Small· 2026Q1
Titanium Oxide Thin Films With Metal Nanodisks as Plasmonic Metamaterial Photocatalyst Sheets for IPA‐Assisted CO 2 Reduction
- 0citations
- Q1SCImago
- 2026year
Short summary
New metamaterial photocatalyst sheets combining TiO2 films and periodic arrays of Ag, Au, Pt, or Pd nanodisks achieve solar fuel generation from CO2.
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Key points
- Metamaterial photocatalyst sheets combine TiO2 thin films with periodic arrays of plasmonic metal nanodisks (Ag, Au, Pt, Pd).
- Tested for solar fuel generation (H2, CH4) from CO2 using water and isopropyl alcohol under UV–vis–NIR light.
- Pt/TiO2 and Pd/TiO2 catalysts achieved H2 production rates of 4.37 µmol cm−2 h−1 and CH4 rates of 0.42 µmol cm−2 h−1.
- Fabrication uses standard semiconductor methods, indicating potential for large-scale applications.
AI-generated from the title and abstract; the full text is not read.
Abstract
ABSTRACT Plasmonic metals are considered a promising approach for enhancing the reactivity of solar‐driven photocatalysts when used as co‐catalytic nanostructures. However, optimizing the energy conversion efficiency is challenging because it requires precise control of the light‐matter interactions at the nanoscale. In this work, we present metamaterial photocatalyst sheets that combine titanium dioxide (TiO 2 ) thin films and plasmonic metal nanodisks arranged in periodic arrays. Silver (Ag), gold (Au), platinum (Pt), and palladium (Pd) were used as nanodisk metals. We tested our photocatalyst sheets for generating solar fuels hydrogen (H 2 ) and methane (CH 4 ) from carbon dioxide (CO 2 ) using steamed water (H 2 O) mixed with isopropyl alcohol (IPA) as a sacrificial agent under broadband (UV–vis–NIR) light exposure. Our Pt/TiO 2 and Pd/TiO 2 photocatalysts achieved gas product rates of 4.37 µmol cm −2 h −1 for H 2 and 0.42 µmol cm −2 h −1 for CH 4 . The fabrication process flow is based on standard semiconductor fabrication methods, showing its potential for large‐scale applications.
The authors' abstract, as published at the source. Small, 2026 · DOI ↗
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Field: Renewable Energy, Sustainability and the Environment
Renewable Energy, Sustainability and the EnvironmentEnergy