Effect of Ag NPs on the radiant absorption of photocatalyst film

Jiayu Li; Jiewen Guo; Jiayu Li; Jiewen Guo

doi:10.3934/energy.2021038

AIMS Energy

2021, Volume 9, Issue 4: 830-841. doi: 10.3934/energy.2021038

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Effect of Ag NPs on the radiant absorption of photocatalyst film

Jiayu Li ^,,
Jiewen Guo

MIIT Key Laboratory of Thermal Control of Electronic Equipment, School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Received: 31 May 2021 Accepted: 21 June 2021 Published: 28 June 2021

A composite film composed of Ag nanoparticles, Al₂O₃ and TiO₂ was prepared by cosputtering. Ag NPs were immersed in the Al₂O₃ host, TiO₂ was deposited onto the Ag/Al₂O₃ layer. The degradation of aqueous methylene blue under incident irradiation indicated that the Ag/Al₂O₃-TiO₂ composite film with the Ag-TiO₂ distance of 2nm or 5nm exhibited high degradation rate. Spectral absorptivity and radiant absorption distribution were analyzed through FDTD simulation to analyze the relationship between radiant absorption and photocatalytic activity. Results indicated that the spectrum and distribution of the radiant absorption in the composite film could be rationally regulated to improve photocatalytic activity.
- Ag nanoparticle,
- localized surface plasmon resonance,
- spectral absorptivity,
- absorption distribution,
- FDTD simulation,
- plasmonic photocatalyst
Citation: Jiayu Li, Jiewen Guo. Effect of Ag NPs on the radiant absorption of photocatalyst film[J]. AIMS Energy, 2021, 9(4): 830-841. doi: 10.3934/energy.2021038

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Abstract

A composite film composed of Ag nanoparticles, Al₂O₃ and TiO₂ was prepared by cosputtering. Ag NPs were immersed in the Al₂O₃ host, TiO₂ was deposited onto the Ag/Al₂O₃ layer. The degradation of aqueous methylene blue under incident irradiation indicated that the Ag/Al₂O₃-TiO₂ composite film with the Ag-TiO₂ distance of 2nm or 5nm exhibited high degradation rate. Spectral absorptivity and radiant absorption distribution were analyzed through FDTD simulation to analyze the relationship between radiant absorption and photocatalytic activity. Results indicated that the spectrum and distribution of the radiant absorption in the composite film could be rationally regulated to improve photocatalytic activity.

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