid of 2D-MoS2 nanofilms, 1D-Si nanowires, 0D Au nanoparticles for solar-driven hydrogen evolution", Proc. SPIE PC12663, Molecular and Nanophotonic Machines VI, PC126630F (5 October 2023); https://doi.org/10.1117/12.2677380

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KEYWORDS

Nanowires

Hydrogen

Gold nanoparticles

Nanofilms

Gold

Silicon

Antireflective coatings

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