Gold‐Nanoparticle‐Loaded Carbonate‐Modified Titanium(IV) Oxide Surface: Visible‐Light‐Driven Formation of Hydrogen Peroxide from Oxygen |
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| Authors: | Miwako Teranishi Riyoko Hoshino Dr Shin‐ichi Naya Prof?Dr Hiroaki Tada |
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| Affiliation: | 1. Environmental Research Laboratory, Kindai University, Osaka, Japan;2. Department of Applied Chemistry, School of Science and Engineering, Kindai University, Osaka, Japan |
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| Abstract: | Gold nanoparticle‐loaded rutile TiO2 with a bimodal size distribution around 10.6 nm and 2.3 nm (BM‐Au/TiO2) was prepared by the deposition precipitation and chemical reduction (DP‐CR) technique. Visible‐light irradiation (λ>430 nm) of the BM‐Au/TiO2 plasmonic photocatalyst yields 35 μm H2O2 in aerated pure water at irradiation time (tp)=1 h, and the H2O2 concentration increases to 640±60 μm by the addition of 4 % HCOOH as a sacrificing electron donor. Further, a carbonate‐modified surface BM‐Au/TiO2 (BM‐Au/TiO2‐CO32?) generates a millimolar level of H2O2 at tp=1 h with a quantum efficiency (Φ) of 5.4 % at λ=530 nm under the same conditions. The recycle experiments confirmed the stable performance of BM‐Au/TiO2. |
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| Keywords: | hydrogen peroxide oxygen reduction reaction plasmonics photocatalysis solar chemical transformations |
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