Affiliation:
1. Department of Applied Chemistry Faculty of Science and Engineering Kindai University Kowakae, Higashiosaka Osaka 577-8502 Japan
2. Precursory Research for Embryonic Science and Technology (PRESTO) Japan Science and Technology Agency (JST) 4-1-8 Honcho Kawaguchi 332-0012 Japan
Abstract
AbstractCopper (Cu) nanoparticles (NPs) loaded on titanium(IV) oxide (TiO2) exhibit an extinction at about λ=580 nm because of surface plasmon resonance (SPR); however, they rapidly lose their its SPR when exposed to air. In order to stabilize the Cu NPs, a multi‐step photodeposition method was used to introduce chromium, which resulted in successful synthesis of a Cr2O3/Cu/TiO2 sample that exhibited extinction even when exposed to air. Transmission electron microscopy, scanning transmission electron microscopy, X‐ray photoelectron spectroscopy and UV‐vis spectroscopy were utilized to analyze the Cu/TiO2 and Cr2O3/Cu/TiO2 samples with a focus on SPR of the nanoparticles and state of the Cu species. The prepared Cr2O3/Cu/TiO2 samples acted as plasmonic photocatalysts in oxidation of 2‐propanol under aerated conditions and visible light irradiation. Expandability of the Cr2O3/Cu/TiO2 plasmonic photocatalyst was also investigated, and the results suggested the potential of a Cu‐based plasmonic photocatalyst working under irradiation of visible light.
Funder
Japan Science and Technology Agency
Japan Society for the Promotion of Science
Nippon Sheet Glass Foundation for Materials Science and Engineering